Repair And Fix it

Ask any mechanic and youll be assured that having your transmission serviced on a regular basis is a smart move and will extend its life. Service can range from a basic service check to a pressurized flush. Aside from the fact that a flush replaces the old fluid in your transmission with new fluid, this procedure also cleans the filter and system; in addition, it can identify minor transmission issues before they become major problems.

General Benefits

A general transmission service involves removing the fluid pan, replacing the filter and gasket, and replacing some of the transmission fluid. According to Speed Lube, this routine service extends the life of the transmission. Clean lubricant prevents seals and gaskets from hardening, which can cause metal parts to warp and valves to stick.

Full Transmission Flush Benefits

A flush replaces all of the vehicles transmission fluid. Pressure is used to push all of the old fluid out so that it can be replaced with new fluid. Flushing also does a good job of cleaning out a transmissions internal parts and its filter.

Discovering Transmission Issues

Both general service and a flush can reveal transmission problems but a flush will give a more accurate indication of what is going on inside your transmission. This is because the pressurized cleaning method helps expose decaying seals and cracks. It will be less costly to replace an old seal or gasket than to wait for serious damage to occur and then have to replace the complete transmission.

The exhaust gas recirculation valve, or EGR valve, is part of the Mercury Sables emissions control systems. EGR valves, which were introduced in the 1970s, are now included on all automobiles in the United States.

Purpose

The EGR valve, usually located on the intake manifold, reduces oxides of nitrogen (NOx) that form in internal combustion engines when temperatures reach 2,500 degrees Fahrenheit or more. Nitrogen and oxygen combine to form NOx, a component of smog.

Function

As its name implies, the EGR valve recirculates exhaust gases back into the combustion chamber. Because the exhaust gases cannot be burned again, the result is cooler temperatures in the combustion chambers---several hundred degrees cooler. This reduces the production of NOx.

Performance

The creation of the EGR valve has enabled auto engineers to design more aggressive timing for engines, increasing efficiency and, as a result, improving fuel economy. A malfunctioning EGR valve, however, leads to engine ping and knocking.

Water and fuel dont mix, so its never a good idea to put water into a cars gas tank. However, when water does get into a gas tank, either accidentally, or as the result of a malicious prank, the result is engine trouble.

Condensation

Water can get into a gas tank even if you didnt put it there. Sometimes water gets in through a badly sealed cap on the tank, or by natural condensation on the inside of the gas tank

Problems

Water in the gas tank may lead to the car bucking, stalling or not starting at all, or starting the car could be difficult. This is because the water and fuel separate, especially when the car has been sitting for a while, and the water sinks to the bottom with the fuel on top. Water can also get into other parts of the engine causing rust and corrosion.

Removal

The method you use to get rid of water in your cars gas tank depends on how much got in there in the first place. In the case of only a little water, an additive that dries up water could be used. The additive combines with the water as it goes through the running engine. If there is a lot of water, a mechanic will have to remove the gas. This may include removing the fuel tank from the car and putting in new filters. The tank is then put back and is filled with clean gas.

Intake gaskets seal gaps between the intake manifold and the cylinder head. They are made in thicknesses ranging from 0.060 inch to 0.120 inch. If too much air gets into the system, the car will not run properly.

Intake Manifold

Gaskets are located throughout the engine, but one of the most important parts of the engine is the intake manifold. The intake manifold regulates the amount of air and fuel your engine gets to create the combustible reactions that power the business. The gaskets can withstand temperatures of 500 degrees Fahrenheit and higher. Some gaskets are made from high-temperature plastic that actually cools the air that passes through them.

Gasket Problem Symptoms

You know that your intake gaskets are no longer doing their job if you start seeing puddles forming under the car when it is in park or when you see a leak in the coolant system. Also, if your engine is rough and slightly jerky, or if you hear whistling from the engine taking in excess air, you have problems with your gaskets.

Repair

A vacuum gauge that checks manifold pressure is used to find the leak. All coolant must be drained from the vehicle and the manifold must be removed in order to replace the gaskets.

Warning

In the book, "Small Black Chevy Engine Buildups," the editors write that with too much air "your engine will turn into melted cheesecake; too little and itll drive like melted cheesecake."

While a vehicle with a cracked radiator remains operable and can be driven as long as you ensure it remains continually full of water, doing so is not a good idea. The radiator and the coolant that it holds performs a number of crucial functions for proper engine operation. A crack in the radiator will reduce pressure, introduce air into the system and foul the ground with poison. Even if you stop to fill the radiator regularly, the breach in the system will ultimately affect the engine overall.

Overheating

The primary purpose of a radiator is to cool the engine. When a radiator is cracked, coolant leaks from the radiator, causing the level to fall, resulting in improper cooling or a complete loss of cooling. Overheating an engine can result in a damaged or ruined engine.

Loss of Lubrication

In addition to cooling the engine, antifreeze lubricates the water pump. When the radiator is low on antifreeze or even filled with just water, no coolant, the water pump is not properly being lubricated, which can cause premature pump failure.

Expense

While the primary reason that one might choose to drive with a cracked radiator is to avoid the cost of repair or replacement, the costs of antifreeze and damage to the vehicle will far outweigh any short-term savings. To save money, a car owner may choose to repair the damaged radiator or to purchase a used one.

Drive shafts, also called propeller shafts, are a very important part of a vehicles engine system. They are essentially hollow tubes which connect the transmission output shaft to the differential pinion shaft. The vast majority of drive shafts are made from steel, including those for racing vehicles, motor homes, trucks, four-by-four vehicles and replacement parts. Different kinds of steel are used on various types of drive shafts.

OEM Steel Drive Shafts

OEM steel drive shafts are rated for less heavy-duty service than other types of steel drive shafts. Usually they can handle about 350 pounds per foot, or about 350 to 400 horsepower. This is the lowest performance level for steel drive shafts.

Dsaya Steel Drive Shafts

Dsaya steel drive shafts, stronger than OEM drive shafts, usually can handle about 1,300 pounds per square foot of pressure, which is comparable to about 1,000 to 1,300 horsepower. If your car does not require a lightweight unit, a Dsaya steel drive shaft is an excellent choice.

Chrome-Moly Steel Drive Shafts

Chrome-moly steel drive shafts are the strongest possible type of steel drive shaft. You will find this type of steel drive shaft in Pro Stock-style racing cars. Chrome-moly steel can be strengthened even further if it is heat-treated. Heat treatment will raise the torsional strength about 22 percent and raise the drive trains critical, or maximum, speed by about 19 percent.

CV Steel Drive Shafts

Constant-velocity (CV) steel drive shafts are so named because they revolve at the same speed during the entirety of their operation. One of the most common types of drive shaft, they come in several different subtypes, mostly characterized by the way in which the transmission output shaft and the differential pinion shaft connect.

Split Drive Steel Drive Shafts

Split drive steel drive shafts are two-piece drive shafts used on many vehicles with longer wheelbases. They are characterized by an extra U-joint and a center bearing which provides greater support to the shaft assemblys middle area.

Torque Tube Steel Drive Shafts

Torque tube steel drive shafts are used on cars with independent rear suspensions. This type of drive shaft is connected rigidly at both ends, with a rotating inner shaft.

Flexible Steel Drive Shafts

Flexible steel drive shafts are very rare and quite different than other steel drive shafts. They are not rigid shafts but are instead just large steel cables.

The ignition system in your car takes the spark generated by the distributor pickup coil and sends it through the plug wires to the spark plugs at just the right time. With this in mind, the pickup coil is a vital part of the ignition system.

Definition

The distributor shaft is typically turned by a gear on the bottom of the shaft. This gear is turned either by a timing belt, a timing chain or directly by the camshaft. The pickup coil is around this shaft, generally under the distributor rotor. The pickup coil is an electromagnetic sensor.

Function

On the distributor shaft there is a raised metal "tongue." This tongue passes by the pickup coil each time the distributor rotates. This causes the pickup coil to send a signal to the ignition control module, letting it know where the distributor is in its rotation. This corresponds with where the motor is in the compression cycle. The control module then knows when to send spark to the coil.

Options

Modern vehicles usually have a camshaft position sensor or a crankshaft position sensor and sometimes both. These work on the same principle as the pickup coil; but because they are located directly beside the crankshaft and the camshaft, they are more accurate. In newer vehicles these sensors also help time fuel delivery through the injection system, making them more efficient.

Transmissions allow you to easily shift a vehicle into drive, park or reverse when it is working properly. Low fluid levels or even a bad solenoid cause problems that can be handled without the need to tear down the entire transmission. However, internal problems more serious than these can also occur, bringing about the need to have the transmission rebuilt.

Search

Many transmission shops use to do transmission rebuilding jobs. By replacing transmissions instead of rebuilding them, shops can earn more profits for themselves. Because of this, you may need to do a thorough search before you can find a shop willing to rebuild your transmission.

Cost

A good way to estimate what it will cost you to have your transmission rebuilt is by taking the cost of what the transmission would cost new and splitting that in half. For example, if your transmission cost $2,000 new, you can expect to pay about $1,000 to have it rebuilt.

Labor

The labor performed with rebuilding a transmission starts with a total disassembling of the transmission. Each part is then caully inspected to see whether cleaning is needed or total replacement of the part. Some parts are often replaced regardless of their condition, such as the torque converter.

An exhaust gas temperature (EGT) sensor is a device used to measure a car engines air-fuel ratio. It often is used on high-performance vehicles, particularly those that have turbocharged engines.

Purpose

The EGT sensor monitors the temperature of the exhaust system of certain internal combustion engines, specifically those that are turbocharged for high performance, like the Subaru WRX.

Placement

The EGT sensor can be placed before the turbo, where it measures the temperature of air as it enters the turbine, or after the turbo, where it measures the temperature of the exhaust.

Importance

High engine temperatures in an engines combustion chamber can cause detonation, resulted in melted valves and pistons, and generally destroying the engine. The EGT sensor can warn the operator of dangerously high temperatures, thus preventing fatal engine malfunction.

A smog pump is a crucial piece of equipment used for helping to reduce emissions. It is one of the systems found in automobiles that helps fuel burn cleaner.

Air Injection

The smog pump is the common term for the secondary air injection system (or just air injection system). After combustion occurs, the exhaust gases must leave the combustion chamber through a port. The air injection system pumps fresh oxygen into the exhaust port, causing the exhaust gases (hydrocarbon and carbon monoxide) to continue to burn and theore deplete more efficiently. On some vehicles, it also supplies air to the catalytic converter. The system usually consists of an air pump, a diverter valve, an air distributor and a check valve.

Air Pump

The air pump is what creates the force of the air to push fresh air into the system. It is run by a belt or electric motor.

Diverter Valve

The diverter valve is used by some cars to keep too much air from entering the system when the vehicle is decelerating, reducing backfiring and limiting air pressure.

Air Distributor

The air distributor is known as the air management valve or air distribution manifold. This valve switches the flow of air direction to point toward either the exhaust manifold or toward the catalytic converter, depending on the operating conditions of the vehicle.

Check Valves

Check valves prevent exhaust air from flowing into the system and causing possible damage.

According to Precote.com, liquid thread coating is the application of a sealant, lubricant or anti-corrosion chemical to the threads of screws, nuts and bolts. Liquid thread coatings are used by automotive manufacturers, the airline industry, railway companies, shipyards and nearly every manufacturing industry. Liquid thread coatings can be applied during the manufacturing process or after-market to the threads of screws, nuts and bolts.

Liquid Nylon

Liquid nylon provides a number of benefits when applied to part threads and works well on both iron and non-iron metal threads, such as steel, aluminum, brass and stainless steel threads. A thin layer of liquid nylon protects threads from wear, friction and corrosive elements and inhibits electrical conductivity. The nylon remains intact in both high heat and freezing temperatures.

Wax

Wax-based liquid thread coatings serve primarily as a thread lubricant. Wax-based liquid coatings are applied to nut, bolt and screw threads to make assembly smoother and to avoid cross-threading or sticking threads. The liquid wax is sprayed on the part or the part is dipped in the wax by a machine, or the wax can be applied by hand. New threaded parts may be coated with liquid wax lubricant at the end of the manufacturing process.

Teflon

Liquid Teflon is often applied to threaded parts as a sealant and to help reduce wear caused by friction. Liquid Teflon is typically used on screws, nuts and bolts that are subjected to vibration, such as those used in refrigeration units and manufacturing environments. Liquid Teflon thread lubrication applications may contain other chemicals, such as polytetrafluoroethylene that increase the efficiency of Teflon lubrication. Teflon is used on metal, plastic and fiberglass parts.

Fluoro-Carbon Coating

Liquid fluoro-carbon thread coatings prevent threads from damage during assembly of parts by lubricating the threads. Fluoro-carbon thread coating is often used on part threads if the final product will be painted before or after assembly. Once dry, the fluoro-carbon coating resists paint. Fluoro-carbon coatings also resist electroplated paints and primers.

Lifters in a car engine are part of the valve train, which operates the opening and closing mechanisms of the cylinders intake and exhaust valves. As the name suggests, they are the parts that physically lift and lower the plungers that allow the cylinder to "breathe."

Types of Lifters

Lifters fall into three types: hydraulic, mechanical and roller. Hydraulic lifters, the most common, are filled with engine oil that pushes the lifter plunger up and down as it is compressed by the camshaft. Mechanical lifters are fixed metal pieces that push the lifter plunger as the camshaft moves. Roller lifters contain a roller in conjunction with either a hydraulic or mechanical mechanism to reduce friction.

96 Honda Lifters

The lifters in a 96 Honda engine are hydraulic. The number of lifters in the engine depends on the Honda model and engine size in question.

Honda VTEC

In 1989, Honda introduced a more efficient valve train mechanism called VTEC with an extra specially adapted cam and pin attached to each pair of lifters. The cam pushes the lifters to open the valves further at higher engine speeds to increase engine performance.

Replacement Lifters

Replacement OEM (original equipment manufacturer) lifters and other parts for the valve train are readily available. Mechanics may also be able to suggest alternative parts that should work just as well.

Catalytic converters, which are responsible for igniting and burning unburned engine exhaust gases, became standard automotive equipment on all cars beginning with model year 1975. Although catalytic converters help to make engine exhaust gases cleaner, they are not without their minuses. What follows is a brief list of the potential benefits of removing automotive catalytic converters.

Increased Horsepower

Cars that have their catalytic converters removed experience an increase in engine horsepower. Catalytic converters create a significant source of engine back-pressure due to the constrictive effects they have on exiting engine exhaust gases. Removal of catalytic converters from cars allows exhaust gases to exit their engines much faster and at higher levels.

Better Gas Mileage

Since catalytic converter removal allows for exhaust gases to exit a cars engine at increased speeds, engine back-pressure is reduced, which lessens engine strain. This reduction in engine back-pressure and engine strain enables an engine to work more easily, and thus reduces fuel consumption and increases gas mileage.

Lower Engine Operating Temperature

Since removing a catalytic converter lessens the burden on a cars engine by enabling engine exhaust to vacate the engine more easily, a net effect is a reduction in engine operating temperature. The more easily an engine functions and the less work it has to do results in less friction, less load and, ultimately, a lower operating temperature.

More Fuel Options

Cars equipped with catalytic converters run only on unleaded gasoline. Lead-based gasoline, which produces more power and better engine combustion, quickly destroys the inner catalyst materials of catalytic converters. A car with no catalytic converter will be able to run on a variety of lead-based and/or high-performance fuels that would not be possible with a catalytic converter.

Healthier Exhaust Sound

Catalytic converters operate like car mufflers, whose sole purpose is to muffle the sound of exiting engine exhaust gases. Although catalytic converters burn unburned exhaust gases exiting an engine, thus making tail pipe emissions cleaner, they also further muffle a cars exhaust sound and bestow a somewhat timid, tempered exhaust sound. Without a catalytic converter, a cars exhaust sound becomes a little louder, a little deeper and more distinctive.

The location of the vehicle in winter will affect the type of oil chosen during colder months. Hawaii, for example, stays relatively warm all year and therefore there is less need to change oil weight with the season. Consulting the owners manual for the specific vehicle will reveal what the manufacturer recommends (for instance, the owners manual for a 2001 Honda Civic recommends using 5W-20 oil year-round, but 5W-30 is acceptable if 5W-20 is not available).

Numbers and Letters on Oil

The numbers on motor oil show the oils viscosity rating and range from zero to 50. The oils weight is the "viscosity index" on a scale up to 100 degrees Celsius. The lower number, often followed by a W for "winter", corresponds to the oils ease of movement during colder temperatures. The higher numbers correspond the the oils thickness and ability to maintain that thickness even at higher temperatures. Numbers such as 5W-30 have a wide range, from below -30 degrees to over 100 degrees.

Age of the Vehicle

Older vehicles, whose engines have high mileage, are often recommended to use or switch to an oil that is thicker. This will help limit the noise produced by older engines, as well as reducing the overall oil-consumption by the vehicle and prolong its life. The improved lubrication of the engine helps protect it from wear due to long-time use and age.

Regional Differences

Many newer vehicles, less than 20 years old for example, are recommended by manufacturers to use one type of oil year-round, such as the 5W-20 in a 2001 Honda Civic. If the location, however, suffers extremely cold winters (temperatures below -30 degrees Celsius, for instance) local auto parts stores and mechanics will have regionally-appropriate recommendations for oil weights. Not all manufacturers will account for such temperature extremes in the owners manuals so consulting local experts will prove helpful.

A Constant Velocity (CV) boot covers the CV joint, which joins to the CV axle of an automobile. It is found in all front-wheel drive vehicles and many four-wheel drive and rear-wheel drive autos as well. It is a rubber casing filled with grease that protects the joint from outside wear and tear and contains lubricant that reduces friction on the joint and prevents friction-related damage in the axles function.

Purpose

The CV boots cover the CV joints in an automobile. There are four of them on two-wheel drive vehicles and eight on four-wheel drive vehicles. They protect the CV joints both from friction-related damage and from external wear. This keeps the axle and steering capabilities of the car functional. The importance of the CV assembly is that it enables torque to be transmitted at a constant speed from the driveshaft to the turning wheels, while accommodating the vertical movement of the suspension.

Location

On automobiles that have CV boots, one pair of boots is located on either side of the vehicle along the drive shaft. The outer CV boots cover the joint between the axle and the wheel. The inner boots cover the joint between the axles and the transmission.

Appearance and Materials

A CV boot is usually a black rubber casing. It has an accordion-like fold across its surface to allow for the flexing actions of the joint. The overall shape of the boot is conical with the narrow side attached to the axle.

Warnings

While it is possible to continue to drive a vehicle with a damaged CV boot, it is not advisable. The more damaged the CV boot, the more the potential damage to the CV joint. A damaged CV joint ceases to transfer power to the wheels, which means the car is stuck where its parked until the CV joint is replaced. Replacing the CV boot as soon as it demonstrates risk is a good idea because its far less expensive than replacing the joint.

Backfire flame arrestors serve a vital safety function on watercraft. They are legally required and must be Coast Guard approved on inboard and stern-drive boats that use gasoline engines. Engine compartments can build up gas vapors and fumes that can ignite with a stray spark or flame. Occasionally engines can backfire, sending a flame up through the carburetor and into the engine compartment. The backfire flame arrestors function requires it to muffle and delete any such spark or flame, which could result in an onboard explosion.

Backfire Flame Arrestor Contruction

The backfire flame arrestor has a solid metal construction very similar to the older style air cleaner housings on cars and trucks. Most of the casing shells have circular designs, whereas some can use oval or square configurations. They attach solidly to the upper lip of the carburetor throat via a clamp, and bolt from the top into the carburetor body. They possess an interior baffle grid that resists flame, oil and fuel contamination. The airtight seal and grid within the flame arrestor halts and dissipates backfire flames from the carburetor.

Backfire Flame Arrestor Concept

When fuel and air can sustain combustion, they have a flammability factor. The internal combustion engine uses this ignition to power the cylinders. When a backfire occurs, the combustion process temporarily changes direction and travels up through the air intake passage. Hydrocarbon molecules need space and oxygen to ignite and propagate. When they enter the flame arrestor as a result of a backfire, their travel speed is drastically reduced, held in check by striking the interior grid element. The confined space inside the flame arrestor does not allow enough oxygen to continue the burn. The renegade flame is snuffed before it can expand.

Noise Levels

Backfire flame arrestors reduce and muffle combustion noise to a lower level. Since the flame arrestor completely seals the intake portion of the engine, engine noise becomes trapped within the confines of the grid. A backfire, which can cause high level shockwave noise, gets dissipated instantly with a back-flow pressure. This confines and mutes the explosion.

Regulations

Backfire flame arrestors must be permanently installed on vessels that have stern-drive or inboard motors. Outboard motor and diesel engines need not use them. The flame arrestor must be in adequate and serviceable condition, as prescribed by the U.S. Coast Guard, Underwriters Laboratories. The flame arrestor can not have any holes in the grid surface, nor oil or raw gas in the grid compartment. It must be sealed tight against pressure escape. Flame arrestors need to be inspected regularly,cleaned with soap and water and then refitted for proper seal.

Replacing the engine oil in your Volkswagen VR6 with the appropriate engine oil weight is important to maintain proper engine function. The type of oil you use depends on the weather. Oil that functions well in southern Texas may not be appropriate for winters in New England. By taking into account the temperature and information from your owners manual, you can determine the best oil to use in your car.

Temperature Considerations

Temperature should be a primary consideration when choosing engine oil. If you are going to operate your car at temperatures below 15 degrees Fahrenheit, choose an engine oil with a first weight of 10 or lower (e.g. 10W30, 10W40). If you are going to operate your engine above 100 degrees Fahrenheit, use an engine oil in which the second number is at least 50 (e.g. 10W50, 20W50).

Manufacturer Recommendations

VW recommends engine oil meeting Volkswagens "502.00" engine oil standard. Many oils meet the quality standards for Volkswagens 502.00 standard.

Approved Oils

Before purchasing oil, check the bottle or manufacturers website to make sure the oil conforms to Volkswagens standard. If you have any questions, contact your local Volkswagen dealer.

The exhaust pipes on your car, truck or motorcycle carry the gasses expelled from the engine during the combustion process safely to the rear of the vehicle. This is usually accomplished with pieces of steel tubing that are suspended to the underside of the vehicle. Since the exhaust usually has to wind over, under or around the vehicle undercarriage to get to the rearmost part of the vehicle, it is manufactured in several different pieces and either welded, bolted or clamped together to form a continuous flow. Each manufacturer may have different names for the various exhaust pieces, but may include the header pipe, front pipe, exhaust pipe, catalytic converter, muffler, resonator and tailpipe.

Exhaust Manifold

Converting the exhaust from each cylinder on your engine to a single outlet is usually accomplished with an exhaust manifold. An exhaust manifold is usually constructed of cast iron and is bolted to the cylinder head. V-type or boxer engines have two banks of cylinders -- one on each side of the block. In these cases, there should be an exhaust manifold bolted to each cylinder head. The exhaust manifold is usually not considered part of the exhaust system, but it gives the exhaust pipe a place to attach to.

Header Pipe

When referring to exhaust pipes, the header pipe sometimes refers to the part of the exhaust system that attaches directly to the exhaust manifold of the engine. If your vehicle is a single cylinder motorcycle or a vehicle that has an inline engine, a single header pipe would connect directly to the exhaust manifold or engine. Header pipes used on V-type or boxer engines can sometimes be referred to as a Y pipe, as it connects to both sides of the engine and comes together to form one pipe. Some vehicles use a dual exhaust system. These types of vehicles may a have a separate, single header pipe for each exhaust header.

Headers

Some vehicles may use factory or aftermarket exhaust headers in place of a cast iron exhaust manifold and header pipe. Headers are usually constructed of several pipes welded together and take the place of both the exhaust manifold and the header pipe. Headers are usually tuned, meaning the length of the tube that attaches to each exhaust port on the engine is engineered in such a way to extract maximum power and efficiency from the engine. Headers are factory-installed on some performance engines, but are usually an aftermarket accessory that is owner-installed.

Front Pipe

Depending on the manufacturer, the front pipe on an exhaust system can refer to pipe that bolts to the engine -- the header pipe -- or the pipe that connects the header pipe to the remainder of the exhaust system. The exhaust system on vehicles that have transverse-mounted engines may need to compensate for the back-and-forth rocking motion of the engine when accelerating or decelerating. Whereas the header pipe may be a solid, fixed pipe, a flexible pipe -- sometimes referred to as the front pipe -- connects the header pipe to the rear of the exhaust system. On some vehicles, the exhaust pipe that connects to the rear of the flexible pipe may be referred to as the front pipe.

The AX15 is a five-speed, standard shift transmission made by Aisin-Warner. Although the transmission is no longer used in newer vehicles, Aisin-Warner still produces the part.

Vehicle Models

Jeep used the AX15 in its 1988 Wrangler XJ and YJ models, the Comanche and the MJ Cherokee. The transmission was standard in all XJ, YJ and TJ Jeeps from 1988 to 1999. In 1993, the AX15 came in the ZJ Grand Cherokee in the six-cylinder model.

Description

The AX15 has a cast aluminum case and mid-plate. It measures 16.5 inches in length. It is a top-shifting, overdrive transmission with a split case. All gears are synchronized and helically cut. The gear ratios are 3.83 for first, 2.33 for second, 1.44 for third, 1.00 for fourth and 0.79 for fifth. The AX15 uses a 10-spline input shaft. It has a 23-spline output shaft and uses dowel pins for bellhousing alignment.

Variations

The input shaft pilot tips were smaller in the AX15 made from 1988 to 1991. They measured 19/32 inch, while later models use a 3/4-inch tip. The 1988 to 1993 models had an internal slave throwout, which was switched to a slave cylinder with cross arm design in later years.