Transmissions

Is your transmission slipping, or does it need rebuilding after a tough project? This category contains parts for automatic transmissions and CVT transmissions: torque converters, rebuild kits, control modules, transmission pans and CVT belts. The parts are for you if you want to strengthen, cool or rebuild an existing transmission, from diesel vehicles to ATVs and UTVs.

What the transmission parts do

A torque converter transfers power from the engine to the automatic transmission. Its stall speed and lock-up clutch can affect how the car pulls and how hot the fluid gets. Control modules manage shift points and pressure, while rebuild kits typically combine seals, friction plates and other wear parts for a rebuild. You will also find individual parts such as billet input shafts, accumulators, pressure adapters and deep pans, as well as CVT belts for CVT transmissions, e.g. Gates G-Force RedLine.

How to choose transmission parts

Start with the exact transmission code, not just the car model. The parts are made for specific types, e.g. 48RE, 68RFE, 4R100 or 10R80, and even related transmissions can have different dimensions and connectors. Then consider:

• Power goals and load: more torque, towing or track days place different demands on friction material, shafts and the torque converter.
• Cooling: a deep pan, e.g. the ATS Diesel 68RFE in aluminium with +5 quarts, increases fluid capacity and can help prevent overheating, but it must suit the ground clearance and the space under the vehicle.
• Control: a modified torque converter or pressure may require the shift control to be adjusted.

Installation and maintenance

Working on an automatic transmission requires the correct fluid type, clean surfaces and often special tools, so consider a workshop with experience. In case of extensive damage, a complete automatic transmission can be an alternative to a rebuild. Change fluid and filter according to the manufacturer's instructions, and watch out for delayed shifts, slipping or a burnt smell from the fluid. Brands in the category include FTI Performance, ATS Diesel, Gates, Hot Rods and Pure Drivetrain Solutions.

Frequently asked questions

Should I rebuild or replace my automatic transmission?

It depends on the extent of the damage. With wear on friction plates and seals, a rebuild kit may be enough, while a cracked case or damaged shafts and planetary gears can make a complete transmission the more sensible choice.

Why does my automatic transmission get too hot?

Overheating can be caused by high load, towing, a slipping torque converter, low fluid level or degraded fluid. A deeper pan with more fluid can help, but find the cause first.

When should a CVT belt be replaced?

It depends on the vehicle, driving and load. Check the belt for cracks, frayed edges, glazing and uneven width, and follow the manufacturer's instructions. Heavy loads and mud can increase wear.

Can transmission modifications affect inspection and approval?

It depends on the product and the car, especially if the control or software is changed. Always check the requirements and any approval for the specific part number before installing the part.