Transmission Gasket Kits

Is your gearbox leaking oil, or does it need to be stripped down and rebuilt? A complete gasket kit brings together the gaskets that typically need replacing when the gearbox is opened, so you don't have to source each part individually.

What does a transmission gasket kit contain?

A gasket kit typically includes gaskets for the covers and housing parts that need to seal when the gearbox is reassembled. The contents depend on the kit, so check the product description to see whether, for example, oil seals are included. From Fel-Pro we have kits for manual gearboxes in models such as the Ford Ranger, Chevrolet Camaro and Chevrolet C10, while Cometic Gasket offers, among other things, a rebuild kit for the Harley-Davidson Softail from 2007 onwards. The category also includes parts from TwinPower.

How to choose the right kit

The gearbox type and the kit's part number are the most important starting point, as the same car model may have been supplied with different gearboxes depending on the model year. So compare the kit number with your gearbox rather than just the car model. Clean the sealing surfaces thoroughly before fitting new gaskets, and follow the manufacturer's instructions on any sealant and tightening torque. If you're looking for individual gaskets or seals, you'll find them under transmission gaskets and seals.

Frequently asked questions

Should I replace the whole kit or just the leaking gasket?

For a small, isolated leak, a single gasket can be enough. If the gearbox has to be opened anyway, a complete kit typically makes sense, because old gaskets are often hardened or compressed and rarely seal well again.

How do I find the right kit for my gearbox?

Use the gearbox type or code and compare it with the kit's part number, e.g. TS 80681 or TS 5100 on the Fel-Pro kits. Car model and model year alone are not always enough, because the same model may have been supplied with different gearboxes.

Why is the gearbox still leaking after replacing the gaskets?

It can be caused by dirty or damaged sealing surfaces, incorrect tightening or a leak elsewhere, e.g. at an oil seal. Also check the oil level and whether the breather is clear, as excess pressure can force oil out.