Corvette 6 Speed Transmission

Standard Transmission & Gear, Inc.

The Standard You Demand

Let us help you fit your car.

We service everything we sell. Period.

The ZF 6 speed for the Corvette has been a topic of controversy for some time.

Whether GM had a parts coup in mind, or that ZF decided no one was able to build these units except for the factory is a matter of conjecture. The fact is that until recently, if you had a problem with the ZF, you had to buy a complete unit from the dealer.


Parts for your ZF 6 speed are hard to find and they’re not cheap, but they’re a darn site less than a unit. We have the expertise to rebuild your unit for you.


Send us your unit & we’ll completely disassemble, clean, & inspect it. Then we’ll call with an exact amount to repair it.

The list below contains some of the most often needed parts.


Synchronizer Kit
Main Bearing Kit
Needle Bearing Kit
Rebuild Kit (seals, gaskets, plugs)
Bench labor to rebuild your unit
Rebuilt unit, exchange
Core charge, refundable


How to identify your ZF:

S5-31 5-speed manual transmissions have a three-letter code stamped to the main housing. The S6-40 6-speed manual transmission and all other 4, 5 and 6-speed manual transmissions have an I.D. plate affixed to the main housing. The ZF transmission number is stamped onto this plate.

What type of lubricant:

ZF only recommends the following lubricant for S6-40 transmissions. The GM oil (available from GM with part number 1052931) and the Castrol Synthetic Formula RS 10W60 (available from BMW with part number 0751009420

We can usually rebuild your transmission for less than exchanging it. All of our new and rebuilt transmissions carry a 12mo/12,000 mile warranty. Send us your transmission, transfer case, or differential & we'll disassemble, clean & inspect it. Next, we'll contact you with an exact price to repair the unit, including all parts and labor. After you approve the work, we can usually complete the repairs in 3-4 business days.