Transmission ID and VIN Derivative Location - Corvette T56 and 4L60-E

Transmission ID and VIN Derivative Location (Corvette T56 and 4L60-E)





All engines and transmissions, as well as removable roof panels, are stamped or laser etched with a partial Vehicle Identification Number (VIN), which was derived from the complete VIN. A VIN derivative contains the following nine positions:
^ Position 1 is the GM division identifier.1 = Chevrolet
^ Position 2 is the model year code.5 = 2005
^ Position 3 is the assembly plant code.5 = Bowling Green, KY
^ Positions 4-9 contain the assembly plant sequential number for the vehicle.
A VIN derivative can be used to determine if a vehicle contains the original engine, transmission or removable roof panel, by matching the VIN derivative positions to their accompanying positions in the complete VIN:
^ VIN derivative position 1 = VIN position 3
^ VIN derivative position 2 = VIN position 10
^ VIN derivative position 3 = VIN position 11
^ VIN derivative positions 4-9 = VIN positions 12-17

Borg Warner Tremec 6-Speed Manual Transmission





The 6 speed manual transmission, the Borg Warner Tremec T-56 (RPO M12 and MM6), is stamped with a VIN derivative on the LH side of the transmission case.

Hydra-Matic 4L60-E Automatic Transmission
The 4 speed overdrive automatic transmission, the Hydra-Matic 4L60-E/4L65-E (RPO M30/M32/33), is stamped or laser etched with a transmission identification number and a VIN derivative.





The transmission identification (ID) number provides the transmission model and when it was built. The transmission ID number is located on the bottom of the case just rear of the oil pan.

VIN Location





1 - VIN Derivative Optional Location LH
2 - VIN Derivative Primary Location
3 - VIN Derivative Optional Location RH
4 - VIN Derivative Optional Location RH
The VIN derivative will be placed in one of four locations illustrated.