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Vehicle Info NeededTransmission Adapter Kit 4L65-E and 4L70-E Transmissions
Ships on Sep 14, 2026
Lowest Price Guarantee- Transmission Adapter Kit
- 4L65-E and 4L70-E Transmissions
This kit has been engineered to allow late model 4L65-E and 4L70-E transmissions to be utilized with older small block engines that utilize a one piece rear main seal design, such as the Ram Jet 350 and the full lineup of small block crate engines in the GM Performance Parts arsenal. This complete kit provides all the required components including hardware, dowels, flexplate, spacer, and dust shield.
Complete Your GM Crate Engine and Transmission Attachment Needs
The Chevrolet Performance Transmission Adapter Kits are specially designed to allow the enthusiast to take advantage of the latest in transmission technology in one easy step. Late-model transmission technology includes greater horsepower and torque capability as well as improved efficiency through both design and manufacturing improvements. There are no additional specialized or custom items required, and these kits completely bolt-in with no modifications necessary. They also allow for a lower cost 300mm production style torque converter, or aftermarket equivalent, to be utilized.
Note: You will require an older style flexplate if installed on a two-piece style rear main seal small block engine or using the 4L70E trans on a big block engine.
