One limitation of the R-series transmission is its first gear thrust washer. The factory thrust washer fails under heavy loading due to a narrow cross-section with a square lock-pin keyway.

This part is made in the USA with USA sourced chromoly, and uses a tool steel strength pin.

We recommend this thrust washer for those who are pushing 300+ ft-lbs of torque through their R-series transmission, which covers any lightly modded 87-92 Supra turbo 5 speed, and for everyone doing any internal work for their transmission!

Applications include R150, R150F, R151, R151F, R154, and other R-series transmissions.