Engine & Drivetrain
Hey all, I'm considering changing my 4.1 ratio to 4.3 or 4.6 for lower 4L and to raise the engine RPM for the hiway. Its a 93 GQ td42 with the 4 spd automatic with TC lockup. Currently 4L just isnt low enough, and on the hiway with the torque converter locked up it runs around 1800 rpm at 110kph...