The rear gears are probably the best bang for the buck on these cars. I still have the 3.08s in my coupe. I'm planning on swapping to 3.55 or 3.73 and changing all the bearings and axles sometime soon. I don't think I'm brave enough to do a 4:10 rear.
With the ratios in the t5z the 4.10s aren’t too bad. 2200 rpm at 65 mph
3.55 or 3.73 works good too
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