Join Date: Jun 2000
Location: Tualatin, Oregon, United States of America, North America, Earth, Milkyway Galaxy, Universe...
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Re: sm 420 in a YJ?? opinions appreciated
I don't nessacarily(sp?) think you'll lose your top speed, but probably will be reving the motor pretty high with only 4 gears doing 75mph. Also, do you have an SM420 available already? As I know it, they're becoming harder to find, and harder to find replacement parts for. So keep that in mind. Anything you do in terms of a swap will be MILES ahead of that peugot POS. Just keep in mind you'll need a few adapters, and those run a little bit of $$$. Have you considered a T18, NP435, or SM465? All are great trannies with low first gears. You could also look into doing an AX15 swap or NV3550 swap. Good luck!