Join Date: Sep 1999
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Re: 87/88 S15 Jimmy
You probably won't want the Toy axle due to birfields (expensive to replace compared to $8 u joint)... They are basically the same strength, from what I've heard, but the expense of birfields is the downside to the Toy axle... Oops, I didn't realize you'd know more about those than I do... [img]/wwwthreads_images/icons/wink.gif[/img] It probably had 3.73's or something like that.. The best way to tell would be to pull the rear differential cover and read the fraction on the ring gear... It either had an NP207 or NP231/NP233 for a transfer case.. The 207 isn't apparently as desireable as the other two choices. There should be a tag on the back of the transfer case with the model of the case, and the low range ratio. If it's a 4 speed automatic transmission, it will be a 700r4.. The front end should be 7.2" ring gear. I was thinking about a Jeep front axle, but I haven't found out much about them, like how far apart the spring pads are, and things like that. The front end is weak and most likely wouldn't hold up to a locker very well at all... The posi type thing in the rear would be a Gov-Lok (I believe) and when they get older, sometimes have a reputation for grenading themselves under stress (like when you get one wheel spinning and it suddenly decides to lock up, it could hurt itself...
[img]/wwwthreads_images/icons/cool.gif[/img] '79 Suburban 4x4 454, 6" lift, 35x12.5s & '85 GMC S15 4x4