Join Date: Sep 1999
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Re: whats grabbable from 85 s15 *4x4, 2.8,*
<font face="Comic Sans MS">A 1985 GMC S15 4x4 should have:
NP207 T-case, I believe this has around 2.7:1 low range. A little tag on the back will tell exact low range ratio. High range is 1:1.
T-4, or T-5 transmission (non-World Class), this transmission as your buddy figured out, isn't the greatest... If it's an auto transmission, it'd be a 200r4 or 700r4 with GM 60 degree bolt pattern. A couple years of Jeep Cherokee used the GM 2.8L V6, and to my knowledge you could get a transmission with a Dana 300 attached, (or should be able to adapt it up fairly easily). The transmission in the Jeeps If I recall correctly from Jeep Midsize forum is a bit more desirable than the GM version. [img]images/icons/crazy.gif[/img]
Rear diff will be GM's 7.5" 10 bolt. A decent axle, steer clear of it if it's got a code of "Locker" or "G-80" in the glovebox. Those things are notorious for destroying themselves. Is known as the Gov-Lock... [img]images/icons/frown.gif[/img] I've had one go out on me, nearly grenading itself, and the one in my 92 GM fullsize 3/4 HD isn't acting like it's long for this world either... [img]images/icons/crazy.gif[/img]
As was mentioned, steering components are good, might require a little bit of work to swap 'em in there, but they're good solid units.
That's probably about all you'd want out of the S truck except for maybe seats (if you like 'em), and things like that...
Some will tell you that the 2.8L is under powered in the S series, I don't see that being an issue in a lighter vehicle such as Zuk's. I personally didn't have a problem with mine at all in my S series p/u of the same vintage, although once 2nd gear went out in the transmission it got a little more sluggish having to go from 1st to 3rd when taking off. Although it did do respectably still... [img]images/icons/crazy.gif[/img]
Carbuerator should be Rochester Vari-Jet (or Vari-Jet II). This carbuerator is desirable due to it's ability to run at steep angles and not flood out, also higher speed whoops, etc don't seem to affect it. It can be a pain in the backside to adjust, but once it's dialed in it should be just fine. [img]images/icons/crazy.gif[/img]
That's about all I can think of at the moment...</font>