will the 4cly diff bolt into a v6 axel and use the same spline and such or would i have to replace the whole rear end i know the fronts are the same

the reason i ask is because i have a chance to buy detriot locked 4.88 thirds for my 91 chevota pickup but there from a 4cly and mine org had the 3.0 thanks guys

 

Yes, you can put a V6 diff in a 4Cyl housing. Axles are the exact same.

 

thanks man the detriots and 4.88 have less than 2000 miles on them and the guy totaled his truck so i trying to get em for 500 wich would be a hell of a deal

 

http://home.4x4wire.com/erik/diffs/

 

Just the carriers are different I believe.

 

The front IFS diff is different i think. It won't take the 4cyl third I THINK....Check what you are getting into. I know The rear will fit, and unless you are running mondo horsepower, it will last forever. Why is hew getting rid of them??? Maybe something worng there. Check things like back lash, bearing preload etc.....might be to goog to be true.

 

Sorry for the bad typing. Firast day new fingers

 

IFS fronts from 1986-1995 were Identical. You only have to look for ADD vs non ADD. You can convert between the two, and they are direct bolt in, but you have to grab the vacuum hoses as well. Easier to just ADD if you have ADD, or non if you don't.

 

AxleIke beat me to the punch, but I'll let one fly anywho...

Think again, because that's incorrect. On both accounts, first, ALL IFS differentials(carrier, w/ring,side,and spider gears)are the SAME. Second there's no 3rd member.

 

Re read his posts, the guy totaled his truck, so he's selling them off.

Silly guys, he's interested in the rear 3rd, not the front.

 

Can't speak for mudhippy, but i was not responding to the OP, but to brooklee1000. Not sure why that makes me silly, but I'm willing to live with it.

 

 

the guy totaled his yota on a gravle road but the a 4cly ff and fr thirds with 4.88 gears and detroit tru trac in the rear and a full detroit of some kind in the front

 

Ha, I thought so...pretty unlikely to catch me slippin'...I know what page we're on.

 

MudHippy-"Think again, because that's incorrect. On both accounts, first, ALL IFS differentials(carrier, w/ring,side,and spider gears)are the SAME. Second there's no 3rd member."
Must be some miscommunication here. When I said Third member I meant the complete differential unit(carrier, ring and pinion plus spider gears) that you remove from the differential housing.

 

Sorry. My internet is screwy.

 

My original post was referring to the point that I thought that TRD_JW was getting front and rear diffs from a solid front axle truck. I apologize for any confusion. Whenever someone says 4cyl third or Diff, I usually assume that it means the old solid axles. Yes the 4cyl third fits into the rear axle of the newer v6 diffs, but I just wanted to ensure that if TRD_JW was getting a solid axle (4cyl) third, I did not think it would work in his IFS Setup. Just trying to be informative. AND if you have the thirds anyway, not a bad idea to check things like backlash and bearing preloads before install anyway. Suck to put things together and then have to replace because not checked before installation. There are more than a few guys here who will attest that even a proper install shop doesn't always do it properly, and somebody had to setup the gears in the thirds TRD_JW is buying.

 

Front 7.5 housings are the same like mentioned. The 4 cyl axle is a 2 pinion and the 6 cyl is a 4 pinion. You can even use 4 cyl gears in a 6 cyl axle as long as you buy a spacer. 4 pinion is stronger but if what you have on hand is 4 cyl stuff then run it.

 

thanks guys

but if i can get a go ahead on the price then they will be mine

 

Trust me it would be ALOT easier to just get the entire front axle instead of trying to removed the carrier out of the IFS axle. You have to completely remove it from the truck to get to the "guts" of it anyway. Just 3 bolts hold it in place then connect your cv's and axle and your done