View Full Version : 8.8diff

09-02-2008, 10:56 PM
got a 92 yj,dana rear is crapped out.I have 8.8ford posi,disc rearend.Is axle tube same diameter,or do i need to buy new u-bolts?Also what bout hookn up to ax5 manual trans?Am i able to keep slip yoke style to adapter?can i use ford shock/u-bolt mounting plates?How the fu*k do u determine rear axle ratio off tag?Thanks for info never done this before so any tech advice is appreciated..Also the rear end came with unknown man.trans that was hooked up to chev small blk,how to identify??thanks:rockhorns: :rockhorns: [cheers]

09-02-2008, 11:14 PM
p.s Mr vic u out there, iknow u have done this b4. If your into a little helping mood i could pay you

09-03-2008, 03:46 PM
Some good information here ...


and here ...


Read the shit out of that stuff because although it is a fairly easy swap, there are a handful of things that need to be addressed ranging from u-bolts, mounts and u-joint flange adapter, to possibly a new drive shaft and SYE kit. Tranny has no real impact on it. Of course the gear ratios front to back need to match as well to use 4wd. Also you will need to look at e-brake lines - I am not certain your stock YJ cables will work. I know my XJs don't and I'm looking at either custom lines or making cables from a ZJ fit.

I'm throwing an 8.8 into my XJ this fall and have a list of crap to purchase / make first.

Also if you sign up on bcjeepclub.ca there are a few members over there that have done the swap into a YJ and can probably give you some good advice.

Good luck with your project.

Mr Vic
09-03-2008, 06:46 PM
the first link Lornix posted has good info and it helped me out.

i bought the kit from MORE offroad for the 8.8, and ordered the e brake cables. kit came with new ubolts, plates and perches and shock mounts. didnt end up using the shock mounts with the kit. i think it was around $250 delivered to my door. the e brake cable kit is nice, no hassles with it whatsoever. the sping perches, plates and u bolts can be had for cheaper buy sourcing locally. for shock mounts on the axle, used tab like this , simple and strong.


8.8 axle tube is a bit larger diameter than the d35, so have to get new ubolts for it. you can keep the slip yoke driveshaft but may need to shorten it.. not sure on the difference with pinion length and angle between the 2 diffs, but i beleive the 8.8 is longer. also the flange on the ford 8.8 adds length. Nutbar is the most knowledgebale Jeep guy out there, he may reply with more info.

i did have to make new hard lines for the rear disk brakes. was simple and easy.

oh and weld the tubes to the center section.

picture of my setup


09-03-2008, 07:12 PM
That anti-wrap bar looks pretty trick. Haven't seen one like that before. What kind is it and how does it compare to the old fashioned 2-bar solid triangle set up? Does it use the shackle at the front mount point too?

Mr Vic
09-03-2008, 07:43 PM
the anti wrap bar is very slick indeed, Jeep thrills customs, built and installed it. Nutbar has similar setup in his jeep. I dont have enough experience to compare to other setups but i would imagine that this design is considerably stronger and allows for the most flex using the RE joints, and yes has shackle on the front too.

another picture

09-03-2008, 09:37 PM
nice setup,my rearend already has the factory torsion bar welded up,when i pulled 8.8 from other jeep.they also used factory shhock mount plates.thanks 4 all the info

09-03-2008, 10:38 PM
We usually have most of the parts that you need for this swap in stock at Jeap Thrills.

the axle tubes are much larger in diameter than the D35 so you will need larger U bolts, and larger spaced U bolt plates,

the 8.8 is slightly longer from axle center to the pinion flange than the 35 but I have never run into an issue using the original length drive shaft.

we usually stock the pinion flange you need to keep the stock jeep U joint we also stock the spring perches and shock mounts

for the E brake cables . . . if it is drum brakes the stock Jeep ones will work no modifications if it is disc brake we still use the stock jeep cables but we cut off the very end of the arm inside the drum that the cable attaches to and weld it on the end of the actuator arm on the 8.8 to make getting new cables easy when you need them.

for the flex hoses to the calipers get 2 of the right side caliper hoses then you can still use the Jeep drop flex hose from the frame to the diff.

as far as the unknown tranny . . . PICS???

09-10-2008, 11:20 PM
hey thxs nutbar will post some pics asap[cheers]

09-21-2008, 07:14 PM
here are pics of unknown tranny?It was hooked up to 350 chev,tranfer case is a np231 with yoke elim. conversion.There up for sale call me@604-315-4869 http://i458.photobucket.com/albums/qq308/davey73_2008/jeep003.jpg




09-22-2008, 09:44 PM
wat is it????

09-22-2008, 10:50 PM
do u know if that sye will fit a tj???

Mr Vic
09-27-2008, 06:26 PM
looks like nv4500 5 sp trans to me, definetly worth a few hundred bucks, and should have an aftermarket adpater or input shaft to mate the jeep t case to the transmission

09-27-2008, 06:49 PM
if yah dont use the 8.8 ill take it........

Mr Vic
09-27-2008, 08:30 PM
if yah dont use the 8.8 ill take it........

he already got it installed into his jeep

09-30-2008, 10:08 PM
not sure if it will fit in tj??any out there know??it is 4 sale$$$$$$$$

10-06-2008, 10:22 PM
come on lets cee some ofer$$$$$$$

10-08-2008, 12:21 PM
There ain't no SYE on that t-case. If that is a nv 4500 I'll take it!