I recently bought a rear disc swap from a ZJ for my 94 cherokee with 8.25. I am right now trying to place the backing plate onto the axle..and only 2 of the holes that the bolts go in, line up!? What does this mean? In the write ups there was nothing written about drilling out the holes for the 4 bolts to go in?

Please help!

 

What year ZJ parts are you using?

 

The backing plate has to be redrilled.

 

X2^^^This is not a bolt on mod. IIRC, even with the 2 bolts in place that will fit, the backing plate would not be centered. I think all 4 holes need redrilling, in order to center the BP.

 

Edit: replaced with correct link.


http://www.pirate4x4.com/tech/billav...kes/index.html

 

Besides redrilling the backing plate,you will also need to have two spacers either made or you can buy them from teraflex for about $15,they take up the space you loose from the old backing plate,the spacers maintain preload on the bearing seals,you will need to r&r the bearings to install the spacers.

 

TJ D44 retainers work well. They'll need to be redrilled as well.
About $11 each from the dealer.

 

Your axel is not a Chrysler 8.25" if the 4 mounting holes don't line up. If it were an 8.25 all you would have to do is open the center bore. It's most likely a Dana 35 so you need to reference the write-up for that axel. Post a picture if you would like clarification.
Mike

 

X2 you beat me to it. it is "almost" a bolt on mod if you have a 8.25, with just a little grinding on the center.

http://home.swbell.net/rriojas3/reardisk.html