Mj Axle Into Xj

[Alex V.]

I know this question has been asked many times before, but here it is again:

Will the 2WD front axle out of my '90 MJ bolt right into an '84 4WD XJ? If at all possible I plan to use the XJ control arms, springs, shocks, and track bar, but leave the MJ tie rods on the 2WD axle. And will the XJ brake calipers work on the MJ rotors (or will the XJ rotors fit on the MJ hubs), so I don't have to unhook/swap the calipers between the two?

And as to why I'm doing this - I need to keep the XJ on the road while I'm rebuilding the live front axle.

 

Thanks!

[Eagle]

The axle itself will bolt right in. Just pop the draglink loose at the pitman arm, pop the track bar,  and move everything over. The control arms are the same for all years of the XJ and MJ, so you can either leave them in the vehicles, or move them with the axle.

 

I'm not certain, but I DON'T think the calipers are the same. I think you'll have to use the 2WD calipers on the 2WD axle. Jeep changed the calipers beginning with 1990.

[Geonovast]

The 2wd calipers are different for the years where the 2wd beam axles used the bearing/rotor/spindle setup, which I believe was 87-94ish.

 

You'll need to keep the calipers from the 2wd axle.