The housing are almost completely identical. Size wise the only major difference was the longer pinion. The axle tubes were all the same size, and I think the pumpkin was even the same, but my calipers aren't that big.
Is it a real easy mod. The crossmember and mounts are all the same. Those can swap right over or you can use the ones from the new axle.
The halfshaft, and cv's are different so you need those from the new axle. Also when you get it all installed you will need to do some custom work on the driveshaft.
The shaft from the 3.5 has the wrong slip yoke, and large u-joints. I think the flanges look to be the same on the diff side. Your old one can just be cut down and re-tubed, because it is now to long.
I was very happy to find that the CAD vac plunger was also the same. I snapped the hose nipple off the plastic end cap in installation. But it is a two piece shaft held together by a pin and a collar. I was very luck because I was able to use the one off my old axle, and install it without taking the larger diff down again. it was enough of a pain in the ass getting it up in the first place.
Now I need to get the drive shaft done, a compressor sourced, and a new knuckle bearing sourced so I can install the cv's. But it is well on its way!!!
