I'm gonna disagree with the rest of these guys. I put the 4 inch lift in my 89 RC and had to put a 6 degree shim in the front in order for the front driveshaft not to bind, and put a 4 degree shim in the rear, and even with that I knock out my u-joint on the transfer case in a little over 2000 miles. All u-joints are brand new, the springs are correct and were installed correctly. I have no idea why some ramchargers are different than others, but there seems to be some variance in the way the lift affects driveline angle on different vehicles.
Just did the 4" rough contry on the '89 RamCharger, and had to grind the front-end u-joint / driveshaft yokes. I put the shim in the front, and none in the rear. Runs nice, but i do seem to have a bit of a vibration above 55... When i put the shim in the front, i went for more caster. I wonder if that was wrong?
The thing with the shims in front is that it messes up your steering geomety. A couple of degrees in the shims doesn't seem like it would make much of a difference, but it does. See when your axle is unshimmed the steering can go a true side to side like it is supposed to and it pivots on the bottom of the tire. But when its shimmed, the pinion is rotated up along with the rest of the axle. So when you turn your wheels they aren't pivoting on the bottom of the tire, its actually up higher on the tire, causeing more wear. A couple of degrees in the shims isn't going to make a whole lot of difference, but when you start getting anything above 2-3 degrees, thats when you start running into those problems.
Thanks for the heads up on the front. I was going to get some for the front. I checked it at about 10mph and the 4x4 seemed to work fine. I don't really go off road and the 4x4 is only used ocassionally so I'll probably leave the front as is. I found a set of 6 degree wedges for $16. I'll probably start with the Ujoints and see what that does as I am sure they could use replacing.
One thing I forgot about that hasn't been mentioned yet is try rotaing your driveshafts 180 degrees. Unbolt and rotate them. They come from the factory a certain way because of the vibs, so when you reinstall them usually they don't get back in in the correct orientation. I had that prob with mine on the front. It vibrated so bad that it broke the caps off of the u joint.
1 - 11 of 11 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
RamchargerCentral.Com is a Dodge truck community built by a vast number of experienced owners. Whatever you're thinking about doing from routine maintenance to full-on restoration, odds are somebody around here already has. Originally focused on the Ram Charger / Trail Duster, our members own, drive and wrench on Mopars from the 40s to the current day. It's not what you buy, it's what you build.