I have a 98 Ram 1500 2wd with the tow package which has a limited slip 3.55 gear ratio. I need to rebuild what I have or replace the assembly from a salvage yard due to whining/roar sounds. Trying to do some research and I am getting conflicting results about weather I can use the rear end assembly from a 4wd Ram 1500. Some people say there is a difference between the leaf spring perch height on the axle tubes. I believe I can use the rear end from years 1994-1999 with 2000 and newer 1500's using a different style pinion yoke.

 

4wd trucks get a block 2wd don't. If they are different it won't be much, take a tape measure with you so you can compare. My perches were about 1/2"-3/4" above the diff tube if that helps you at all. I still have the old ones if you need a exact number for comparison.

 

Ok thanks, yeah I will be going later this week to look at some rear ends at junkyard/craigslist and will measure then. I believe that should be the only issue if any.

 

Why not just rebuild the rear end? It could be done for around 600 bucks.. I would rather go that route than a junkyard where you have no clue what you are getting into

 

Also the shock mounts on the axle are more horizontal than the 2wd being more vertical.

 

Don't think it would matter much even if they were different.

 

If he grabs a 4wd rear end, his shocks will be compressed farther 3" up

 

Shocks on the 4x4 are longer than the 2wd. If he uses the shocks he has on his truck now, it won't matter.

 

From rockauto.com-
MONROE Part # 37103 Sensa-Trac Light Truck Rear; RWD
Compressed Length 15.500"
Extended Length 24.625"
Travel 9.125"
Parts Pack None

MONROE Part # 37105 Sensa-Trac Light Truck REAR; 4WD
Compressed Length 15.500"
Extended Length 24.625"
Travel 9.125"
Parts Pack None

 

Interesting. Would like to see some pics of the shock mounts on the 4 vs. 2 wd axles.