Mudderoy
08-12-2011, 12:37 PM
Recently I was replacing a rear transfer case seal, so with the rear drive shaft removed I decided to break out (of the package) my angle finder with magnetic base!
I checked the NP242 transfer case with 1" RC drop and it was 5 degrees. I measured this from the end of the shaft, you know where the slip yoke slides on to.
Then I measured the Chrysler 8.25 axle angle. 15 degrees! So it is pointing at the transfer case. I was really puzzled by this because that would be the drive line angle difference at 10 degrees!
I double checked my measurements and thought about how I was doing it a little, and I couldn't see how I was doing it wrong.
Later 4.3lxj (also puzzled as to how I could still have all my teeth driving with a 10 degree difference in the two drive shaft connection points) asked me to measure the angle from the filler plug on the NP242. I did and I measured, checked, and re-check, 7 to 8 degrees. It's about midway between the two.
So that means the difference is ONLY 7 degrees!!!! :timeout:
I really would like to have a smoother ride, even if my teeth aren't cracking and falling out. Also no telling what damage I am doing to u-joints. I should have checked this much sooner. I just assumed the angle must be fine because it wasn't vibrating like driving over a washboard.
After contacting RC I found that the leaf springs came with 3 degree shims. So if I get a set of 6 degree shims that should put me at 9 degrees and 8 degrees.
I checked the NP242 transfer case with 1" RC drop and it was 5 degrees. I measured this from the end of the shaft, you know where the slip yoke slides on to.
Then I measured the Chrysler 8.25 axle angle. 15 degrees! So it is pointing at the transfer case. I was really puzzled by this because that would be the drive line angle difference at 10 degrees!
I double checked my measurements and thought about how I was doing it a little, and I couldn't see how I was doing it wrong.
Later 4.3lxj (also puzzled as to how I could still have all my teeth driving with a 10 degree difference in the two drive shaft connection points) asked me to measure the angle from the filler plug on the NP242. I did and I measured, checked, and re-check, 7 to 8 degrees. It's about midway between the two.
So that means the difference is ONLY 7 degrees!!!! :timeout:
I really would like to have a smoother ride, even if my teeth aren't cracking and falling out. Also no telling what damage I am doing to u-joints. I should have checked this much sooner. I just assumed the angle must be fine because it wasn't vibrating like driving over a washboard.
After contacting RC I found that the leaf springs came with 3 degree shims. So if I get a set of 6 degree shims that should put me at 9 degrees and 8 degrees.