Join Date: Oct 2001
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CJ--Driveline angles with approx 2.5\" spring lift?
Okay, I have a vibration in my drivetrain. Neither I nor my father (over 40 years experience as a mechanic) can find the little beggar. It feels like the rear driveline or rearend. Shifting the transfer case into 2hi, 4hi or 4lo makes no difference. It happens in all gears. We tore the rearend down today (factory D44 trac loc 3.73 in a '74 CJ5), only thing we found that looked questionable was that we had the bearings on the ring gear a hair too tight--we removed a shim and put everything back together--and it still has the vibration. We tried putting the jeep on jackstands, and placed a hydraulic jack under the front of the diff. We put it in gear, and then lifted up on the jack...the vibration lessened. We are thinking that possibly we need to rethink the angle on the pinion shaft. Before we go crazy and start playing with shims, does anyone know what the angle was from the factory? And was it measured off the frame? Ground? or???? I'm running 33" tires and the lift is re-arched springs with an add-a-leaf for a total lift of approx 2.5". I'm not overly sharp on driveline angles, so any advice (heck or any advice on something I might have overlooked on the vibration!) would be greatly appreciated.