Indexing pinion angle
ww2steel
Jeeper
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- Location
- Richmond, VA
- Vehicle(s)
- 1982 CJ5 w/ 360ci V8, T-176, original Dana 300 case, wide axles - Dana 30 & AMC 20. Was my 1st vehicle. I sold it in 1997, but 13 years later tracked it down on Carfax and bought it back! 1980 CJ5, 304, TF999, Dana 300. (Also a 1979 K20 undergoing a frame off... conversion.)
Hello. I am just finishing up a spring over axle (SOA) conversion. Front is done. I am tweaking ride height by adjusting rear shackle height. Once done with that I can index the pinion. Rear shaft is a double cardan (both are, actually). Current angles are 29° at the Transfer Case (double cardan end), and 24° at the pinion. (Also, it's now a T-176 , the TF999 Transmission has been swapped back out.)
1) I read that the single joint end of a double cardan is supposed to be run at 0° since there is no opposing joint to cancel out vibration, correct?
2) To accomplish that I will have to tip the pinion up about 24° (after shackle adjustments, running about 1.7° down angle at rest to account for torque). Will running the pinion tipped up like this cause problems? The only things I can think of are possible difficulty bleeding the wheel cylinders (so do on a slope), and possible lubrication issues of the pinion bearings. Am I going to lunch the bearings if I tip it up that far? (Tipping the pinion up will also help the Transfer Case angle.)
3) I also read that running a U-joint at 0° causes brinelling to the needle bearings and races since they don't move/ lubricate. Understanding that I probably will be a degree or two off anyway just because of everything involved- is this something I should worry about? Should I plan to run it at 1-2°?
Thanks,
Mike
1) I read that the single joint end of a double cardan is supposed to be run at 0° since there is no opposing joint to cancel out vibration, correct?
2) To accomplish that I will have to tip the pinion up about 24° (after shackle adjustments, running about 1.7° down angle at rest to account for torque). Will running the pinion tipped up like this cause problems? The only things I can think of are possible difficulty bleeding the wheel cylinders (so do on a slope), and possible lubrication issues of the pinion bearings. Am I going to lunch the bearings if I tip it up that far? (Tipping the pinion up will also help the Transfer Case angle.)
3) I also read that running a U-joint at 0° causes brinelling to the needle bearings and races since they don't move/ lubricate. Understanding that I probably will be a degree or two off anyway just because of everything involved- is this something I should worry about? Should I plan to run it at 1-2°?
Thanks,
Mike