Linusb, I remember when my rear end went out on my ford that it was leaking like crazy and had a tend any to lock up when I came to a near stop. It seems as though, after experiencing a rear end going bad, a rear end has a tendency to show signs of wear at slower speeds. And from what I've researched it seems like driveshafts vibrate at all speeds but it becomes most noticeable at higher speeds? What makes you so sure that it's a driveshaft thing? What's the difference in signs of issues between the two?
Hey Springer- with the amount of lift and description that the auto tranny is longer than manual , I was diagnosing most likely problem first.
1994 YJ Wrangler, 4.0, AX15, NP231, 35x12.50x15 BFG KM2s, 4" RC lift, 1" lift Boom Shackles, 1" BL, 4.10 gears, 8.8 LSD in rear and D30 Aussie Locker in front, on-board air conversion, Ramsey RE8000 winch.
The noise doesn't exactly come and go here and there. It's hard to explain.
The noise starts at Lower speeds like 25 mph but isn't intense. It really gets loud at 60-75 mph.
I've never tried using 4wd high on get freeway to see if it makes the noise. Are you guessing it will be louder? Or possibly go away? The tcase never made noise before I did the lift do unless the tires or driveshaft angle are putting more pressure on the tcase I don't think that would be my problem. But I may be wrong. My first suspicion would be the things that changed.
Linusb that angle finder sounds like a good idea. I didn't know they even made one. What am I looking for on a ds angle finder? What's the ratio that is appropriate? Could a suspension place do this? Would they probably charge me or is it easy?
Hotcobra03, Not sure where the 8.8 thing came from. But if you could post pics that would be great. It sounds like this will be a good learning experience for me. Thanks guys. I appreciate the site reference I'm sure that will help.
Look in literature. .jp300 Its driveshaft parts..I did these for 20 yrs.
You will see also how to check angles
Your rear to me doesnt look like 8.8..it has a jeep rear pinion yoke with straps..
Ford used ubolts or flat flange..
Books on rear are also in this link...
My son just got a 89..I will post pic of his rear shaft.. you tell me what you see wrong..it stands out
I'm on a cell as well... I feel your pain. Are you saying your sons 89 is correct and mine isn't and my problem stands out or your sons is wrong and I'm supposed to understand what's wrong from the lesson learned on his?
I'm not sure on your noise, sounds like it could be several things. Are your U joints fine?
Your pinion angle is too high for your slip yoke setup. You can go to Autozone or Napa and grab a magnetic angle finder for $5 or so. I would start with removing the shims that came on the springs.
Based on this diagram my pinion should be lower and if I had a cv driveshaft it should line up straight? Hotcobra03 is this what ur trying to say is my pinion should have a upward angle do when I hit a bump or something it flattens into the ideal did angle instead of resisting it?
Moab Trails I've done: Onion Creek, Long Canyon, Dome Plateau, Top of The World (2), Fins-N-Things (2), Poison Spider,
Golden Spike, Gold Bar Rim, Hell's Revenge (2), Baby Lion Back, Cliff Hanger, Moab Rim, Kane Creek Canyon, Strike Ravine
I got measurements 17 rear 14 did and 11 tcase yoke. From my understanding the first and last should be the same? What is the most drastic angle my ds can be at without problems?
"If your stock drive shaft is now too short, which I fear it is, the angle's on the u-joints will be more than they can handle." Jeffro06
What would you do given the angles I just posted? Am I screwed should I just get a sye and cvdriveshaft? If so should I leave the shims on the leaf springs? Or take them off and check my angles after install?