The Mud Pit > Wrenching
'87 YJ Build
One-Eye:
I think that might be it. Just have to tighten everything down and try but initiall test run was good. No bad noises. Drove it like 5 miles today just to stretch her legs.
One-Eye:
So the T-Case works just fine. Everything goes the way it should. I also fixed 4-low (because it didn't work before). Internal setting was FUBARed. Now, I do have a pretty significant vibration when slowing down. It happens a little bit when I get off the gas (from higher speeds) but when I get on the brakes it starts to vibrate pretty good until I am doing like 20 miles/hr. The only work I did on the brakes was the brake lines themselves. Didn't touch calipers or drums. I will try to bleed them again just to see if there is anymore air in the lines but I don't think it will make it shake the way it does. If anyone has any insight to this I am dying to hear about it. YJ's unit!!! I can't be the only one that has had this problem...can I? Thanks in advance.
One-Eye
calvynandhobbs:
The last time I can think of something like that happening to me was when I had my CJ7. It was the rear driveshaft. When accelerating everything stayed tight, but when I let go of the gas it would create a void in pressure and the ujoint was vibrating. It was shot and after doing this for about 3 weeks the ujoint gave up the ghost and the rear driveshaft fell out on me while driving it.
One-Eye:
So did you need a longer drive shaft to fix the issue or was it just a bad U-joint? The U-joints that I have are brand new so hopefully it ins't that but then again they are cheap so maybe it is better that it is a U-joint. Now that being said I did notice that when the Jeep is given a little bit a gas (or I guess a lot) the rear axel torques a little bit. Wonder if that is what is making it do that? When I get off the gas the axel rolls back down causing the vibration. Wonder how to stop that. What you said sounds a lot like what is happening though. Thank you. God does it feel good to driver her though.
gearhead1985B:
--- Quote from: One-Eye on August 21, 2012, 03:58:37 AM ---So did you need a longer drive shaft to fix the issue or was it just a bad U-joint? The U-joints that I have are brand new so hopefully it isn't that but then again they are cheap so maybe it is better that it is a U-joint. Now that being said I did notice that when the Jeep is given a little bit a gas (or I guess a lot) the rear axle torques a little bit. Wonder if that is what is making it do that? When I get off the gas the axle rolls back down causing the vibration. Wonder how to stop that. What you said sounds a lot like what is happening though. Thank you. God does it feel good to driver her though.
--- End quote ---
what are your angles on your pinion yoke drive shaft and t case yoke/output? (f-ed up angles are the main cause of drive line vibes)
and you have axle wrap it is accepted as a normal thing that happens on a lifted leaf sprung jeep and it will get worse when you are in low range the only way to totaly cure axle wrap is an anti wrap bar but check your leaf spring u bolt torque i tighten the as tight as i can get them with a 3' breaker bar (about 200 ft-lbs) with used u bolts i have seen that cure mild axle wrap an a cj
what i see happening is when you are on the gas normally the pinion wraps up slightly (probably less than 5 degrees) putting your u-joint angles in a happy place and when you let off the gas the axle wrap goes away making the u-joint angles unhappy and it vibes i know on mine the vibes are worse on deceleration than acceleration
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version