Vibration at 60mph, wierd things happen at that speed
hello i ahve a 89 yj. and i get a vibration at 60mph+. i jacked up the rear of the truck and put it in gear and get it up to 60mph. when this happens and i look under the truck. For some stange reason the frnt driveshaft begins to spin witch i believe is causseing my vibration. any idea on this??
02-05-2011 07:42 AM
Look at the u-joints first. If they are worn, it can cause vibration. Simple to drop the rear driveshaft and replace the u-joints (remember to mark the position on the shaft and transfercase output to make reinstalling easy).
As to the front driveshaft spinning, you don't say if it's a slow rotation or actually under power. If it's a slow rotation, it's just caused by the vibration of everything else. If the front driveshaft is engaging, you have other problems.
02-05-2011 03:26 PM
well it appears to be spinning relatively fast, when the rear tires are off the ground there is 0 vibration. I was kinda nervous to grab a driveshaft spinning when i wasnt sure of its speed
i removed the shaft to change the universals. and when i was removing i realized that the universal on the rear end is hitting the bolts that holds the straps witch hold the universal
02-13-2011 01:23 PM
Way too much of an angle..
02-13-2011 01:26 PM
thats what i was thinking. So should i just take out the shims. Those are the shims that came with the leaf springs(built in) and it used to be fine. But i dont know what recently happened where it got wurse
02-13-2011 01:31 PM
remember what i said about an angle locator?:facepalm:
02-13-2011 01:34 PM
my only prob is It wasnt like that when i did the springs. Is it possible that the center housing spun itself upwards and the axles stayed in the same spot or something like that. Im like 90% it wasnt like that be4 i want rock crawling