Driveline Vibration driving me crazy!!!
08-10-2010, 03:57 PM
#21
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08-10-2010, 06:08 PM
#22
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The best way to check the u-joints is to pull the driveline down and rotate the joint around feeling for stiffness and roughness of movement. Might just have to break down and do that, Alan. I know.......what fun, eh? 
You probably know this, but if the needle bearings are toast, no amount of grease will make them float smooth again.
You probably know this, but if the needle bearings are toast, no amount of grease will make them float smooth again.
08-10-2010, 06:17 PM
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Ya it was the trans. I swapped it out and all good. Input bearing was getting sloppy.
Yours sounds like something else though because if I let off the throttle or coast it would stop. Only vibrate under light load at highway speed.
Check your cross-member mount. I had a 4runner that would get a vibration like you describe and it was the rubber in the mount had pulled away from the steel.
Yours sounds like something else though because if I let off the throttle or coast it would stop. Only vibrate under light load at highway speed.
Check your cross-member mount. I had a 4runner that would get a vibration like you describe and it was the rubber in the mount had pulled away from the steel.
08-10-2010, 07:26 PM
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The best way to check the u-joints is to pull the driveline down and rotate the joint around feeling for stiffness and roughness of movement. Might just have to break down and do that, Alan. I know.......what fun, eh? You probably know this, but if the needle bearings are toast, no amount of grease will make them float smooth again.
You probably know this, but if the needle bearings are toast, no amount of grease will make them float smooth again. I'll break it down and check them out. I hate changing U joints. I usually loose my religion. HAHAYa it was the trans. I swapped it out and all good. Input bearing was getting sloppy.
Yours sounds like something else though because if I let off the throttle or coast it would stop. Only vibrate under light load at highway speed.
Check your cross-member mount. I had a 4runner that would get a vibration like you describe and it was the rubber in the mount had pulled away from the steel.
Yours sounds like something else though because if I let off the throttle or coast it would stop. Only vibrate under light load at highway speed.
Check your cross-member mount. I had a 4runner that would get a vibration like you describe and it was the rubber in the mount had pulled away from the steel.
08-11-2010, 08:57 AM
#26
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OK pulled the drive shaft and checked the U joints. Everything is tight and smooth. The drive shaft looks to be in phase. Over the years during maintenance someone marked the drive shaft to flange with a punch mark and all is still lined up. I want to drain and refill the tranny and xfer case. BTW I installed locking hubs on the front about a month ago so I can disengage the front. So that won't be a factor.
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