2nd Gen Non-Engine/Transmission shudder ar rear wheels.....maybe?

[Wyomingcowboy]

I have a little shudder somewhere between the transmission and rear wheels that has recently developed. It is only between 20 and 30 mph, and only then when I'm in the throttle. If i push the clutch in or let off to coast it will stop.



I hoped it was a bad shock that was obviously bad but after replacing the rear set it is still there. I first noticed it when it was -20 outside and had hoped it was ice or maybe mud throwing the wheel balance off but after parking inside for days and checking the wheels I am sure that possibility has been eliminated. I also replaced brakes all the way around with new rotors on the rear (including park brake shoes) and the shudder is still there.



I should also say that I replaced the clutch this summer and have a few thousand miles on it. This shudder didn't start immediately though.



What are your thoughts?

 

[Wyomingcowboy]

U joints are all tight still.

It also doesn't matter if it's 3rd or 4th gear... . same symptoms.

 

[HHhuntitall]

Is it leaking fluid from the T-case output shaft?

 

[NIsaacs]

Sounds like u-joints, if they are dry, they will bind and cause the issue you describe.



Nick

 

[mfurrh55]

I had the same problem, thought it was my u-joints, checked them and they seemed tight, was gonna replace my carrier bearing, bought me a new carrier for 135. 00, the shop foreman told me to go home and remove my rear driveline and make sure the bearings were good, He said sometimes you think they are good until you remove it and wiggle it back and forth, i did what he asked, and one of the bearings locked right up, anyway my problem turned out to be the rear joints, at 60,000 miles my bearings were all rusted up like they were put in without any grease, and at 100,000 miles i had to put in a second set, this time i put greaseable one in, anyway check first see what happens, Monte

 

[Wyomingcowboy]

I'll check the bearings and u joints again. There is no fluid leak and levels are all ok.

 

[Wyomingcowboy]

My mistake..... the u-joint near the carrier bearing is def bad. I dont know how/why but it is shot. All joints have only about 60k on them... . Maybe I'll go ahead and replace them all again?

 

[HHhuntitall]

Hmm, well, there are still several things aside the obvious U-joints and carrier bearing. If you hit something, you could have lost a weight off your driveshaft. I've seen harmonic dampener weights lose the rubber inner attachement and begin to cause a vibration from lack of balance. Those are usually mounted on the front of the driveshaft, right behind the T-case..... I've also seen the tailhousing bushings get worn so bad they allow the output yoke to wear on the output shaft and cause it to bind up, although it almost always knocks the output shaft seal out..... Then there's the possibility of a bad pinion bearing or bent axleshaft, although I'd think either would do it at all times, instead of just under a load.....

 

[Wyomingcowboy]

I'll get the joints replaced early next week and see how it goes.....

 

[Wyomingcowboy]

Problem fixed! Now to focus on other things.....

 

[bry1216]

How many miles on the u-joint?