Shuddering problem

**cam man** · 09-28-2009, 09:41 AM

Your U joints are shot. Had the same problem.

**Anwazi** · 09-28-2009, 11:40 AM

I replaced them at my school with "greaseable" u-joints. the ping noise didn't go away. original u-joints were not greasable. I've noticed that all the grease shot out of the u-joints as well. anyone have any recommendations on brand of u-joints to get?

**joedude02** · 09-28-2009, 01:09 PM

Originally Posted by joedude02

i get the same shudder you describe. i too, have changed my tranny mount with an energy suspension one. i have reason to believe that this noise we share may be in the rear end ( pinion gear bearing possibly) this shuddering noise came about only after the mount change though. i also believe the possibility of it being the torque arm bushing/mount. gonna check that out later tonight. let you know what i find.

it turned out to be my u-joints. i got lucky at 120+mph it threw the u-joint cap and dugged into the yolk before coming loose. all hell broke loose with the vibrations, but i did manage to make it to my destination. had to trailer it back home though.

**Cutlass** · 09-28-2009, 06:58 PM

Originally Posted by Anwazi

i noticed it started doing this after i replaced my transmission mount with an aftermarket one. Initially i thought the aftermarket part was off so the angle of the driveshaft was, in effect, causing the vibrations.

I think that might be your answer to your vibration. Do a search on trans mounts. I've seen a few posts on them throwing the DS angles out of wack.
NAPA non-greaseable U-joints are good.

**JaycenK** · 09-28-2009, 08:47 PM

Originally Posted by Anwazi

When i removed mine. I had a hard time. I believe mine were OEM u-joints. There was actually a "wax" type material that locks the u-joints in. You have to heat it to get the wax to come out on it's own. once it reaches it's boiling point, for lack of better words, it comes out like those snake fireworks on 4th of july.

That "wax" like stuff is old yellow grease. Thats how old and crusty it was

**Cutlass** · 09-29-2009, 05:05 AM

Originally Posted by JaycenK

That "wax" like stuff is old yellow grease. Thats how old and crusty it was

No, actually OEM u-joints are held in place with injected plastic. It needs to be melted away before attempting to remove the u-joint. The replacement ones come with metal clips to hold them in place.

**Anwazi** · 09-29-2009, 08:23 AM

yeah, i think cutlass is right. it's a special wax that locks them in. the guy that helped me with them was familiar with that type u-joint. Fortunately for me!

**JaycenK** · 09-30-2009, 05:22 AM

Originally Posted by Cutlass

No, actually OEM u-joints are held in place with injected plastic. It needs to be melted away before attempting to remove the u-joint. The replacement ones come with metal clips to hold them in place.

Wow I did not know that. I always thought it was in that bad of shape LOL. thanks for the input.

**Turbo88** · 03-29-2010, 01:55 PM

Im have same problem i hear a kinda thud on hard accelartion and a vibration around 65 but only in third gear <a4> it goes away when i shift it to overdrive. I had these problems b4 i changed my trans mount and torque arm bushing. Thought it would b one or the other but it wasn't i guess i pull drive shaft and change u joints. let u know if it works 4 me

**35th-ANV-SS** · 03-29-2010, 05:11 PM

Originally Posted by Turbo88

Im have same problem i hear a kinda thud on hard accelartion and a vibration around 65 but only in third gear <a4> it goes away when i shift it to overdrive. I had these problems b4 i changed my trans mount and torque arm bushing. Thought it would b one or the other but it wasn't i guess i pull drive shaft and change u joints. let u know if it works 4 me

Where in NW IN are u?