30 mph + vibration

[DNGPYL]

Hey all, bought a 00 Expy with 99K miles and all was great till today. Hooked up the snowmachine trailer for the first time today and I get the vibe at 30 plus. I detached said trailer and the vibration went away. I am thinking u-joints and hoping it's not a tranny/tc problem. Opinions?

I cannot detect any vibration while coasting or acceleration w/o the trailer. BTW, no ice in Expy or trailer wheels, I have towed the trailer many times and all was smooth.

thank, Joe

 

[Knautical2001]

I would think that you would still feel the tranny even without the trailer. So I am going to have to lean towards the U-joints. But I am not 100% about that. I am not a mechanic. LOL Good luck though. I wish the best for you. BTW, your signature is funny as hell. LOL

 

[alaskanexpy]

does sound like a possible ujoint issue. how heavy of a trailer?

what part of the state you in?

 

[DNGPYL]

Thanks for the replies!

Trailer and tools not even 1000 lbs. I am in Los Anchorage.

 

[DNGPYL]

I replaced the rear u joints and the problem is still there but it vibrates most at 45 to 55.

Pulled the front shaft out and had no change.

I am feeling it mostly in the steering wheel and only when towing the small trailer.

Lifted the front wheels and the bearings feel good.

Now what?