I drove up to the mountains a few weeks ago and sheared my automatic hubs trying to rock myself out of a snow back that I got stuck in. Ever since then my truck has been shaking at speeds between 35 and 70mph. It's not teeth chattering like the washboard effect some people get; it feels more like slight imperfections in the road. Feels sort of like an out of balance tire, but I have had the truck in twice to get the tires balanced in the past weeks. The vibration seems to be coming from the drivetrain as I feel it more under my *** than in the steering wheel. I have since replaced the hubs with Warn premium manuals, replaced the fluid in both differentials, and checked the u-joints by twisting the driveshaft around them looking for play -- none. Any ideas?

-Chris

 

Any help here guys?

 

Try Sea Foam tranny treatment first, cause it is the cheap fix.

Then try replacing the filter.

Then if that does not work, have a mechanic check for torq chatter.

-Vycan

 

Thanks for the reply.

As for the tranny fix fluid, I already have Dr Tranny Shudder Fixx running through the tranny right now from when I was trying to fix a different shudder I had before, due to a carrier bearing needing to be shimmed (fixed it). In light of this I don't want to add anymore friction modifiers or quick fixes, nor do I think that they would help since the first one isn't doing much in there.

As for the filter: I just changed the filter and fluid to Amsoil synthetic about 1-2 months ago, so that wouldn't be the source of my problem.

I guess I'll have to take it in to be looked at... Somehow I don't think its transmission related because the shake seems to continue after I put the tranny in neutral and coast down a hill. Thanks for the tip. Still looking for suggestions.

-Chris

 

I am having a similar issue. You can watch my thread if you'd like here:

http://www.f150online.net/forums/sho...d.php?t=276763

Btw where are you getting into snow at?

I use to live in Marin, boy do it miss it!