I've started to notice an intermittent thunk coming from the front of my Supercrew. It does "sometimes" when I'm stopped at a light as I take my foot off the break and press the accelerator.

I think I've noticed it when I put it into reverse but that could have just been my imagination.

On all 4's everything is tight, with no slop. I'm thinking either breaks or a CV. There is no Shimmy or shake at any 0-75MPH. (As fast as I've ever needed it to go.)

There is no loss of power or engine issues.


I'll update the thread when I take it apart to inspect. Do any of you truck guys know the sound or reminded of a common problem that this sounds like?

Thanks,
Nerd

 

Does it stop when you touch the brakes?

 

It only thunks once on take off.

 

To honest, I'm having the same issue with mine. So, I would like to know also. If thats the case, I'd be leaning more towards CV axles. I just recently put new pads and rotors on mine.

 

Sounds like age old ujoint think or possibly something in your rear end. My 91 trooper beater does the same thig and my dad says its worn parts in the diff

 

slip joint? I had this issue with my old F150. I just lubed it and it stopped.

 

Doubt its the u joint. It sounds more suspension based on where it's coming from. I hear it around the strut tower. Something like that.

 

I have a similar issue, if not the exact same thing. I replaced the u joints on my rear driveshaft a few weekends ago thinking that would solve the problem...it didn't. IIRC, I lubed the front driveshaft yoke a while back while working on another project, and I think that took care of the sound for a while.

 

I am talking about the male and female portions of the front driveshaft yoke, as pictured:

 

Would that certain part be different if it were 2wd? I noticed yours is a 4wd.