clunk!!

[mikencoleen]

I have a 2004 SD.can't figure out where a small clunk feeling is coming from when I first take off from a complete stop. You can feel it just when the truck is starting to move from a stop, like there is something loose and taking up some slack. I can only feel this and not hear anything. Don't know if it is happening in the tranny, the front end, etc. Would like to know if anyone has an idea about what this could be and if it is anything to worry about. Just started feeling this about 2-3 weeks ago.

 

[F350DRW1]

Slack in the rear end gears is a possibilty.

 

[Tail_Gunner]

Sounds like the "slip joint in the driveshaft needs lube" thunk.

In the drive shaft there is a slip joint inside of a rubber boot. Near it you'll see a grease gun fitting. Grease it up until you see the rubber boot swell slighlty. I think you'll find your "thunk" goes away.

 

[zr1pete]

This is straight from Ford, Maybe It's what's happening to your truck.
Hopes this helps....... BTW I have it in my truck too.


Clunk or Pop from TorqShift at 2-3 MPH, 2003-07:
A clunk or pop may be heard or felt on drive away after starting the engine, backing up and shifting to drive, usually around 2-3 MPH. This condition may be intermittent. It is the result of normal backlash (movement) between the splines on the low/reverse one-way clutch. Broadcast Message 5904

 

[haulin8or]

My 04 Excursion does this too. Now I know what it is. Has done it since I bought it. Thanks for the info!

 

[mikencoleen]

thanks everyone. I feel a lot more comfortable about this now. Appreciate everyones help.

 

[JLDickmon]

OK.
Here's what I want you to do.

Get underneath the truck, and look at the u-joint caps in the rear yoke, and in the yoke by the center support bearing.

Unless I miss my guess (which I sometimes do), there's going to be a shiny ring around the caps where they're walking around in the yokes.

Look for this first, before you have your "Oh Crap!" moment.

If you see them, tell me/us.

If you don't, then forget I said anything at all about it, and lube the snot out of the slip yoke.