I have a 2007 F150 5.4L and whenever I am at a dead stop and accelerate I hear and feel a grab or clunk in the truck?

I do not think it is transmission related as this trans was just rebuilt and the truck shifts perfectly.

Driveshaft maybe? Anyone have anything like this in the past? Really annoying lol.

 

That would be the slip yoke. It is really annoying but a lot of Ford trucks do it (including mine).

 

How hard of a fix is that? Feel like I am killing my truck lol

 

Easy. Four bolts to disconnect the flange yoke from the pinion at the rear differential, then slide the slip yoke out of the transmission. Grease the splines of it with lithium grease and your finger, slide it back onto the output shaft and into the transmission, four bolts to put the flange yoke back onto the pinion. Less than a half hour. Just do NOT drop the drive shaft or you'll throw it off balance.

 

I'll give it a shot! Thank you!

 

Make sure to mark the connections so you get everything lined back up correctly.