Groverboy

The rear end of the truck lets out a clunk just as the veh comes to a stop and sometimes when accelerating at a stop. Any ideas

FordService

I'm happy to assist, Groverboy. Please fill me in with the current mileage on your truck, as well as whether or not you've addressed this concern with the dealership yet; I'll research available options.

Brittany

Russ103

2-1 shift or 1-2 shift on slow take off. My 2010 with 170k miles on it has done that for as long as I remember. I wouldn't worry about it personally.

I did have my tranny reflashed by a tech at the dealer after experiencing the violent downshift from 6th gear when stepping on the gas. Reflash worked like a charm and it's been great since.

gDMJoe

Why multiple posts for the same subject?



Contact an admin' and get one
.

Danager

Mine was acting in a similar way, it later went on to form a slight shudder while turning. It turned out to be the pinion seal, and clutch pack. Replaced under warranty, twice now in the past 12 months...

tcp2

Your driveshaft slip yoke needs some Teflon grease.


https://www.f150forum.com/f38/drive-line-clunk-70900/