ToughFX4

From a complete stop i give it gas and the truck shifts and i feel and kinda hear a bang noise from the rear end,kinda like second gear is slamming in.It does it only 50% of the time.Any ideas on what it might be.Thanks

jbhill

Torque converter

13EcoScrew

I get a similar bang sometimes when it kicks down into 2nd accelerating out of corners ect.

fordjamie

I had a similar issue with my 2005 it ended up being the slip yoak in the rear end

ToughFX4

My does it out of corners also,have you had it looked at?

ToughFX4

Do you remember what it cost you?

13EcoScrew

No, I have only had the truck for 3 months and it doesn't do it enough to make me look into it deeper.

Fx4_04

Add friction modifier to the rear end mine would do the same thing and shudder going up a hill at times. A 7 dollar bottle of friction modifier in the differential took care of mine ( tsb from ford about this also. Im a ford mechanic)

fordjamie

They just greased the slip yoak. At the time it was under warranty. But it took them like 30 min. To pull the diff cover grease it reinstall and fill. I am guessing you will be like a 100 bucks. If that is your issue it is a pretty easy thing to do.