2007 f150 supercrew 4x4 shutters when turning. Changed rearend fluid but didn't help. I think I need to change out the clutch pack. Anyone know a good shop in the Cypress, TX area that can do this work?

 

Did you add a bottle of friction modifier? Did you use 75W140 full synthetic?

 

don't forget to do your figure 8's after adding the modifier.

 

Tell us more. It wasn't in 4 wheel drive was it?

 

Yes. About 5 days ago.

 

No. Was not in 4x4.

 

Some 9.75" axles need 2 bottles of modifier. Wouldn't hurt to add another one.

 

^^^ yup......
i just replaced both axles and bearings in mine and could tell IMMEDIATELY the new axles were going to make the posi TIGHT. I put in 2 bottles and still get a LITTLE shimmy if I accelerate with a tight turn...not enough to concern me but also not "smooth as silk"