I had my FRPP 4.10 gears installed about two weeks ago. For the past week or so my car seems to be affected by the TSB 06-12-11-limited axle moan/groan during low speed turning manuvers. Is it just a coincidence or is it related to the gear install?

 

Did the gear installer put in Limit Slip Friction Modifier? Failure to do so can cause similar symptoms.

 

I had a performance shop do the install. He did put in a friction modifier.

 

I had the shop add more friction modifier. He did it for free. If in a week or so the sound comes back, he said to bring it back in and they will use ford brand friction modifier. Regarding the TSB, I already had the 06-12-11 done about 4-5 mths ago. I knew had one of the TSBs done for the rear axle moan and groan.