I recently had 4.56 gears installed. About 2 weeks after they were installed I started to get a shutter when turning at low speed, which I am familiar with as my 2004 had the clutch packs replaced.
Last week I stopped by and they added more friction modifier which did not change anything.
Yesterday they replaced the lube/friction modifier and it is still the same.
Is there anything they could have done to the clutch pack during the install process?
Do the 2006's have the clutch pack issue the previous models had?
Thanks in advance.

 

Sorry but I have no further advice for you. I thought you'd like to hear that.

 

I pesonally have the stock shudder, and was hoping a diff fluid change would help, but from what you said it might not. I was unsure if i submerged my diff once or not.

My question would be, is the shudder damaging anything? Kind of sounds like it has to be wearing on the clutch packs or something. I'm concerend myself about cooking something until it seizes.

-ii

 

ya. i just put 4:10s in mine and now i have a shudder. i have changed the fluid about 5 times since and so far the best improvement has been with motorcraft 75-140 synthetic with 2 bottles of friction modifier. the shudder is still barely there though, so i might try a half bottle more. seems like the more miles i put on the new oil the better it gets. ill probably wait a couple hundred more miles before trying the half bottle more.

 

I had the same problem, 3.73 limited slip. I stopped by the dealer & the salesman gave me a bottle of the friction modifier. I put it in; waited a week, and still had the shudder. I figured i needed to schedule an appoitment with the dealer & take my truck in. I fooled around and forgot about it.....3-4 weeks later (and about 2,500 miles) the shudder was completely gone. It's a good thing i'm such a procrastinator. lol. You might want to try and wait a little while and see if the additive helps. I'm not sure if it could mess anything up by waiting though. I hope not, cause i did.