I've redone my rearend 4 times already but i'm still getting a whine in my 8.6 rear end i went from 3.42 to 3.90. Can anyone tell me howmuch shim i should go with. I think everyway i go will make it whine but.

 

My Richmond 3.90's howled like a wolf at about 55-65 MPH. Just get used to it. The Richmonds are prone to whining a bit. I know others have said their Richmonds didn't, but most do.

 

so your saying find where the gear is touching right in all places and just deal with the whine.

 

I've heard other 3.90's whine like a sob before with a perfect pattern. I also heard that any ratio other than factory ratios (3.73, 4.10, 4.56, etc) have a high potential to howl. No idea why that is, but from what I have seen, it may be true.

 

How much backlash? Is it possible to have the pattern correct but still too much backlash? I was pricing those same gears today with the intention of putting them in my daily driver. Now I may rethink and go with the Yukon gears.

 

richmonds will whine one way or the other, I have mine setup perfect, backlash is dead nuts, pattern is perfect and I still have a whine

 

has anyone tried the motive gears. do they wine? I going to go with the new 4.30

 

How about the Yukon gears. Any reports of whine with them? They are real close in price.

 

I'm getting gear motive 4.10's with a trutrac put in mine tomorrow...dirt_track_racer_81 has them and likes them and thats mainly what they install at the shop he works at...No whine

 

I know mine was done by a shop, so i couldn't say what the backlash was set at, but it was a good shop that I trust. They even want back into it after the initial test drive just to check that everything was set right because the whine.