Hi,
I had a mechanic install a set of Yukon Gears (5.13) in my 2011 2dr JK Sahara Auto and they were as quiet as stock for the first 30+ miles. After that they started to whine a little, then more and more. I am at 300 miles at the moment, and they whine kinda loud at about 45mph and I can actually feel the whine in the steering wheel.... kind of a very high pitched vibration?? At 60+mph it still whines but I don't feel it in the steering wheel anymore.

Do you guys have any ideas if it could be a bad bearing (Jeep has only 2500 miles!), bad install, too much backlash (or too little?). When I installed the gears with the mechanic we measured the backlash and it was about 0,007. The gear mark seeemed also correct.

Thanks a lot for any help.

 

I was told new gears should make noise at first. If thay don't its not write.

 

7 to 10 thousandth is correct back lash. You might want to try a better gear oil.

 

My Yukon boxed 5.13's never whined, quiet as stock, as it should be. You should get them checked out before its too late and you blow them.

 

Sounds like the problem we had 4.88 installed,the pinion bearing was not seated fully on the pinion shaft.Take it in before you have more problems

 

Thanks for all the responses. How do I check if the pinion bearing was fully seated?

 

I had whine for the first thousand miles and then new oil in the diffs... Whine is gone now and all is good.

 

Poser,

A couple of questions....

What brand of gears did you install? ratio? Was it a "loud" whine? could you still hear it with the radio on, etc. Did you have the whine on acceleration, deceleration or both?

Thanks

 

Don't remember brand.
I'm on 4.88. Whine wasn't too loud, but definitely there. Don't recall hearing it when radio was on, but it was pretty noticeable, and it gradually went away. I'd say the whine went on for a couple thousand miles.

Still running oem 32" tires and first 2 shifts (6sp.) are crap. Have to really let the revs go down OR double clutch to shift.

 

i put some yukon 5.13s in about 6k miles ago, had no whine at all, at any time.