Join Date: Mar 2010
Location: Fleming Island, FL
Feedback: 0 reviews
I am by NO means a mechanic... but, I have a 2 door, auto, and just did a ring / pinion gear change and added Spartan Lockers. I went with Yukon Gears, and my brother did the install for me. He, on the other hand IS a mechanic by profession.
Here is what I learned, watching him. First, he checked the factory backlash on my factory ring and pinion gears. My jeep only had about 16K miles on it when I did the gear swap. (I went to 4.88:1).
When he installed my new gears, he took the time to make some set up bearings out of my old pinion bearings. Basically, he honed the old pinion bearing to a slip fit, so he could take the pinion in and out, to measure the pinion depth, to make sure the gear mesh was spot on, and the backlash was within specs.
I drove the Jeep for a few miles to get the gears up to temp and then went through a cooling cycle. I did this four times, at about 25 miles a pop, before I drove it any distance.
I just dropped the covers yesterday, and changed the gear oil, checked backlash / gear mesh again, and they were spot on.
In fact, my Jeep rides BETTER now than it did factory... and the Yukon gears are VERY quiet. In fact, the lockers are WAY more quiet than I had imagined, since I had never run a lunchbox style locker before.
I'm very happy with the way it turned out.
If something is vibrating, or whining, I would take it back to who did your gear install. Just going on my own experience, it should not be making any noises.
2010 JK Sport: 4.88:1 Yukon Gears, Spartan Lockers, A.C.E. Rock Rails, Gobi Stealth Rack, HELLA FF75 lights, 16x8 ION ALLOY 174 wheels, 315/75/16 Maxxis Bighorn MT's, Smitty XRC front bumper, Smitty XRC8 winch and cover, Smitty roller fairlead license plate holder, Alpine Sound System with JL Audio Sub, 2.5" Rock Krawler Stock Mod lift, Bilstein 5100 shocks, Bedlined front Grille