mine have a whine about 60-70....really sucks on the hwy...what brand gears u get?
i have mine (USA Gear) and trey's (yukon Gear) both set to spec and mine make noise and his dont, i called USA and they said it was normal for their gears to make a little noise and as long as it doesnt get worse it will be fine
I would reset it. If you hear it over a loud exhaust... its pretty loud. I cant hear mine.
Originally Posted by RedHeartbeat
ive been down this road. My diff got so hot it was smoking and the gearfluid no longer was lubricating it actually was sticky to the touch not allowing my trutrac to function. You need to have it fixed asap
They're Summit brand gears I'm gonna check the BL again.
2006 extended cab, 6.0 swap, full bolt ons SOLD
2011 ECSB, 6.2, 6 spd, 3.73, 5" lift, 33" nitto, limo tint, debadged, volant CAI, muffler delete, black bear tune 14.0 @ 98 on the 33'sSOLD
2007 TBSS AWD, cam, stall, built trans, N2OSOLD
2006 RCSB cammed LQ9, full exhaust, 3200 stall, 2-4 drop
49 Ford F1
355 chevy / turbo 350 / 12 bolt posi / camaro subframed
should be like around .008 i think
Last edited by ff_jeff; 12-17-2008 at 02:15 PM.
.08 is very loose. Try for 0.004-0.006. 0.008 can work on used gears. Backlash is only one of many specs that must be right. Pinion depth a pattern are important too. Noises generated under decel or slight accel are usually pinion related. Steady speed noises are usually pattern related.
Hey GasGuzzler sorry for my ignorance but, how do you adjust for whine under accel. Is it the pinion nut?
Thanx for all the replies!
2006 extended cab, 6.0 swap, full bolt ons SOLD
2011 ECSB, 6.2, 6 spd, 3.73, 5" lift, 33" nitto, limo tint, debadged, volant CAI, muffler delete, black bear tune 14.0 @ 98 on the 33'sSOLD
2007 TBSS AWD, cam, stall, built trans, N2OSOLD
2006 RCSB cammed LQ9, full exhaust, 3200 stall, 2-4 drop
49 Ford F1
355 chevy / turbo 350 / 12 bolt posi / camaro subframed
you should have tried to used the stock shim on the pinion. The two bearing side shims are were the play counts... I'm probably way off but thats how mine was. We actually just moved the left shim to right and vice/versa and it was perfect. .006-.012 is what I was told the BL should be. A lot of gears come pre worn from the machinist too. Like Rons machine pre-runs theirs.
Last edited by ff_jeff; 12-18-2008 at 01:22 AM.
Most times the pinion shim can be reused but only if the new crush sleeve is pressed to the spec of pinion gear rotating torque. The side shims can usually be reused too but when the entire differential and new gears are installed, many times adjustments are needed. GM has a special tool that allows one to measure pinion depth and with some math, figure out the proper pinion shim. From there, all one has to due is crush the sleeve to the proper rotating torque, set the diff in with original thickness shims (although GM wants the cast iron "spacer" removed from each side and replaced with appropriate thickness steel shims, and measure pattern. GM actually makes two or three different measuring tools for picking side shim thickness too but it moves with new parts even less than pinion shim thickness. Aftermarket gears usually have the pinion depth required etched into the rear end of the pinion gear.
To make a long story short, you don't actually need to adjust the pinion alone....it needs to have the pattern run and reset....which should include another crush sleeve, possible pinion shim change, and possible side shim change.....or any combination thereof.
mine whine as well from 40-50mph but it's been like that for months.
at first they didnt and now they do. heard that its the brand.
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