I have Yukon 4.56's in my truck. Been in there 3 years & many miles. Did the 2007 Power Tour right after I installed my setup. Did 2800 miles in 8 days. Never a peep. I'm critical myself when it comes to noises, too. My GTO has plenty
Not sure what you mean by noisy. Maybe the rear diff isn't set up correctly (tolerences). Could be a bad carrier bearing or even a pinion bearing. Even an axle bearing could be noisy.
Maybe give us a little more info IE when they are noisy - off/on the throttle, cold/hot, etc.
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Tod Hoffmann
1966 GTO Montero Red Hardtop - Holley EFI'd 462, KRE DPorts/Muncie 4spd
1990 Chevy 454SS pickup - Accel DFI/T56 6spd - Hot Rod Power Tour Long Hauler
1996 Chevy K2500 ECSB 'Poopy'
2002 Honda VTX1800C
2016 Cadillac CTS Premium
My project thread:
http://forums.maxperformanceinc.com/...d.php?t=516826