8.1 allison- 36000 miles- service

By z85
February 25, 2005 in 2000-2014 Silverado HD & Sierra HD

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z85

Posted February 25, 2005

I have a 2500HD 4x4 with 8.1 and allison coming up on 36000 miles. Any suggestions on what to have checked or serviced before 36000? What problems have you had at about this milage or sooner. Also have the G80 locking rear end 4.10 and it has a slight gear whine at 60 MPH under constant throttle, dead quiet when you let off the gas. Dealer says new gear set wouldn't be any quieter. What do you think?

Thanks

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