2000 Other Chevrolet Models Oil for manual transfer case

2000 CHEVROLET
103,000 MILES • V8 • 4WD • MANUAL
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GARYARD
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In a 2000 chevy 2500 pickup duramax 6.5 with a manual Tranny and Manual transfer case can gl5 be used in the transfer case instead of ATF.
Thanks
Gary
Nov 22, 2009 at 10:29 PM
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MHPAUTOS
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Hi there,

If the manufactures specify a spec oil type and grade it is for a good reason, other oils will not satisfy the lubrication needs such as viscosity, load bearing, heat transfer capacity, coefficient of friction requirements, changing the oil specs are fraught with danger, i would not do this at all, What is your thinking behind this change?

Mark (mhpautos)
Nov 23, 2009 at 3:44 AM
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GARYARD
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I had the truck serviced at a local garage, when I got the bill I noticed they put GL5 in the transfer case when I questioned them I was shown a " repair manual " they use that specified GL5 for this application. I didn't agree, but they said that was the new spec.
Nov 23, 2009 at 6:22 AM
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MHPAUTOS
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Hi there, all i can find is the original specs, i see no suppression for this, best you contact a dealer for the latest information, but i feel it should be running the ATF if that is the original spec... let me know what you find out and i can make an amendment in our data base.

Mark (mhpautos)
Nov 23, 2009 at 3:21 PM