2000 Other Chevrolet Models Oil for manual transfer case

GARYARD

MEMBER
2000 CHEVROLET
V8
4WD
MANUAL
103,000 MILES

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

Sunday, November 22nd, 2009 AT 10:29 PM

3 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

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)

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Monday, November 23rd, 2009 AT 3:44 AM

GARYARD

MEMBER
8 POSTS

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.

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Monday, November 23rd, 2009 AT 6:22 AM

MHPAUTOS

MECHANIC
31,937 POSTS

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)

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Monday, November 23rd, 2009 AT 3:21 PM