Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

Transfer case fluids ?

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Old 03-06-2019, 05:22 AM
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Default Transfer case fluids ?

I have 2 trucks,K1500's, a 97 GMC 6.5 automatic 4x4 with a floor shift transfer case, and a 98 Chev 6.5 automatic ,4x4 with a push button transfer case .
I keep getting conflicting information on what fluids to use in the transfer cases. Both are high mileage ,and probably have never been changed. I don't want to go to synthetic , but some sources say the 98 push button has to have synthetic, and the 97 takes DEX III, .
Also how many liters/quarts does each take ?
Thanks
Pete
 

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