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I assume you mean transfer case. The answer is dexron 3
replace the seal
my 97 gmc suburban k2500 454 takes 7 qts of oil during oil change.
automatic transmission fluid
A GMC Suburban requires routine scheduled oil changes and inspections every 7,500 miles or 12,000 kilometers. Every 45,000 miles additional service is required such as changing the automatic transmission fluid, and transfer case fluid. At 150,000 miles a flush of the engine cooling system is recommended along with a thorough belt inspection.
shaft axle seals
donkey, you need frying oil
Manual Transfer case takes DEXRON-III Automatic Transmission Fluid. Automatic Transfer case takes Auto-Trak 11 Tranfer Case Fluid. Auto-Trak 11 is only available at GM dealer.
What do you want to know about its oul changes? When, how, the cost...?
5 qts with a new filter.
That would be the oil sending unit.
5 QTS. with new filter