The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Transfer case question: Manual vs Automatic

**jocko** · 10-30-2018, 10:30 AM

Yeah i had already purchased Mobil1 75W90 synthetic for my rear and Valvoline 80W90 for the front. Will take a look to confirm they don’t have lim slip additives, but pretty sure they are good to go. Thanks for the TSB #s. My fluids aren’t high mileage but are 18 years old, so even though it might not be necessary, wanted to start with fresh fluids for the truck’s new lease on life. It’s been sitting for most of its life.

10-30-2018, 10:30 AM	#22
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,937	Re: Transfer case question: Manual vs Automatic Yeah i had already purchased Mobil1 75W90 synthetic for my rear and Valvoline 80W90 for the front. Will take a look to confirm they don’t have lim slip additives, but pretty sure they are good to go. Thanks for the TSB #s. My fluids aren’t high mileage but are 18 years old, so even though it might not be necessary, wanted to start with fresh fluids for the truck’s new lease on life. It’s been sitting for most of its life.