When to change transfer case fluid on a Silverado Sierra?
The manual does recommend 22,500 mi service for “Extreme” conditions and 45,000 mi for “severe” and the 97,500 mi recommendation is for “normal”. So, I guess they aren’t lying, but they probably should specify that at 22,500 mi the fluid should be changed if its been used in exteme conditions.
What kind of oil is in a GMC 263 transfer case?
The 263 is the electronically operated “manual” transfer case that has the buttons on the dash. Rockland Standard Gear has tech articles on these manual transfer cases and recommends 5w-30 engine oil in those behind the diesel and allison because they tend to run hot and vaporize oil out the vent then they run low on fluid and burn up.
What kind of fluid does a GM body truck use?
The first dealer guy you talked to was right. Classic body trucks without Autotrak cases take GM Manual Transmission and Transfer Case fluid, p/n 88861800 . Its a Dexron III fluid under a different name as all transmissions run Dexon 6 now. 2 quarts of fluid.
What kind of fluid does a Silverado 2500 use?
The 2500 models do not have this option. They can be placed into 4 wheel drive by push buttons instead of a manual lever. Just that the case itself is not an Autotrac. You can use any quality dextron III ATF fluid in your t-case. For the amount that it takes, upgrading to a synthetic fluid lik Mobil 1 ATF or AMSOIL would benefit.
The manual does recommend 22,500 mi service for “Extreme” conditions and 45,000 mi for “severe” and the 97,500 mi recommendation is for “normal”. So, I guess they aren’t lying, but they probably should specify that at 22,500 mi the fluid should be changed if its been used in exteme conditions.
The 263 is the electronically operated “manual” transfer case that has the buttons on the dash. Rockland Standard Gear has tech articles on these manual transfer cases and recommends 5w-30 engine oil in those behind the diesel and allison because they tend to run hot and vaporize oil out the vent then they run low on fluid and burn up.
Where do I find transfer case fluid spec?
Just double check inside of the glovebox lid & make sure you see np1 for transfer case code. This is fluid spec copy/paste from the workshop manual. Forums are a terrible place for requesting manufacturer or model specifics, be careful with that in the future. Unless your transfer case has the “auto” function, it requires Dex III fluid.
What kind of transfer case does a GMC Truck have?
The NVG-261 and 263 are the “manual” transfer cases with the 261 being the real manually operated having the 4wd lever on the floor. The 263 is the electronically operated “manual” transfer case that has the buttons on the dash.