Newbie ? Front and Rear Diff and Transfer case oil change interval

[eebh2]

Just want to check at what intervals the front,rear and transfer case oil needs changed at on a Hummer H2? Also how bout the transmission fluid as well. I recently purchased my Hummer H2 so wanted to get this all done as I am not sure of previous service records.


Let me know

[Monk]

As far as I know 50000km, for diffs and case, I'd just change all and you know your good for few years

Plus their nice do it yourself jobs.

[eebh2]

For the transfer case fluid what does it take and how much needed?

[whitehumh2]

Actually what most people do not realize is that if you are using a standard 80W-90 gear oil you need to replace it once a year! This would apply to all Hummer H1s. Factory fill on all Hummer H2s and H3s is a synthetic 75W-90 gear oil. This still needs to be replaced at least once every three years if you only do about 20,000km a year in order to remove any condensation in the oil. If you tow a lot or do frequent offroad you need to replace it once a year.
 
I actually use Amsoil 75W-110 since I do frequent towing and heavy offroad and I replace my oils once a year. Using the Amsoil 75W-90 would get me better mileage but I wanted better gear protection for the abuse I give my truck so that is why I use the 75W-110.
 
https://www.amsoil.com/shop/by-product/gear-lube/severe-gear-75w-90/?code=SVGQT-EA
 
https://www.amsoil.com/shop/by-product/gear-lube/severe-gear-75w-110/?code=SVTQT-EA
 
Hope this Helps,
 
Kev

[whitehumh2]

[quote="eebh2"]
For the transfer case fluid what does it take and how much needed?
[/quote]
 
 
Transfer Case service is recommended every 83,000km under normal conditions but if you tow or off-road you need to replace it once a year.
 
Transfer Case oil is Dexron III. Do not Use Dexron VI in a Transfer Case!
 
Kev