I have a 2013 Tahoe 5.3L 4x4 160,000 miles and unknown drain and refill history. I would like to change the front and rear diff fluid along with the transfer case.
In my owners manual the transfer case calls for Dexron VI fluid, no big deal and widely available.
The front diff calls for 80w90 but some online reading says that 75W90 can be used.
The rear diff calls for 75W90 synthetic. I assume at this point I can use the same fluid for the front and rear diff. I can’t find any information if friction modifier should be added or not for front and rear differential. Some say no, some say add it in and it won’t hurt.
Also my front pinion seal has a little bit of weeping. It’s not anywhere near dripping. Is there such a thing as high mileage gear oil to condition the seal?
What’s your ideas on the correct fluid to ise in my situation?
In my owners manual the transfer case calls for Dexron VI fluid, no big deal and widely available.
The front diff calls for 80w90 but some online reading says that 75W90 can be used.
The rear diff calls for 75W90 synthetic. I assume at this point I can use the same fluid for the front and rear diff. I can’t find any information if friction modifier should be added or not for front and rear differential. Some say no, some say add it in and it won’t hurt.
Also my front pinion seal has a little bit of weeping. It’s not anywhere near dripping. Is there such a thing as high mileage gear oil to condition the seal?
What’s your ideas on the correct fluid to ise in my situation?
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