Differential and Transfer Case Fluids 2015 D-MAX - Chevy and GMC Duramax Diesel Forum
11-16 LML Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 4 (permalink) Old 10-20-2019, 11:21 PM Thread Starter
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Differential and Transfer Case Fluids 2015 D-MAX

-Getting ready to change the Differential Fluids in my 2015 D-MAX. Was gonna go with the AMSOIL SEVERE GEAR 75W-90 Gear Oil for both Front and Rear Diffs. Do I have to add any additives in with it for the Differential? OR can I just use the Gear Oil alone?

-I'm also gonna change out my Transfer Case Fluid. Wanted to use Transyd for that since I'm already using it in my Transmission. Thoughts on that? Thanks in advance.

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post #2 of 4 (permalink) Old 10-21-2019, 02:47 AM
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Don't know anything about Amsoil gear fluid...........Most recommend Mobile 1 Synthetic gear lube, No additives needed

Transynd in transfer case is perfect.
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2008 Silverado 2500HD CCSB LTZ Diesel
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post #3 of 4 (permalink) Old 10-21-2019, 03:54 AM
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What 407 said.

🤘 Kennedy fuel system support hardware, CCM front Diff Drop, some LEDs to make night into day, got some big ol 20's and wide ass tires and a nice display to show me what's up under the hood-

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post #4 of 4 (permalink) Old Today, 07:22 AM
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I put Transynd in the transfer case. It doesn't have the whine at 30-40 mph in 4-Hi like it used to. Not sure if its the Transynd or just flushing new fluid. It's much quieter now though...

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