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.

2015.5 DURAMAX LTZ MIDNIGHT EDITION
6" Fabtech Lift Kit
20x12 Moto Metal Wheels
35x12.50 Nitto Trail Grapplers
EFI Live - PPEI Kory Willis
Flo~Pro 5" Stainless Exhaust
FASS 150 Lift Pump
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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
FASS 95 Lift Pump (with Baldwin filters), Edge Insight CTS Monitor on a Windshield Mount, Nicktane Fuel Filter Adapter w/ CAT 306-9199 UHE tertiary fuel filter, Bilstein 5100 Stock Height, Bushwacker Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, Dorman PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags.
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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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