Changing the fluids in my 2014 Silverado and have a few questions

[GMcD]

I found a few threads on here but did not find anything concrete. Im looking to change the front and rear diffs and the front transfer case. From what i have gathered its OK to run 75w-90 in both diffs? Whats a good full synthetic i should be able to pickup locally? Also, whats a good synthetic fluid for the front transfer case? Thanks!

[cbrsilv15]

Perfect time to ask. Lol. I changed my diff fluids last weekend and did my transfer case yesterday. Mobil 1 75w-90 is fine for both front and rear. I used some Castrol synthetic ATF dex 6. Autozone pricematches amazon, so that might save you some shipping costs.

 

 

 

 

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[Black02Silverado]

Yes, Mobil 1 found locally will work just fine as will the Castrol dexron VI. The gasket on your rear diff is reusable.

[Sean Neilan]

Anyone know a good, finned, rear diff cover with drain plug as well as filler hole? Don't seem to be too many options for the 14+ yet

[Black02Silverado]

Here is one source.

[diyer2]

Advance Auto, Car Quest 75W90, full synthetic. Castrol Transmatic Dexron IV. I see no advantage to paying more for oil. If it meets spec, use it.

The important thing is changing it not matter what you use.

[GMcD]

What are the required amounts for the diffs and the transfer case? Thanks!

[GMcD]

Bump

[2017SierraSLT]

CAPACITIES:

Engine, with filter..........8 quarts  Cooling System, Initial Fill..........16.6 quarts Automatic Transmission, 6L80 Initial Fill..........6 quarts Automatic Transmission, Total Fill    6 speed LD 6L80..........12.2 quarts    6 speed W/ HD Cool 6L80..........12.4 quarts Differential, 8.25 RingGear Front..........3 pints Differential, 8.6 RingGear Rear..........4.2 pints Differential, 9.5 RingGear Rear..........5.5 pints Transfer Case, MP 3023/3024..........3.2 pints Transfer Case, MP 1222, 25,26..........3.2 pints

[Black02Silverado]

Here are the specs. 

 

CAPACITIES: Engine, with filter..........8 quarts [1] Cooling System, Initial Fill..........16.6 quarts Passenger Car & Light Truck Antifreeze & Coolant AMSOIL Antifreeze and Engine Coolant Automatic Transmission, 6L80 Initial Fill..........6 quarts Automatic Transmission, Total Fill    6 speed LD 6L80..........12.2 quarts    6 speed W/ HD Cool 6L80..........12.4 quarts Differential, 8.25 RingGear Front..........3 pints Differential, 8.6 RingGear Rear..........4.2 pints Differential, 9.5 RingGear Rear..........5.5 pints Transfer Case, MP 3023/3024..........3.2 pints Transfer Case, MP 1222, 25,26..........3.2 pints [1] After refill check oil level.

TORQUES:    Oil Drain Plug.....18 ft/lbs    Transfer Case      Fill Plug 13 ft/lbs      Drain Plug 13 ft/lbs

[stanz792]

On 10/9/2017 at 5:28 AM, Sean Neilan said:

Anyone know a good, finned, rear diff cover with drain plug as well as filler hole? Don't seem to be too many options for the 14+ yet

Another option http://www.bmracing.com/products/71506-cast-aluminum-differential-cover-for-gm-silverado-1500-sierra-1500-black/

[sdeeter19555]

https://www.offroadunlimited.com/orustore/pc/viewCategories.asp?idCategory=10

I owned one of these, awesome cover..

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[STINSAN3]

I need to change the diff and transfer case fluids on mine too.
Did anyone use Amsoil for the fluids? Since, I run their engine oil. Was gonna try to switch to Amsoll everything.

[txab]

I run Amsoil in the diffs, transfer case and trans

[KARNUT]

Old info but I think it applies. In 1988 we bought a 7.3 Ford one ton mostly for pulling a camper and back up eq hauler. At 100K miles the trans fried. We had just become Amsoil dealers and took their fluid to the rebuilder to put in. Around that time we added a banks kit to the engine and gear venders to the transmission. We use it for an additional 185K no more transmission troubles. From then on we change to amsoil transmission fluid and never had a failure again.


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