Gearcase and Transfer Case Fluid Change

[AXE]

When I spoke with the TORCO rep at SEMA, a few years ago, he said most differential builders specify regular, ( not synthetic), gear oil because it runs cooler. I have always run regular. I did use synthetic in the final drive on my MC, because it only held 8 ounces. Do what you want but that's the information I received.

TORCO is widely known as a recommended gear oil manufacturer. I never see it around where I live so I use what's available .

I used 75W140 synthetic in my old 2500HD rear diff. Not sure it mattered, but lot's of guys towing heavy seemed to think it helped.

 

[GatorZR2]

Gear oil selection depends on application. If your running pre 2000 differentials, rock crawling or at the local dirt track for a night conventional might be a better option. Conventional gear oil does have better heat properties but poor cold weather properties, it also breaks down quicker and it's thicker. Modern diff's mostly require synthetic gear oil. Synthetic gear oil has the best of both worlds and it last longer and it's better for towing and daily driving. All gear oil foams at a certain temp and shearing is reduced. Even Nascar uses synthetic gear oil. You can't go wrong with Valvoline, Lucas or Amsoil synthetic gear oils.

 

[scubatech]

I used 75W140 synthetic in my old 2500HD rear diff. Not sure it mattered, but lot's of guys towing heavy seemed to think it helped.

We used to get all our oil in bulk of course in a fleet application. I spent 27 years running equipment and servicing all sorts of trucks, loaders, grader, etc. We used a product called Magna - Glide , I believe it was made by Conoco. It was 75W-140. Good heavy duty EP oil.

 

[OC ZR2]

Great write up Axlerose, thank you! Looking to do mine in the next few weeks. I found a PPE rear diff cover that has the drain plug in it, is this something new or did I miss you guys talking about it? I assume it's the 9.76 inch cover that fits?

PPE Silverado 1500 GM 9.76-Inch Heavy-Duty Aluminum Rear Differential Cover; Brushed 138051210 (14-26 Silverado 1500) - Free Shipping

FREE SHIPPING! Cast A356.0 T6 Aluminum. Expertly crafted from high-quality Cast A356.0 T6 Aluminum, this cover ensures maximum strength and durability. It's not

www.americantrucks.com

 

[AXE]

Great write up Axlerose, thank you! Looking to do mine in the next few weeks. I found a PPE rear diff cover that has the drain plug in it, is this something new or did I miss you guys talking about it? I assume it's the 9.76 inch cover that fits?

PPE Silverado 1500 GM 9.76-Inch Heavy-Duty Aluminum Rear Differential Cover; Brushed 138051210 (14-26 Silverado 1500) - Free Shipping

FREE SHIPPING! Cast A356.0 T6 Aluminum. Expertly crafted from high-quality Cast A356.0 T6 Aluminum, this cover ensures maximum strength and durability. It's not

www.americantrucks.com

Looks like it'll work, but verify it's ZR2 compatible with the locker diff! Seems narrow enough to not hit the heat shields and spare tire. If your gonna charge your fluid frequently or keep the truck long enough, it's probably worth the money.

 

[OC ZR2]

Copy that, thanks I'll check. It's a keeper peeper, too much invested in it!

 

[OC ZR2]

Chatted with them and they said it will fit!

 

[ZR2xBIZON]

Chatted with them and they said it will fit!

See if they have a Tufer 1 and send me the freebee

 

[OC ZR2]

Quit driving backwards on Black Bear Pass and you’ll be fine with the stock one silly

 

[ZR2xBIZON]

Quit driving backwards on Black Bear Pass and you’ll be fine with the stock one silly

 

[OC ZR2]

Please, I can see it now. Hey let’s try driving BB Pass backwards, literally.

 

[ZR2xBIZON]

Please, I can see it now. Hey let’s try driving BB Pass backwards, literally.

On my way right meow. Bring snacks!!

 

[OC ZR2]

After doing mine today at 50k, I'll be changing them a bit sooner. They were pretty beat and grey so as much as I use the 4x, I'm thinking around 30k. It's easy enough to do, shouldn't have put it off. Biggest mess is dealing with the oil, the change itself is pretty simple.

 

[ZR2xBIZON]

After doing mine today at 50k, I'll be changing them a bit sooner. They were pretty beat and grey so as much as I use the 4x, I'm thinking around 30k. It's easy enough to do, shouldn't have put it off. Biggest mess is dealing with the oil, the change itself is pretty simple.

Come over and help me do mine

 

[OC ZR2]

You got snacks? And none of that BS seaweed CO hippie stuff either!

 

[ZR2xBIZON]

You got snacks? And none of that BS seaweed CO hippie stuff either!

No devils lettuce here but all guaco toast your heart desires.

 

[OC ZR2]

OTW, Diddy ain't seen no oil job like this!