3500 srw differential fluid capacity

[rblanch]

Does anyone know or know where to get the fluid capacity for 3500 srw. Rear end fluid. The owners Manuel just says see dealer

[dab5577]

Saw this when I bought my 2500 in Nov.


2020+ T1 Chevrolet/GMC HD Quick Reference Guide
https://r.tapatalk.com/shareLink/topic?share_fid=33003&share_tid=228066&url=https%3A%2F%2Fwww%2Egm-trucks%2Ecom%2Fforums%2F&share_type=t&link_source=app


Sent from my iPhone using Tapatalk

[rblanch]

Link doesn’t seem to work

[dab5577]

Hmm...I’m not sure how to link to another post. There’s a reference manual sticky in the 2020 HD forum that I tried to give a link to. I use Tapatalk on my phone and if you’re not that might be the link issue.


Sent from my iPhone using Tapatalk

[Montana Skies]

For the 2020 Chevrolet 3500 HD with the duramax diesel, the rear differential capacity is 6.3 pints.  FYI, for this same vehicle, the capacity for the front differential for trucks with 4 wheel drive is 3.8 pints.  This capacity information was found on the AMSOIL web site.   When I change the fluid in my truck's real limited slip differential, I also plan to add some limited slip friction modifier.

[rblanch]

That doesn’t sound like enough my 2017 held 4 quarts and the housing on the 12” ring gear looks bigger than the 2017

[dab5577]

This is from the reference sticky I was trying to link you to.


Rear Axle 12.0"
• Axle Lubricant:75w90 Synthetic Lubricant, 10-4016 / 88900401
• Capacity: 3.17 Quarts


Sent from my iPhone using Tapatalk

[rblanch]

Ok thanks

[redwngr]

30 minutes ago, Montana Skies said:

For the 2020 Chevrolet 3500 HD with the duramax diesel, the rear differential capacity is 6.3 pints.  FYI, for this same vehicle, the capacity for the front differential for trucks with 4 wheel drive is 3.8 pints.  This capacity information was found on the AMSOIL web site.   When I change the fluid in my truck's real limited slip differential, I also plan to add some limited slip friction modifier.

What limited slip did you put in your truck?

[Black02Silverado]

6 hours ago, rblanch said:

Does anyone know or know where to get the fluid capacity for 3500 srw. Rear end fluid. The owners Manuel just says see dealer

Is it a brand new truck?  You can look it up here, otherwise you would need to get with the dealer with your VIN to make sure.

[Montana Skies]

I called a local Chevrolet dealer and spoke to the parts counter employee.  He looked up the truck (2020 Chevy 3500 HD with diesel, etc.)  and said his documentation does not list the rear axle or front axle fluid capacity.  His documentation did list certain other fluid capacities such as engine oil, transmission, etc.  Don't know why his info didn't list capacity for axles.  Regardless, he advised when he changes his own gear oil in his rear axle (on an older vehicle), he adds sufficient fluid that he can put the last digit of his little finger in the rear axle lubricant fill hole and if he can touch the new fluid, he considers it done in terms of the fill level.  That's the rule of thumb I've heard service personnel say, also.  When I get around to changing my rear differential gear oil on my 2020 3500HD diesel with limited slip, I plan to buy 4 quarts of the appropriate viscosity gear oil and, after draining the "old" fluid and reinstalling the drain plug to add my new fluid until I can touch the new fluid as noted above.  Then, I will add 4 ounces of limited slip additive that I'll buy either at the Chevy dealer or I may buy the AMSOIL limited slip product.  Using this technique, worst case is I have some extra gear oil to use when I change the gear oil in a second truck I have.

[Ray Pickle]

Fill to fill hole.

[redwngr]

3 hours ago, Ray Pickle said:

Fill to fill hole.

Is that from GM somewhere or is it the 'traditional' fill amount?

 

The previous generation was overfilled if 'filled to hole'.

Spec for 2500 diesel and all 3500 was 0.6 to 0.8" below the bottom of the hole.

Haven't seen a recommendation for the 2020's

 

[redwngr]

10 hours ago, Montana Skies said:

I called a local Chevrolet dealer and spoke to the parts counter employee.  He looked up the truck (2020 Chevy 3500 HD with diesel, etc.)  and said his documentation does not list the rear axle or front axle fluid capacity.  His documentation did list certain other fluid capacities such as engine oil, transmission, etc.  Don't know why his info didn't list capacity for axles.  Regardless, he advised when he changes his own gear oil in his rear axle (on an older vehicle), he adds sufficient fluid that he can put the last digit of his little finger in the rear axle lubricant fill hole and if he can touch the new fluid, he considers it done in terms of the fill level.  That's the rule of thumb I've heard service personnel say, also.  When I get around to changing my rear differential gear oil on my 2020 3500HD diesel with limited slip, I plan to buy 4 quarts of the appropriate viscosity gear oil and, after draining the "old" fluid and reinstalling the drain plug to add my new fluid until I can touch the new fluid as noted above.  Then, I will add 4 ounces of limited slip additive that I'll buy either at the Chevy dealer or I may buy the AMSOIL limited slip product.  Using this technique, worst case is I have some extra gear oil to use when I change the gear oil in a second truck I have.

The reason I was asking about the diff is that the G80 is a locker, not a limited slip.

 

It is standard on all 2020 3500's.