Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Sign in to follow this  
movario

Finding the right gear oil

Recommended Posts

Hi,

 

I just got my 2014 Silverado 5.3l and wanted to do a full fluid change.

Engine Oil will be a 0w20 dexos 1 Gen 2.

Transmission and Transfercase will be the Dexron VI.

Brakes will get DOT3

 

But i am having a hard time to find the right oil for the axles.

RPO Codes are GU6 and G80

Manual says:

Front Axle 80W-90

Rear Axle 75W-85

 

My question is:

How much oil do I need for the front/rear axle?

 

I've got about 4l (4.2quarts) of RAVENOL Getriebeöl EPX SAE 80W-90 GL-5 Hypoid Mineral https://www.ravenol-shop.de/getriebeoel/80w-90/ravenol-epx-80w90 will this be suitable for the front axle?

And for the rear axle, I could choose between these two oils https://www.ravenol-shop.de/pkw/schaltgetriebeol-achsoel/?p=1&o=2&n=15&f=703 One is with Limited Slip, the other without, which one do I need?

 

 

Share this post


Link to post
Share on other sites
28 minutes ago, movario said:

Hi,

 

I just got my 2014 Silverado 5.3l and wanted to do a full fluid change.

Engine Oil will be a 0w20 dexos 1 Gen 2.

Transmission and Transfercase will be the Dexron VI.

Brakes will get DOT3

 

But i am having a hard time to find the right oil for the axles.

RPO Codes are GU6 and G80

Manual says:

Front Axle 80W-90

Rear Axle 75W-85

 

My question is:

How much oil do I need for the front/rear axle?

 

I've got about 4l (4.2quarts) of RAVENOL Getriebeöl EPX SAE 80W-90 GL-5 Hypoid Mineral https://www.ravenol-shop.de/getriebeoel/80w-90/ravenol-epx-80w90 will this be suitable for the front axle?

And for the rear axle, I could choose between these two oils https://www.ravenol-shop.de/pkw/schaltgetriebeol-achsoel/?p=1&o=2&n=15&f=703 One is with Limited Slip, the other without, which one do I need?

 

 

G80 is a mechanical locker not a clutched limited slip so LSA additive not required. 

Share this post


Link to post
Share on other sites
Posted (edited)

Put 75w-80 in both. Plenty of owners do. Takes about 4-5 qts between the two generally, depending on ring gear size. No additional LSA additive as noted above. Amsoil's site has good reference material for capacities

Edited by txab
sp

Share this post


Link to post
Share on other sites
Posted (edited)

If you can find 75w-90 over there in a synthetic go with that.  No limited slip additive is needed as stated above.  Generally the front takes 2qts just about and the rear will take just over 2 qts.  So a total of 5qts will give you what you need. 

 

I know you are not in the US but for a US built truck the AMSOIL look up guide is a good guide to follow. 

Edited by Black02Silverado
  • Like 1

Share this post


Link to post
Share on other sites

I just did my front and rear diff. I used Mobil 1 delvac 75w-90. It is important to get the delvac and not just mobil 1 75w-90. The delvac does not have the LS additive.

 

Cheapest I found was at summit racing, 32.99 for a gallon container. I bought other items so I qualified for free shipping. I ended having to buy an extra quart as 4 quarts was just not enough need about 60% of the final quart to top both off. I have a 5.3 with as I recall the middle size of rear end ratio.

 

Here is a pic of the gear oil.

 

 

fb3afe8db66a85c39c0a8749a40688e3.jpg

 

Sent from my iPhone using Tapatalk

 

Share this post


Link to post
Share on other sites

I used Amsoil 75W-90 for both front and rear axles.  They have a convenient hand pump that screws to the oil bottles for easy filling too.

 

GM specs:

Front Axle - 1.51qt

Fill to level with fill plug to 1/8” below

 

Rear Axle - 2.75qt

Fill to 1mm to 19mm below fill plug

  • Like 1

Share this post


Link to post
Share on other sites

I just did this on Saturday and I used Amsoil 75w-90 in both the front and rear diff. I got the easy squeeze container and they worked pretty well, no need for a pump. I also did the transfer case with Amsoil ATF but had to use a pump for that. Just a friendly tip to make sure to get the fill hole bolt out first before you drain the fluid. It took me a couple hours with no lift or jacking up the truck, yes a pain in the butt but its doable.   

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.