2008 Silverado G80 Rear Axle Fluid

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2008 Silverado G80 Rear Axle Fluid

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Chevrolet Forum >> Chevy Trucks, Vans & SUV's >> Silverado >> 2008 Silverado G80 Rear Axle Fluid

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2008 Silverado G80 Rear Axle Fluid - 3/16/2008 9:29:25 AM

brims

Posts: 40
Joined: 12/3/2006
Status: offline

I want to change the rear axle fluid along with the engine oil for the first change, just under 3,000 miles. There's a post on this forum that says that using anything but the GM fluid in the rear end is bad news http://www.chevroletforum.com/fb.asp?m=643 Is this true/still true? I'd like to switch to Mobil 1 but that is specifically recommended against.

I can't seem to find GM rear axle fluid anywhere online. Any thoughts? Thanks in advance.

Post #: 1

RE: 2008 Silverado G80 Rear Axle Fluid - 3/20/2008 6:07:33 PM

brims

Posts: 40
Joined: 12/3/2006
Status: offline

Can anyone give me any information on this please?

(in reply to brims)

Post #: 2

RE: 2008 Silverado G80 Rear Axle Fluid - 3/20/2008 7:20:29 PM

IAfarmer

Posts: 34
Joined: 5/9/2007
Status: offline

Why the rear axle?

(in reply to brims)

Post #: 3

RE: 2008 Silverado G80 Rear Axle Fluid - 3/24/2008 12:47:25 PM

wellmax

Posts: 34
Joined: 2/11/2008
Status: offline

why change differential oil at 3K? I tow with my 2500 series, had differential oil serviced at 60K when I had the transmission serviced.

All things back there are doing fine.

Better check warranty spec. something go wrong with a new truck and they will be looking for a reason to say it was your fault.

I always changed my own oil, but kept oil purchase tickets and never installed anything but AC oil filters until the warrenty was out.

Just my two cents.

Have had a GM service manager tell me to do that, said he had seen GM car with blow engine, 25K miles and GM rep close the hood and say no to warranty because it had other than a AC oil filter installed.

(in reply to brims)

Post #: 4

RE: 2008 Silverado G80 Rear Axle Fluid - 4/25/2008 12:45:27 PM

brims

Posts: 40
Joined: 12/3/2006
Status: offline

I feel changing the differntial fluid now is just a safe bet. So changing differential fluid voids the warranty from what you're saying? That sounds pretty shady. If GM is voiding warranties because the exact OEM equipment wasn't on there, and it wasn't a 10 cent AutoZone special, sounds like they are full of it.

Changing the differential fluid is like changing the engine oil, sure you don't need to do it as often, but it should be done. I got all the break in fluid out of the engine at 3,000 miles, truck said I had another 4,000 miles or so until I needed to change the oil. Sounds rediculous to me not to get any of the break in particles out.

(in reply to wellmax)

Post #: 5

RE: 2008 Silverado G80 Rear Axle Fluid - 4/25/2008 2:25:56 PM

ZX1100F1

Posts: 2433
Joined: 8/1/2006
Status: offline

quote:

ORIGINAL: jimbo310

Not sure what your problem might me...but according to the manual the rear axle grease does not need to be changed unless you do heavy towing. My dealer strongly disagrees and recommends that the rear axle grease be changed every 30,000 miles using only the GM synthetic lubricant and adds the friction additive for the limited slip differentials. Don't use any other synthetic rear axles greases...they will cause problems. The one that GM uses is made my Eaton...and is similar to the quality used in semis. Alot of people are trying to get away with using the cheaper Valvoline or Mobil 1 synthetic...a big mistake.

This guy is so far off the mark it aint even funny, GM trucks are not even available with a "limited-slip" rear end.

You can use any SAE 75W-90 Synthetic Axle Lubricant that meets GM Specification 9986115 which is basically API GL-5, Mobil-1 75W-90 is fine.

_____________________________

Dave

(in reply to brims)

Post #: 6

RE: 2008 Silverado G80 Rear Axle Fluid - 4/25/2008 7:56:22 PM

brims

Posts: 40
Joined: 12/3/2006
Status: offline

quote:

ORIGINAL: ZX1100F1

This guy is so far off the mark it aint even funny, GM trucks are not even available with a "limited-slip" rear end.

You can use any SAE 75W-90 Synthetic Axle Lubricant that meets GM Specification 9986115 which is basically API GL-5, Mobil-1 75W-90 is fine.

Thank you for your input, due to that, the dealer selling Mobil 1 in place of the GM lube, and the input from a mechanic on another forum, I have decided to go with the Mobil 1 which will be happening soon. Thank you.

(in reply to ZX1100F1)

Post #: 7

RE: 2008 Silverado G80 Rear Axle Fluid - 4/25/2008 10:52:53 PM

hquick