C1 & C2 Corvettes General C1 Corvette & C2 Corvette Discussion, Technical Info, Performance Upgrades, Project Builds, Restorations

Diff oil

Thread Tools
 
Search this Thread
 
Old Oct 22, 2011 | 11:33 AM
  #1  
UberXY's Avatar
UberXY
Thread Starter
Advanced
 
Joined: May 2008
Posts: 60
Likes: 1
Default Diff oil

I have a minor diff leak and am getting ready to replace the rear end cover gasket. Do I need to go to the Chevy dealer and buy 4 pints of GM rear axle lube, or is there a reasonably good brand name substitute to be found at the auto parts discount chains?
Reply
Old Oct 22, 2011 | 11:38 AM
  #2  
Pierre's Avatar
Pierre
Pro
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2000
Posts: 653
Likes: 9
From: Ottawa, Ont. Canada
Default

Year...
Reply
Old Oct 22, 2011 | 11:44 AM
  #3  
Donald #31176's Avatar
Donald #31176
Melting Slicks
All Eyes On Me
 
Joined: Jul 2004
Posts: 2,863
Likes: 195
From: Maryland
Default

Any reputable gear oil rated GL-5 80W-90 will work. If its a posi unit you will need 4oz-8oz of posi additive.

Last edited by Donald #31176; Oct 22, 2011 at 11:47 AM.
Reply
Old Oct 22, 2011 | 01:22 PM
  #4  
UberXY's Avatar
UberXY
Thread Starter
Advanced
 
Joined: May 2008
Posts: 60
Likes: 1
Default

Thanks.

It's a 64.

Reply
Old Oct 22, 2011 | 01:56 PM
  #5  
RestoMike's Avatar
RestoMike
Melting Slicks
20 Year Member
Photogenic
Photoriffic
Liked
 
Joined: Mar 2006
Posts: 2,640
Likes: 67
From: Livin' large and havin' fun in wonderful Oklahoma
Default Gear lub

Originally Posted by UberXY
I have a minor diff leak and am getting ready to replace the rear end cover gasket. Do I need to go to the Chevy dealer and buy 4 pints of GM rear axle lube, or is there a reasonably good brand name substitute to be found at the auto parts discount chains?

As stated any reputable gear oil will work. I'm currently using K & W Trans-X® Posi-Trac® Limited Slip Gear Oil Additive purchased from Advanced Auto parts for posi-additive.
Reply
Old Oct 22, 2011 | 02:53 PM
  #6  
UberXY's Avatar
UberXY
Thread Starter
Advanced
 
Joined: May 2008
Posts: 60
Likes: 1
Default

Originally Posted by RestoMike

As stated any reputable gear oil will work. I'm currently using K & W Trans-X® Posi-Trac® Limited Slip Gear Oil Additive purchased from Advanced Auto parts for posi-additive.

Great thanks. I will be at Advanced tomorrow, as they are having an amazing sale on Mobil 1 engine oil for my other cars, and I will pick up some diff oil.
Reply
Old Oct 22, 2011 | 03:53 PM
  #7  
Dan Hampton's Avatar
Dan Hampton
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2008
Posts: 5,662
Likes: 2,344
From: Lake Minnetonka, Mn
2018 C1 of Year Finalist
Default

Don't take this the wrong way, but have you looked at what is required to pull that diff cover off? Look hard before you proceed. It is not the 45 minute procedure found with C1s.
Reply
Old Oct 27, 2011 | 12:51 PM
  #8  
UberXY's Avatar
UberXY
Thread Starter
Advanced
 
Joined: May 2008
Posts: 60
Likes: 1
Default

Originally Posted by Dan Hampton
Don't take this the wrong way, but have you looked at what is required to pull that diff cover off? Look hard before you proceed. It is not the 45 minute procedure found with C1s.
Hey thanks Dan for the warning. I just checked the manual and you are correct - what a pita it is for replacing a $4 part.

Ub
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-1

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-2

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-3

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-4

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-5

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-6

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-7

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-8

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-9

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
Old Oct 27, 2011 | 01:24 PM
  #9  
Vette5.5's Avatar
Vette5.5
Le Mans Master
 
Joined: Sep 2004
Posts: 5,116
Likes: 5
From: Livonia MI
Default

I'd be careful adding the posi friction modifier, as allows more diff clutch pack slippage around corners, but sometimes more than you're wanting for straight line traction. You can always add it later.
Reply
Old Oct 27, 2011 | 04:52 PM
  #10  
vt65's Avatar
vt65
Safety Car
10 Year Member
 
Joined: Sep 2009
Posts: 4,142
Likes: 24
From: Simcoe Ontario
Default

Originally Posted by Vette5.5
I'd be careful adding the posi friction modifier, as allows more diff clutch pack slippage around corners, but sometimes more than you're wanting for straight line traction. You can always add it later.
wasn't aware of that, never heard it before, just in the process of changing pumpkins myself going to 3:08's from 3:71.....

Last edited by vt65; Oct 27, 2011 at 05:06 PM.
Reply

Get notified of new replies

To Diff oil





All times are GMT -4. The time now is 12:23 PM.

story-0
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-1
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-2
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-3
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-4
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-5
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-6
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-7
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-8
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-9
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE