Rear Diff lube change
Burning Brakes
Joined: Feb 2018
Posts: 906
Likes: 196
From: Northeast, PA
Instructor
Joined: Jan 2021
Posts: 214
Likes: 114
From: Powell TN
Agree
Most metal filings show up during break-in miles. I am in favor of getting those out early, somewhere around 10k miles. Plus, my differential fluid was 1 quart low from the factory.
Keep in mind that the plug torque specs are inch pounds not foot pounds. So, they are not super tight. I don’t remember the exact specs, but you should know that the fluid is not held under high pressure. Just tight enough not to leak. Stinky job, but easy enough even for my Z51 which will help the differential last a long while.
Save the wave, do not text and drive,
Keep in mind that the plug torque specs are inch pounds not foot pounds. So, they are not super tight. I don’t remember the exact specs, but you should know that the fluid is not held under high pressure. Just tight enough not to leak. Stinky job, but easy enough even for my Z51 which will help the differential last a long while.
Save the wave, do not text and drive,
Last edited by Kangarew; Jul 2, 2024 at 10:12 PM.
Safety Car
Joined: May 2006
Posts: 3,732
Likes: 708
From: Shelton, Connecticut
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
My 2014 rear and transmission fluid was changed at 18,900 miles in early May.
It was 10 years old.
Used Redline D4 ATF and GM gear oil.
It was 10 years old.
Used Redline D4 ATF and GM gear oil.
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Most metal filings show up during break-in miles. I’m in favor of getting those out early, somewhere around 10k miles. Plus, my differential fluid was 1 quart low from the factory.
Keep in mind that the plug torque specs are in “inch pounds” not “foot pounds.” So, they are not super tight. I don’t remember the exact specs, but you should know that the fluid is not held under high pressure. Just tight enough not to leak. Stinky job, but easy enough even for my Z51 which will help the differential last a long while.
Save the wave, don’t text and drive,
Keep in mind that the plug torque specs are in “inch pounds” not “foot pounds.” So, they are not super tight. I don’t remember the exact specs, but you should know that the fluid is not held under high pressure. Just tight enough not to leak. Stinky job, but easy enough even for my Z51 which will help the differential last a long while.
Save the wave, don’t text and drive,
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Try to loosen it with your fingers.
To be clear, the exact post I was responding to said the spec is inch pounds. That is not how GM publishes the spec. It is published in lb ft
Generally, the in-lb specs that GM publishes are <100. Trying to think of any I've seen more than that. Maybe something at 110 but most are in the 80s or well below for some of the interior fasteners.
To be clear, the exact post I was responding to said the spec is inch pounds. That is not how GM publishes the spec. It is published in lb ft
Generally, the in-lb specs that GM publishes are <100. Trying to think of any I've seen more than that. Maybe something at 110 but most are in the 80s or well below for some of the interior fasteners.
Burning Brakes
Joined: Nov 2022
Posts: 910
Likes: 430
From: MN
Agreed, and it would really help if GM actually filled them properly in the first place. My C7 was the 250'th one to come off the assembly line, and very likely had this problem unaddressed until I got the car at 75k.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Safety Car
Joined: May 2006
Posts: 3,732
Likes: 708
From: Shelton, Connecticut
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
If it was only $120, they would have done it.
Bought a new low profile Jack, Redline D4 AFT, 3qts GM gear oil.
Total was $300.
Next project is Dry Sump oil change. (Over $200 at the dealer)
Melting Slicks
Joined: Mar 2008
Posts: 2,453
Likes: 346
From: SC
Just had my 2017 done yesterday at my dealership. It was a quart low and pretty burnt. 34,000 miles. Obviously underfilled from the factory...