Changed rear diff fluid , Question
Thread Starter
Burning Brakes
Joined: Dec 2003
Posts: 974
Likes: 0
From: Boca Raton Florida
Changed rear diff fluid , Question
I had the fluid changed on my 1979 with stock rear end . Went ahead and did as recommended . 2 bottles of the GM fluid with one bottle of additive . My mechanic said it was low and I did not have any more fluid . Do I need to add or is a little low ok . Everything seems ok . Please chime in .
Melting Slicks
Joined: Mar 2009
Posts: 3,126
Likes: 15
Mine takes a little more than two bottles to fill. Of course it depends how much you can get drained or pumped out before refilling. With the car level, the lube should be at the bottom of the fill hole just short of running out. I filled mine with the front slightly lower than level and I probably have 3-4 oz. more then required. I would fill it to the bottom of the plug. mike...
Thread Starter
Burning Brakes
Joined: Dec 2003
Posts: 974
Likes: 0
From: Boca Raton Florida
Mine takes a little more than two bottles to fill. Of course it depends how much you can get drained or pumped out before refilling. With the car level, the lube should be at the bottom of the fill hole just short of running out. I filled mine with the front slightly lower than level and I probably have 3-4 oz. more then required. I would fill it to the bottom of the plug. mike...
Melting Slicks
Joined: Mar 2009
Posts: 3,126
Likes: 15
I can not answer that for sure. I would not want to run mine low on lube. Check into removing the plug to see if you get any lube to run out of the hole when the car is level. Some of the other Members may have a better idea. mike...
Thread Starter
Burning Brakes
Joined: Dec 2003
Posts: 974
Likes: 0
From: Boca Raton Florida
I don't want to be overly compulsive about little things but I don't want to be foolish either . Am I risking serious damage by just leaving it at 2 plus one additive . The reason i changed it is because of some chatter but now its gone . 
Thread Starter
Burning Brakes
Joined: Dec 2003
Posts: 974
Likes: 0
From: Boca Raton Florida
I should have brought it to them in the first place but I had the fluid and had a local mechanic do it .When he brought it back he said it seemed a little low .
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Burning Brakes
Joined: Mar 2012
Posts: 1,200
Likes: 1
From: Belle River Ontario
2015 C3 of Year Finalist
Good luck , don't be afraid to crawl under there and give er a go too. You'd be surprised at the savings for a little research!
It's a stinky , ****** job doing the read end lube though so have lots of rags handy... Ask me how I know!!!
Racer
Joined: Oct 2003
Posts: 424
Likes: 9
From: Killeen Texas
Just get another bottle of diff. oil and another bottle of additive, then measure and add the right amount of each (correct ratio) to top it off. No need to bring it to a shop and pay them. Spend that money on the oil and additive.
Thread Starter
Burning Brakes
Joined: Dec 2003
Posts: 974
Likes: 0
From: Boca Raton Florida
Texas Jim , In your honest opinion do you think I really need to add more fluid or am I ok at this point .
Thread Starter
Burning Brakes
Joined: Dec 2003
Posts: 974
Likes: 0
From: Boca Raton Florida