!
, but it's worth it. See GTR1999's comments above.
Differential Fluid ??
Thread Starter
Le Mans Master
Joined: Jun 2006
Posts: 6,399
Likes: 1,226
From: Tampa Florida
Differential Fluid ??
I'm getting ready to change the fluid in my differential and transmission. The Owner's Manual says to use GL-5 Lubricant. The last time I replaced the Diff. Fluid, I bought it at the Chevy dealer along with the Additive.
Is that what I should use, or, are you guys using Mobil 1 Synthetic or another brand?
Thanks,
Dave
Is that what I should use, or, are you guys using Mobil 1 Synthetic or another brand?
Thanks,
Dave
Burning Brakes
Joined: Nov 2005
Posts: 1,137
Likes: 51
From: Cartersville GA
I was planning the same thing, and using the GM fluid like I got from the dealership last time.
Certainly if there is an equivalent, or better commercial product out there at about the same cost as the GM product, I would try it.
Certainly if there is an equivalent, or better commercial product out there at about the same cost as the GM product, I would try it.
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
I used NAPA 75W90 gear lube that has the additive. My opinion, for what it's worth, I wouldn't use synthetics in these old Vettes that were not designed for it. They will often leak .
Melting Slicks
Joined: Jan 2007
Posts: 2,589
Likes: 5
From: Salisbury Maryland
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
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
Thread Starter
Le Mans Master
Joined: Jun 2006
Posts: 6,399
Likes: 1,226
From: Tampa Florida
Thanks chevy69, 
...I decided to keep it all GM!
I went to the Chevrolet dealer where my car was purchased new and bought 3 bottles of fluid and 1 bottle of additive. I even got a little discount.
The fluid cost me $6.68 per 23 oz. bottle and $9.42 for the 4 oz bottle of additive. I'll be getting a little dirty tomorrow morning.
The Chevy dealer is on its third owner, but my Vette is only on its second owner.
...I decided to keep it all GM!I went to the Chevrolet dealer where my car was purchased new and bought 3 bottles of fluid and 1 bottle of additive. I even got a little discount.
The fluid cost me $6.68 per 23 oz. bottle and $9.42 for the 4 oz bottle of additive. I'll be getting a little dirty tomorrow morning.
The Chevy dealer is on its third owner, but my Vette is only on its second owner.
but can you run me through the fluid change procedure -- I've never done it and want to turn the wrenches myself this weekend. She needs it.
Thread Starter
Le Mans Master
Joined: Jun 2006
Posts: 6,399
Likes: 1,226
From: Tampa Florida
Then, I add the 4 oz. bottle of additive and use that container to add new fluid 4 oz. at a time. I'm retired so I have plenty of time to do this.
I guess I could also run some clean fluid through the hand pump, then use it to add the new fluid.
Luckily, the transmission does have a drain plug so it goes pretty easy.
I'm sure someone else will post their procedure...It's always good to learn new techniques.
*NOTE* I just finished changing my differential fluid and I used my new suction pump to remove the old fluid. I put the additive in first, then, after cleaning my suction pump, I used it to add 2 bottles of fluid and topped it off using the additive bottle to squirt fluid into the differential.
Last edited by 71 Green 454; Jul 31, 2007 at 01:12 PM.