fluids for tranny diff
Melting Slicks
Joined: Sep 2003
Posts: 3,031
Likes: 74
From: If you don't weigh in you don't wrestle Road America
I've had good luck with Royal Purpal
SycroMax Tranny Lube designed just for manuels that use ATF - about 3.5 quarts
MaxGear Diff fluid for the rear end - about 2.5 to 3 quarts
SycroMax Tranny Lube designed just for manuels that use ATF - about 3.5 quarts
MaxGear Diff fluid for the rear end - about 2.5 to 3 quarts
Safety Car
Joined: Sep 2001
Posts: 4,596
Likes: 2
From: Atlanta GA
Diff holds 1.6 qts, so get 2.
Tranny holds 4qts, but you will only get 3.25 out/in.
I would recommend the amsoil severe gear for the diff and their ATF for the tranny.
Send a pm to subdriver as he is the amsoil sponsor here.
Using amsoil some need the gm additive in the diff some do not.
Make sure the car is level for the fill. Do not overfill the diff as it will cause the seals to leak. Some actually run the diff a hair low for track use.
I think amsoil also sells a fluid pump or you can get that at the local parts store.
Tranny holds 4qts, but you will only get 3.25 out/in.
I would recommend the amsoil severe gear for the diff and their ATF for the tranny.
Send a pm to subdriver as he is the amsoil sponsor here.
Using amsoil some need the gm additive in the diff some do not.
Make sure the car is level for the fill. Do not overfill the diff as it will cause the seals to leak. Some actually run the diff a hair low for track use.
I think amsoil also sells a fluid pump or you can get that at the local parts store.
Safety Car
Joined: Sep 2001
Posts: 4,596
Likes: 2
From: Atlanta GA
Originally Posted by 96CollectorSport
I've had good luck with Royal Purpal
SycroMax Tranny Lube designed just for manuels that use ATF - about 3.5 quarts
MaxGear Diff fluid for the rear end - about 2.5 to 3 quarts
SycroMax Tranny Lube designed just for manuels that use ATF - about 3.5 quarts
MaxGear Diff fluid for the rear end - about 2.5 to 3 quarts
Intermediate
Joined: Feb 2005
Posts: 40
Likes: 0
I previously used Redline MTL in the tranny and I was getting high transmission temp alarms almost every run session. I put Redline D4 in the last time and have not seen a high temp alarm since. Redline D4 is the synthetic equivalent to Dexron which is what your owners manual calls for. I also noticed there was some varnishing from using the MTL and i is quite a bit thicker than the D4.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
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
Le Mans Master
Joined: Aug 2002
Posts: 8,222
Likes: 0
From: Norfolk VA
personal opinion. I use Royal Purple because a local shop carries it. I doubt that it's any better or worse than Redline, AMSOIL, or Mobil 1, just easier to get. All 4 are good quality synthetic fluids and you can't go wrong with any of them.
Premium Supporting Vendor
Joined: Aug 2001
Posts: 5,364
Likes: 38
From: King George VA
Originally Posted by gmblack3
Diff holds 1.6 qts, so get 2.
Tranny holds 4qts, but you will only get 3.25 out/in.
I would recommend the amsoil severe gear for the diff and their ATF for the tranny.
Send a pm to subdriver as he is the amsoil sponsor here.
Using amsoil some need the gm additive in the diff some do not.
Make sure the car is level for the fill. Do not overfill the diff as it will cause the seals to leak. Some actually run the diff a hair low for track use.
I think amsoil also sells a fluid pump or you can get that at the local parts store.
Tranny holds 4qts, but you will only get 3.25 out/in.
I would recommend the amsoil severe gear for the diff and their ATF for the tranny.
Send a pm to subdriver as he is the amsoil sponsor here.
Using amsoil some need the gm additive in the diff some do not.
Make sure the car is level for the fill. Do not overfill the diff as it will cause the seals to leak. Some actually run the diff a hair low for track use.
I think amsoil also sells a fluid pump or you can get that at the local parts store.
As he indicated, I use the AMSOIL ATF in my tranny and the AMSOIL Severe Gear Extreme Pressure Synthetic 75w90 in my diff for my SCCA T1 car and have had very good results with it. My car is still on the original stock tranny and diff after something like 15k street miles, 10 DE days and 28 or so SCCA races without any rebuilds (though I am planning one this winter just as a precaution).
Preferred Customers save about 25%.
AMSOIL Preferred Customer Program
If anyone has any questions, please don't hesitate to drop me a line.
__________________
C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
Race Director
Joined: Sep 1999
Posts: 12,439
Likes: 920
From: CONCORD NC
I've always run Mobil 1, they are readily available at your local Advance/Autozone, and work very well. They have never let me down.
Don't forget the diff additive (GM and Ford both work fine)
Don't forget the diff additive (GM and Ford both work fine)