trans fluid?
Melting Slicks
Joined: Feb 2006
Posts: 2,938
Likes: 62
From: Columbia SC
When I had my 00 vert 6 speed I ran Royal Purple Sincromax and never had any issues. I noticed a marked improvement in the feel of shifts almost right away. My 04 Z06 that I just bought has 19,000 miles on it and this weekend I will be changing the trans fluid to the Royal Purple Sincromax and the diff fluid to the Royal Purple Max Gear 75 90. 
Thread Starter
Instructor
Joined: Aug 2009
Posts: 173
Likes: 5
I actually tried calling them yesterday and left a VM. No response yet, but I'll be a squeaky wheel. Like I said, I bought the car with trans installed...
Burning Brakes
Joined: Jul 2011
Posts: 1,097
Likes: 111
From: Fredericksburg Virginia
You could run either of the signature series or the torque drive. I run the blue signature series in my 99 and my 03 Bravada (brand new trans). Never had any issues and shifts are improved over stock fluid. Its been in the Vette since Oct 2010 with over 35K miles on it and 8 of those being supercharged. Added an additional cooler and remote filter. I use amsoil in everything that they make a product for.
Chris
Chris
Thread Starter
Instructor
Joined: Aug 2009
Posts: 173
Likes: 5
Thanks for the input. Called again and they said just run any dex3 and it will be just fine. I guess it's all about how much you want to spend and how much you believe in fluid hype. Not saying it's not legit.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
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
Burning Brakes
Joined: Jul 2011
Posts: 1,097
Likes: 111
From: Fredericksburg Virginia
Drifting
Joined: Sep 2009
Posts: 1,862
Likes: 594
From: Prescott, Arizona
Synthetics are more resistant to breakdown at high temperature. Amsoil, Dex 6 and Redline D4 ATF are three that I am aware of.
For the street, Dex 3 as RPM indicates should be fine.
Before adding more transmission fluid cooling I saw as high as 270 degrees on track.
Close to 100,000 miles, ten track days, perhaps 700 miles at WOT or hard on the brakes so far.
I happen to have been using Redline D4 ATF, a full synthetic and in view of the track time, change fluid and filter about every two years.
Keep in mind that a fluid and filter change removes about half of the fluid in the transmission, the other half is in the torque converter and works and does not drain out. After two changes, about 25% of the original fluid is still in the transmission.
For the street, Dex 3 as RPM indicates should be fine.
Before adding more transmission fluid cooling I saw as high as 270 degrees on track.
Close to 100,000 miles, ten track days, perhaps 700 miles at WOT or hard on the brakes so far.
I happen to have been using Redline D4 ATF, a full synthetic and in view of the track time, change fluid and filter about every two years.
Keep in mind that a fluid and filter change removes about half of the fluid in the transmission, the other half is in the torque converter and works and does not drain out. After two changes, about 25% of the original fluid is still in the transmission.
Thread Starter
Instructor
Joined: Aug 2009
Posts: 173
Likes: 5
Synthetics are more resistant to breakdown at high temperature. Amsoil, Dex 6 and Redline D4 ATF are three that I am aware of.
For the street, Dex 3 as RPM indicates should be fine.
Before adding more transmission fluid cooling I saw as high as 270 degrees on track.
Close to 100,000 miles, ten track days, perhaps 700 miles at WOT or hard on the brakes so far.
I happen to have been using Redline D4 ATF, a full synthetic and in view of the track time, change fluid and filter about every two years.
Keep in mind that a fluid and filter change removes about half of the fluid in the transmission, the other half is in the torque converter and works and does not drain out. After two changes, about 25% of the original fluid is still in the transmission.
For the street, Dex 3 as RPM indicates should be fine.
Before adding more transmission fluid cooling I saw as high as 270 degrees on track.
Close to 100,000 miles, ten track days, perhaps 700 miles at WOT or hard on the brakes so far.
I happen to have been using Redline D4 ATF, a full synthetic and in view of the track time, change fluid and filter about every two years.
Keep in mind that a fluid and filter change removes about half of the fluid in the transmission, the other half is in the torque converter and works and does not drain out. After two changes, about 25% of the original fluid is still in the transmission.
