Trans fluid for 99 m6?
Thread Starter
Pro
Joined: Jun 2012
Posts: 534
Likes: 8
From: Fayetteville Ohio
Trans fluid for 99 m6?
I've searched tons on this and its just not real clear on what fluid to use when changing on the early m6 trans. My 99 frc has 65k miles on it. I hear the early ones have the paper blocking rings and not to run certain fluid. Is there any newer Information that's more clear these days. There's lots of use this,don't runt this going on. Thanks for any help you guys have
Jimmy
Jimmy
Melting Slicks
Joined: Mar 2002
Posts: 2,203
Likes: 63
From: Staten Island NY
I used Castrol Transmax a few years ago on my 99. Working fine ever since. You need Dexron III compatible fluid. Redline D4 is also popular.
http://www.autozone.com/motor-oil-an...tf/255525_0_0/
http://www.autozone.com/motor-oil-an...tf/255525_0_0/
Safety Car
Joined: Jan 2014
Posts: 4,496
Likes: 856
From: Walhalla South Carolina
I went through this with my 01 and ended up going with what I thought was Dextron lll Valvoline compatable but after feedback from forum i removed it and went with AMSOIL. If I had my time to go over i would go to chevy dealer and get the delco recommended fluid and not wast time and money and U know U have the correct fluid. I have probably 80 bucks in my change.
Burning Brakes
Joined: Jul 2011
Posts: 1,096
Likes: 110
From: Fredericksburg Virginia
I have done dozens of cars and several Vettes with amsoil. Everyone of them shifted better especially the Vettes and BMW's. If you go to the website and enter your car it will tell you what you can use. I believe off the top of my head its the red signature series. Good luck in your research and let us know what you did and what you thought of it afterwards.
Chris
Chris
Melting Slicks
Joined: Jun 2013
Posts: 3,473
Likes: 691
From: West Virginia
I am running Valvoline Dex/Merc which is non synthetic "old" DexIII (what you need) compliant. It works just fine - I have a '98. If you want to go synthetic, you won't typically find one at your local store because the big synthetic manufacturers (Mobil, Valvoline, et al) have all switched to DexVI, which is the current GM auto trans fluid, but per GM a definite no-no in a manual trans.
Last edited by jackthelad; Mar 18, 2015 at 10:25 AM.
Pro
Joined: May 2013
Posts: 740
Likes: 83
From: MN
+1 for the Transmax, put it in last year, no complaints. Get some good quality, name brand conventional Dex III ATF and you're good to go.
Melting Slicks
Joined: Mar 2002
Posts: 2,203
Likes: 63
From: Staten Island NY
YUP….19.95 for a gallon of Transmax another $19.99 for 2 qts of Castrol Syntrax gear lube, $9 for GM limited slip additive and $7 for a transfer pump from Harbor freight.
Trans and rear end fluid replacement for < $60.
Trans and rear end fluid replacement for < $60.
Melting Slicks
Joined: Jun 2013
Posts: 3,473
Likes: 691
From: West Virginia
Use an LS rated 75/90 in the rear end and the limited slip additive is not needed - already in there.
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Melting Slicks
Joined: Nov 2008
Posts: 2,938
Likes: 65
From: Rochester Hills MI
Amsoil synthetic ATF and Amsoil torque drive synthetic ATF are THE ONLY synthetic transmission fluids compatible with the pre-2001 m6 transmissions. It is the only synthetic ATF that has additives to counteract the swelling of cellulose compounds that occurs when they are exposed to synthetic ATF.
The cellulose components are the blocker rings (replaced with carbon fiber in 2001), and if you use anything but traditional petroleum based DexIII ATF or the above listed Amsoil fluids, you are ruining your transmission. Using the wrong fluid is not something you will notice until about a year or two after the fact, and it cannot be reversed without a rebuild.
Amsoil torque drive synthetic is the better of the 2 Amsoil fluids, and is hands down the absolute best fluid you can put in your pre-2001 m6 transmission. Personally, I would still use it in a 2001+ m6 or m12, and many people do.
The cellulose components are the blocker rings (replaced with carbon fiber in 2001), and if you use anything but traditional petroleum based DexIII ATF or the above listed Amsoil fluids, you are ruining your transmission. Using the wrong fluid is not something you will notice until about a year or two after the fact, and it cannot be reversed without a rebuild.
Amsoil torque drive synthetic is the better of the 2 Amsoil fluids, and is hands down the absolute best fluid you can put in your pre-2001 m6 transmission. Personally, I would still use it in a 2001+ m6 or m12, and many people do.
Last edited by SaberD; Mar 19, 2015 at 04:52 PM.
Thread Starter
Pro
Joined: Jun 2012
Posts: 534
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From: Fayetteville Ohio
Amsoil synthetic ATF and Amsoil torque drive synthetic ATF are THE ONLY synthetic transmission fluids compatible with the pre-2001 m6 transmissions. It is the only synthetic ATF that has additives to counteract the swelling of cellulose compounds that occurs when they are exposed to synthetic ATF.
The cellulose components are the blocker rings (replaced with carbon fiber in 2001), and if you use anything but traditional petroleum based DexIII ATF or the above listed Amsoil fluids, you are ruining your transmission. Using the wrong fluid is not something you will notice until about a year or two after the fact, and it cannot be reversed without a rebuild.
Amsoil torque drive synthetic is the better of the 2 Amsoil fluids, and is hands down the absolute best fluid you can put in your pre-2001 m6 transmission. Personally, I would still use it in a 2001+ m6 or m12, and many people do.
The cellulose components are the blocker rings (replaced with carbon fiber in 2001), and if you use anything but traditional petroleum based DexIII ATF or the above listed Amsoil fluids, you are ruining your transmission. Using the wrong fluid is not something you will notice until about a year or two after the fact, and it cannot be reversed without a rebuild.
Amsoil torque drive synthetic is the better of the 2 Amsoil fluids, and is hands down the absolute best fluid you can put in your pre-2001 m6 transmission. Personally, I would still use it in a 2001+ m6 or m12, and many people do.
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Joined: Aug 2001
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From: King George VA
Sorry missed this point and overcome for the OP as we have traded PMs, but for others reading this thread, this is the best AMSOIL fluid for the T56 and what I've been running in my 02 Z06 at the track for over 10 years now (without failure - though it has been rebuilt twice during that period).
AMSOIL Torque-Drive Synthetic Automatic Transmission Fluid (Product Code ATD1G)
More than happy to get AMSOIL products for forum members at dealer wholesale pricing, about 25% below retail, via the AMSOIL Preferred Customer Program. Drop me a PM if interested.
AMSOIL Torque-Drive Synthetic Automatic Transmission Fluid (Product Code ATD1G)
More than happy to get AMSOIL products for forum members at dealer wholesale pricing, about 25% below retail, via the AMSOIL Preferred Customer Program. Drop me a PM if interested.
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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%)
Instructor
Joined: Feb 2014
Posts: 136
Likes: 6
From: Lees Summit Missouri
Amsoil synthetic ATF and Amsoil torque drive synthetic ATF are THE ONLY synthetic transmission fluids compatible with the pre-2001 m6 transmissions. It is the only synthetic ATF that has additives to counteract the swelling of cellulose compounds that occurs when they are exposed to synthetic ATF.
The cellulose components are the blocker rings (replaced with carbon fiber in 2001), and if you use anything but traditional petroleum based DexIII ATF or the above listed Amsoil fluids, you are ruining your transmission. Using the wrong fluid is not something you will notice until about a year or two after the fact, and it cannot be reversed without a rebuild.
Amsoil torque drive synthetic is the better of the 2 Amsoil fluids, and is hands down the absolute best fluid you can put in your pre-2001 m6 transmission. Personally, I would still use it in a 2001+ m6 or m12, and many people do.
The cellulose components are the blocker rings (replaced with carbon fiber in 2001), and if you use anything but traditional petroleum based DexIII ATF or the above listed Amsoil fluids, you are ruining your transmission. Using the wrong fluid is not something you will notice until about a year or two after the fact, and it cannot be reversed without a rebuild.
Amsoil torque drive synthetic is the better of the 2 Amsoil fluids, and is hands down the absolute best fluid you can put in your pre-2001 m6 transmission. Personally, I would still use it in a 2001+ m6 or m12, and many people do.
Thread Starter
Pro
Joined: Jun 2012
Posts: 534
Likes: 8
From: Fayetteville Ohio
Got the Amsoil today. Swapped the trans and rearend fluids. I can tell a noticable difference in how it shifts. Not that I thought It was bad before. But Id say its worth the time and money.
Melting Slicks
Joined: Jun 2013
Posts: 3,473
Likes: 691
From: West Virginia
Amsoil synthetic ATF and Amsoil torque drive synthetic ATF are THE ONLY synthetic transmission fluids compatible with the pre-2001 m6 transmissions. It is the only synthetic ATF that has additives to counteract the swelling of cellulose compounds that occurs when they are exposed to synthetic ATF.
The cellulose components are the blocker rings (replaced with carbon fiber in 2001), and if you use anything but traditional petroleum based DexIII ATF or the above listed Amsoil fluids, you are ruining your transmission. Using the wrong fluid is not something you will notice until about a year or two after the fact, and it cannot be reversed without a rebuild.
The cellulose components are the blocker rings (replaced with carbon fiber in 2001), and if you use anything but traditional petroleum based DexIII ATF or the above listed Amsoil fluids, you are ruining your transmission. Using the wrong fluid is not something you will notice until about a year or two after the fact, and it cannot be reversed without a rebuild.