M6 Fluid Change
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
M6 Fluid Change
Before you say do a search....I did and found to much conflicting info.
I have heard that some synthetics will kill my paper blockers in my 99 trans. I have heard that there is a Royal Purple that will run fine in my trans and that there is one I should not run. I read on some threads that both are actually fine.
All I want to know is what Royal Purple is safe to run in my early M6 w/ paper blockers?!?!?!?!?
Doing wires, plugs, oil change, and TICK adjustable master before I hit the track this spring. Figured I'd do he tranny fluid while I'm at it.
I have heard that some synthetics will kill my paper blockers in my 99 trans. I have heard that there is a Royal Purple that will run fine in my trans and that there is one I should not run. I read on some threads that both are actually fine.
All I want to know is what Royal Purple is safe to run in my early M6 w/ paper blockers?!?!?!?!?
Doing wires, plugs, oil change, and TICK adjustable master before I hit the track this spring. Figured I'd do he tranny fluid while I'm at it.
Drifting
Joined: Jun 2006
Posts: 1,702
Likes: 1
[QUOTE=nickolbag;1568700655]Before you say do a search....I did and found to much conflicting info.
I have heard that some synthetics will kill my paper blockers in my 99 trans. I have heard that there is a Royal Purple that will run fine in my trans and that there is one I should not run. I read on some threads that both are actually fine.
I run the GM Synchromesh (synthetic fluid) supposedly this fluid is OK for all M6 & M12 tranny's.My tranny is a aftermarket peice so there are no paper blockers to worry about.Check with GMPP about the Syncromesh product...it's good stuff.
I have read several negitive treads about the RP product on LS1 TECH,and the issues were more than just related to the paper blockers.
I have heard that some synthetics will kill my paper blockers in my 99 trans. I have heard that there is a Royal Purple that will run fine in my trans and that there is one I should not run. I read on some threads that both are actually fine.
I run the GM Synchromesh (synthetic fluid) supposedly this fluid is OK for all M6 & M12 tranny's.My tranny is a aftermarket peice so there are no paper blockers to worry about.Check with GMPP about the Syncromesh product...it's good stuff.
I have read several negitive treads about the RP product on LS1 TECH,and the issues were more than just related to the paper blockers.
Le Mans Master
Joined: Apr 2005
Posts: 8,077
Likes: 4
From: Scarborough ONTARIO
nick, research it, i did a lot and found AMSoil ATF is better (they do have for manual tranny too but not preferable, AMSoil dealer told me when i did).
I have drive 2k miles after i replaced and no problems yet.
I have drive 2k miles after i replaced and no problems yet.
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
I read stuff about their engine oil but nothing negative about the tranny fluid. Guess I'll head over to Tech and maybe I can get an answer there.
I just dont want to cause premature tranny failure cause of some fluid I used.
7th Gear
Joined: Jan 2009
Posts: 7
Likes: 1
From: Illinois
Use Royal Purple Synchromax, trust me on this one. I as well as a ton of other BMW M3 owners swear by it. Our M3's use a lifetime fluid from the factory, not sure if yor vettes do. And we all choose to replace that garbage with royal purple synchromax. Best stuff ive ever put in a gearbox.
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
Use Royal Purple Synchromax, trust me on this one. I as well as a ton of other BMW M3 owners swear by it. Our M3's use a lifetime fluid from the factory, not sure if yor vettes do. And we all choose to replace that garbage with royal purple synchromax. Best stuff ive ever put in a gearbox.
Seems the guys on tech have not settled on what synthetics work and what ones don't.
Drifting
Joined: Jun 2006
Posts: 1,702
Likes: 1
[QUOTE=98vettedave;1568700968]
I actually should have said negitive RP posts on tranny fluid treads.There are so many opinions that it's hard to tell the real facts from fiction.However,that paper blocker issue does appear a number times in various treads...would have to be conserned about the possibility of a problem developing with that product.
I doubt that the BMW's mentioned in the previous post have paper blockers...so it's not apples to apples.
Before you say do a search....I did and found to much conflicting info.
I have heard that some synthetics will kill my paper blockers in my 99 trans. I have heard that there is a Royal Purple that will run fine in my trans and that there is one I should not run. I read on some threads that both are actually fine.
I run the GM Synchromesh (synthetic fluid) supposedly this fluid is OK for all M6 & M12 tranny's.My tranny is a aftermarket peice so there are no paper blockers to worry about.Check with GMPP about the Syncromesh product...it's good stuff.
I have read several negitive treads about the RP product on LS1 TECH,and the issues were more than just related to the paper blockers.
I have heard that some synthetics will kill my paper blockers in my 99 trans. I have heard that there is a Royal Purple that will run fine in my trans and that there is one I should not run. I read on some threads that both are actually fine.
I run the GM Synchromesh (synthetic fluid) supposedly this fluid is OK for all M6 & M12 tranny's.My tranny is a aftermarket peice so there are no paper blockers to worry about.Check with GMPP about the Syncromesh product...it's good stuff.
I have read several negitive treads about the RP product on LS1 TECH,and the issues were more than just related to the paper blockers.
I doubt that the BMW's mentioned in the previous post have paper blockers...so it's not apples to apples.
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
I actually should have said negitive RP posts on tranny fluid treads.There are so many opinions that it's hard to tell the real facts from fiction.However,that paper blocker issue does appear a number times in various treads...would have to be conserned about the possibility of a problem developing with that product.
I doubt that the BMW's mentioned in the previous post have paper blockers...so it's not apples to apples.
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Le Mans Master
Joined: May 2008
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From: Helotes TEXAS
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
I had problems running Mobil 1 in my 1998 M6 transmission after 50,000 miles. It would grind going into 6th gear. I changed clutch fluid, no change. I changed fluid to Amsoil ATD and the grinding stopped immediately. Now, 18,000 miles later, no problems.
From my experience, Mobil 1 ATF is NOT compatable with 1998-2000 M6 transmissions and Amsoil ATD is.
The advantage of a synthetic fluid is easier shifting, especially during cold temperatures.
From my experience, Mobil 1 ATF is NOT compatable with 1998-2000 M6 transmissions and Amsoil ATD is.
The advantage of a synthetic fluid is easier shifting, especially during cold temperatures.
Instructor
Joined: May 2006
Posts: 196
Likes: 1
From: ct
I thought about going to synthetic when I changed the fluid in my '98 but I ended up going with the recommended dextron. Runs fine although I don't drive it in the winter so I don't know if there would be day to day issues.
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
It works fine most of the time. When I'm ripping it down a drag strip I would like the car to shift as smooth as possible. Most agree synthetic helps create a smoother shift. If I were just street driving it I would stick with the stock stuff but cause of the drag racing I want synthetic.
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
I had problems running Mobil 1 in my 1998 M6 transmission after 50,000 miles. It would grind going into 6th gear. I changed clutch fluid, no change. I changed fluid to Amsoil ATD and the grinding stopped immediately. Now, 18,000 miles later, no problems.
From my experience, Mobil 1 ATF is NOT compatable with 1998-2000 M6 transmissions and Amsoil ATD is.
The advantage of a synthetic fluid is easier shifting, especially during cold temperatures.
From my experience, Mobil 1 ATF is NOT compatable with 1998-2000 M6 transmissions and Amsoil ATD is.
The advantage of a synthetic fluid is easier shifting, especially during cold temperatures.
In all my searches this is the only one people said they didn't have a problem with.
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
http://forums.corvetteforum.com/c5-t...-question.html
Burning Brakes
Joined: Mar 2005
Posts: 1,227
Likes: 15
St. Jude Donor '06
Amsoil or OEM fluid are the only two fluids i trust in the early C5 trans.
Amsoil.com, shop, Amsoil ATF. Get the pump as well from Amsoil, but be sure to pull the squiter tip out of the clear plastic tube. If you dont, theres a potential that it slips out of the tube and lands inside the trans and there no way to get it out if it does come off...ask me how i know....luckily it will be rebuilt in the spring anyway.
Amsoil.com, shop, Amsoil ATF. Get the pump as well from Amsoil, but be sure to pull the squiter tip out of the clear plastic tube. If you dont, theres a potential that it slips out of the tube and lands inside the trans and there no way to get it out if it does come off...ask me how i know....luckily it will be rebuilt in the spring anyway.
Tech Contributor
Joined: Jan 2007
Posts: 19,493
Likes: 1,178
From: Dyer, IN
It works fine most of the time. When I'm ripping it down a drag strip I would like the car to shift as smooth as possible. Most agree synthetic helps create a smoother shift. If I were just street driving it I would stick with the stock stuff but cause of the drag racing I want synthetic.
That being said, if I was auto-xing the car, I would run synthetic...only because I'd be pushing the car to it's limits....and exploring the top end of the rpm range for an extended period of time.
For street driving, and a few outings at the strip a year, the Dextron will not fail you.
Last edited by lucky131969; Jan 26, 2009 at 10:14 PM.
Le Mans Master
Joined: Sep 2007
Posts: 7,604
Likes: 8
From: Belleville Il
Mobile 1 is the paper blocker ring killer!! I used RP syncromax and have put about 8,000 mi that has included 13 chassis dyno pulls and about 17 strip passes.Operating just fine. Stock fluid,Amsoil,Royal purple are all good.Just getting clean fresh fluid will make a difference,,,changed mine at around 55,000 and that fluid was NASTY!!!
4th Gear
Joined: Jun 2008
Posts: 4
Likes: 0
My 2000 FRC had shifting problems using RP. I even bought an ebay Z06 tranny. Before I rebuilt and installed the close ratio, I replaced the fluid with the new Dexron which is fully synthetic. What a difference. Night and day. Back to normal. By the way, the Z06 tranny is using the Dexron 6 and working great.
Last edited by blky2kht; Jan 27, 2009 at 01:05 PM.
Race Director
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From: Whippany NJ
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