MN6 Trans Fluid Question
Thread Starter
Racer
Joined: Aug 2006
Posts: 284
Likes: 0
From: Orlando Florida
MN6 Trans Fluid Question
I have searched and searched, including FAQ....
and I know this has been gone over before but I cant seem to find the right answer
I need to change my 2005 C6 Z51 MN6 Transmission fluid - first timer
Reading up on Amsoil, there seems to be two options.
AMSOIL ATF (stock code ATFQT)
AMSOIL Torque-Drive Synthetic Transmission Fluid (stock code ATD)
Question #1 - This appears to be Automatic Trans Fluid.
and...The Dexron appears TO be ATF
Is it common to put ATF in a manual trans?
Royal Purple Syncromax is option #2 and it does not appear to be ATF
http://www.royalpurple.com/manual-tr...ion-fluid.html
Question #2- It appears that the same fluid also used in the Differential? Is this correct?
Also- roughly what quantities should I buy?
Sincere Thanks
and I know this has been gone over before but I cant seem to find the right answer
I need to change my 2005 C6 Z51 MN6 Transmission fluid - first timer
Reading up on Amsoil, there seems to be two options.
AMSOIL ATF (stock code ATFQT)
AMSOIL Torque-Drive Synthetic Transmission Fluid (stock code ATD)
Question #1 - This appears to be Automatic Trans Fluid.
and...The Dexron appears TO be ATF
Is it common to put ATF in a manual trans?
Royal Purple Syncromax is option #2 and it does not appear to be ATF
http://www.royalpurple.com/manual-tr...ion-fluid.html
Question #2- It appears that the same fluid also used in the Differential? Is this correct?
Also- roughly what quantities should I buy?
Sincere Thanks
Le Mans Master
Joined: Dec 2002
Posts: 7,588
Likes: 6
From: Montreal Qc
Yes the MN6 calls for ATF but I can't tell you for sure which Amsoil is best. I did however use one of them last summer but I'll have to look at the jug to see which type it was.
And no, trans fluid and diff fluid are not the same...not even close! The diff uses a much heavier oil, for mine I also used Amsoil, but again will have to check to see what type it was.
And no, trans fluid and diff fluid are not the same...not even close! The diff uses a much heavier oil, for mine I also used Amsoil, but again will have to check to see what type it was.
Safety Car
Joined: Jun 2004
Posts: 3,563
Likes: 2
From: Dallas Tx
Go with the Amsoil ATF. It has the correct ratings. I've used it tons of times in numerous MN6 cars. The one thing you'll notice is just slightly easier to shift on the first few shifts of the day.
Common for modern manuals to use ATF. It's a good lube and has the qualities needed for modern synchros.
Common for modern manuals to use ATF. It's a good lube and has the qualities needed for modern synchros.
Thread Starter
Racer
Joined: Aug 2006
Posts: 284
Likes: 0
From: Orlando Florida
Go with the Amsoil ATF. It has the correct ratings. I've used it tons of times in numerous MN6 cars. The one thing you'll notice is just slightly easier to shift on the first few shifts of the day.
Common for modern manuals to use ATF. It's a good lube and has the qualities needed for modern synchros.
Common for modern manuals to use ATF. It's a good lube and has the qualities needed for modern synchros.
Thanks for the info.
I should have mentioned, the primary purpose for changing the fluid is that my trans is VERY stiff and notchy. Is the Amsoim ATF still be the best in this case?
Any idea of the amount of fluid I will need to do the Job?
Sincere thanks
Le Mans Master
Joined: Oct 2006
Posts: 5,078
Likes: 19
From: Cumming, GA
Royal Purple Syncromax user here. Changed twice in 10k intervals. Great results in my opinion. Used in my C5Z and now my C6 in all types of driving conditions.
I believe it takes 4+ qts if I recall correctly. Pretty easy to measure though as you cap it off once it starts to pour out of side fill hole.
Rear end I use 75W90 Royal Purple Gear max. I believe this is 2+ qts.
I believe it takes 4+ qts if I recall correctly. Pretty easy to measure though as you cap it off once it starts to pour out of side fill hole.
Rear end I use 75W90 Royal Purple Gear max. I believe this is 2+ qts.
Burning Brakes
Joined: Apr 2008
Posts: 946
Likes: 0
From: 1BadC6 New Jersey
St. Jude Donor '08
I have searched and searched, including FAQ....
and I know this has been gone over before but I cant seem to find the right answer
I need to change my 2005 C6 Z51 MN6 Transmission fluid - first timer
Reading up on Amsoil, there seems to be two options.
AMSOIL ATF (stock code ATFQT)
AMSOIL Torque-Drive Synthetic Transmission Fluid (stock code ATD)
Question #1 - This appears to be Automatic Trans Fluid.
and...The Dexron appears TO be ATF
Is it common to put ATF in a manual trans?
Royal Purple Syncromax is option #2 and it does not appear to be ATF
http://www.royalpurple.com/manual-tr...ion-fluid.html
Question #2- It appears that the same fluid also used in the Differential? Is this correct?
Also- roughly what quantities should I buy?
Sincere Thanks
and I know this has been gone over before but I cant seem to find the right answer
I need to change my 2005 C6 Z51 MN6 Transmission fluid - first timer
Reading up on Amsoil, there seems to be two options.
AMSOIL ATF (stock code ATFQT)
AMSOIL Torque-Drive Synthetic Transmission Fluid (stock code ATD)
Question #1 - This appears to be Automatic Trans Fluid.
and...The Dexron appears TO be ATF
Is it common to put ATF in a manual trans?
Royal Purple Syncromax is option #2 and it does not appear to be ATF
http://www.royalpurple.com/manual-tr...ion-fluid.html
Question #2- It appears that the same fluid also used in the Differential? Is this correct?
Also- roughly what quantities should I buy?
Sincere Thanks
Mike
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Verdad Gallardo
CF Senior Member
Joined: Feb 2006
Posts: 23,313
Likes: 25
From: Tucson Arizona
I never had any transmission problems but I did switch to Royal Purple Synchromax. I run the car hard at times and I've had no problems. I have some 75W90 RP gear oil for the differential but I decided to leave well enough alone for now. Given a little more mileage and I'll change the differential oil.
Here's a couple links that may help:
http://forums.corvetteforum.com/show...ion+oil+change
http://forums.corvetteforum.com/show....php?t=1497063
Here's a couple links that may help:
http://forums.corvetteforum.com/show...ion+oil+change
http://forums.corvetteforum.com/show....php?t=1497063
Safety Car
Joined: Jan 2006
Posts: 4,598
Likes: 78
From: Miami FL
2020 C6 of the Year Finalist - Unmodified
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16,'17,'18-'19-'20-'21-'22
So . . .
. . . run three quarts of Synchromax (it is light purple) and one quart of Mobil 1 ATF (it is very red). You get almost all the benefit of the Synchromax, but the blend LOOKS LIKE ATF. 
Intermediate
Joined: May 2005
Posts: 47
Likes: 0
From: Clifton Park New York
No question use ROYAL PURPLE.. Check out their web site for info. Syncro Max in the tranny and Gear Oil in the differnential.. I swapped out the tranny fluid after 300 miles on mine and really noticed the difference. Shifts smoother. It works . I got mine at NAPA.
Drifting
Joined: Jun 2005
Posts: 1,837
Likes: 4
Does help - and (probably) won't affect the warranty. Its better than Mobil 1 and whatever came from the factory.
Actually, I just went to all Red Line oils, as they now have a kit - engine, transmission and differential lube with additive, plus water wetter and fuel system cleaner. I'm a sucker for convenience.
