MN6 Tranny Fluid
02-07-2019, 11:56 AM
#1
Drifting
Thread Starter
MN6 Tranny Fluid
I've searched the forum and seem to get more confused rather than enlighted. Simple question: what is the correct GM transmission fluid for a 2011 GS coupe with MN6 tranny? I know folks like to suggest other brands..... but I prefer to stick with GM and want to be 100% sure of what I need before ordering or making a trip to the dealer. Thx.
02-07-2019, 12:04 PM
#3
Le Mans Master
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Location: New Mexico
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2018 C6 of Year Finalist
I just looked at my owner's manual (2009, but same trans as yours), GM Manual Transmission Fluid, # 88861800.
Edit: Just looked at 2011 also, same.
.
Edit: Just looked at 2011 also, same.
.
Last edited by 919cw313; 02-07-2019 at 12:12 PM.
02-07-2019, 12:11 PM
#4
Le Mans Master
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2018 C6 of Year Finalist
02-07-2019, 12:14 PM
#5
Melting Slicks
Dexron III is being phased out as a product name. It is being renamed Manual Transmission Fluid and carries p/n 88861800 U.S
DO NOT use Dexron VI in place of manual transmission fluid in any manual transmissions or transfer cases that specify Dexron III, as a failure may result.
DO NOT use Dexron VI in place of manual transmission fluid in any manual transmissions or transfer cases that specify Dexron III, as a failure may result.
02-07-2019, 12:15 PM
#6
Drifting
Thread Starter
02-07-2019, 12:32 PM
#7
Dexron III is being phased out as a product name. It is being renamed Manual Transmission Fluid and carries p/n 88861800 U.S
DO NOT use Dexron VI in place of manual transmission fluid in any manual transmissions or transfer cases that specify Dexron III, as a failure may result.
DO NOT use Dexron VI in place of manual transmission fluid in any manual transmissions or transfer cases that specify Dexron III, as a failure may result.
02-07-2019, 04:46 PM
#9
Drifting
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FWIW - I use Mobil 1 ATF in my 2005 MN6 with the Dexron III required Label. It improves the shifting IMHO and I recommend it.
According to ExxonMobil, Mobil 1 Synthetic ATF is of the following quality level:
According to ExxonMobil, Mobil 1 Synthetic ATF is of the following quality level:
- Allison C-4
- General Motors DEXRON® IIIH
- General Motors DEXRON® IIIG
- General Motors DEXRON® IIE
- General Motors DEXRON® IID
- General Motors DEXRON® II
- General Motors DEXRON®
- Ford MERCON®
- MAN 339 V1
- Volvo 97340
- Volvo 97341
Last edited by Dutch08; 02-07-2019 at 04:48 PM.
02-07-2019, 04:51 PM
#10
FWIW - I use Mobil 1 ATF in my 2005 MN6 with the Dexron III required Label. It improves the shifting IMHO and I recommend it.
According to ExxonMobil, Mobil 1 Synthetic ATF is of the following quality level:
According to ExxonMobil, Mobil 1 Synthetic ATF is of the following quality level:
- Allison C-4
- General Motors DEXRON® IIIH
- General Motors DEXRON® IIIG
- General Motors DEXRON® IIE
- General Motors DEXRON® IID
- General Motors DEXRON® II
- General Motors DEXRON®
- Ford MERCON®
- MAN 339 V1
- Volvo 97340
- Volvo 97341
02-07-2019, 04:55 PM
#11
Le Mans Master
The warning not to use Dexron-VI in manual gearboxes is from a GM Preliminary Information Bulletin (PI) that you see pasted around.
The same information is related in a GM TechLink article from May 2009 (attached):
The same information is related in a GM TechLink article from May 2009 (attached):
"Any vehicle that previously used DEXRON-III for a manual transmission or transfer case should now use p/n 88861800 (88861801 in Canada) Manual Transmission and Transfer Case Fluid... All licenses for DEXRON-III expired at the end of 2006 and will not be renewed. Fluids sold in the market after that date bearing claims such as 'suitable for use in DEXRON-III applications' or similar wording should be avoided, because ’DEXRON-III’ fluids are no longer checked and policed by GM and therefore may not be the originally tested and approved formulation.
Last edited by torquetube; 02-07-2019 at 04:57 PM. Reason: Roman numeral typo
02-07-2019, 05:56 PM
#12
Drifting
Thread Starter
FWIW - I use Mobil 1 ATF in my 2005 MN6 with the Dexron III required Label. It improves the shifting IMHO and I recommend it.
According to ExxonMobil, Mobil 1 Synthetic ATF is of the following quality level:
According to ExxonMobil, Mobil 1 Synthetic ATF is of the following quality level:
- Allison C-4
- General Motors DEXRON® IIIH
- General Motors DEXRON® IIIG
- General Motors DEXRON® IIE
- General Motors DEXRON® IID
- General Motors DEXRON® II
- General Motors DEXRON®
- Ford MERCON®
- MAN 339 V1
- Volvo 97340
- Volvo 97341
Correct me if I am wrong ..... but I believe Dexron III is NOT synthetic. But it's OK to use a synthetic aftermarket brand like Mobile 1? Are the synchros OK with that ???
02-07-2019, 10:56 PM
#14
I'm using Amsoil Signature Series Multi-Vehicle Synthetic Automatic Transmission Fluid in my '09 M6. I've had great results with this fluid in many applications including this one.
02-08-2019, 12:16 PM
#15
Melting Slicks
Using Amsoil as well. Great product with smoother shifting than the GM fluid, especially when cold.
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CrystalRedTed (02-09-2019)
02-09-2019, 09:56 AM
#18
Collectively, the owner community has a lot more test time into the car by now than GM ever did. Tires, fluids, etc have also improved a lot over the past decade. I think there are a number of good or better fluid options that are compatible with the GM specification. But no harm in sticking with the GM brand if preferred - nothing to worry or wonder about going that route and there's something to be said for that.
02-09-2019, 12:51 PM
#19
Drifting
Thread Starter
I think you're right. However, I doubt that anyone is using GM Part No. U.S. 12346241to lube their locks and hinges, which the Corvette engineers also tested with. I also doubt that many people are using the Goodyear Eagle F1 tires that the engineers tested with either. Collectively, the owner community has a lot more test time into the car by now than GM ever did. Tires, fluids, etc have also improved a lot over the past decade. I think there are a number of good or better fluid options that are compatible with the GM specification. But no harm in sticking with the GM brand if preferred - nothing to worry or wonder about going that route and there's something to be said for that.
Collectively, the owner community has a lot more test time into the car by now than GM ever did. Tires, fluids, etc have also improved a lot over the past decade. I think there are a number of good or better fluid options that are compatible with the GM specification. But no harm in sticking with the GM brand if preferred - nothing to worry or wonder about going that route and there's something to be said for that.
02-09-2019, 01:14 PM
#20