T56 Transmission - Mobil 1 ATF Compatibility Response from Tremec
11-12-2009, 04:01 AM
#21
Drifting
Who is Rob Sheppard?
Due to the controversy surrounding synthetics and the T56, I contacted Tremec/TTC Automotive. My question and Rob Sheppard's response:
I'm hoping you can provide a definitive response for an on-going debate on which type of fluids are acceptable in older T56 transmissions. I have a 2000 Chevrolet Corvette with 13k miles. I would like to switch to Mobil 1 synthetic ATF. There's a continued controversy over synthetic fluids and the possible effects on "paper" blocking rings. One website quotes a Tremec T56 expert as pre-1997 model T56s should not use synthetics. Are there certain years synthetic AFT should not be used? As Mobil 1 meets Dexron III specificiations, is it acceptable? I'd like to share your response to the "corvetteforum.com" community. Thanks for your help in clarifying this long, on-going issue.
Rob's response:
Hello Steven,
We have tested Mobile 1 and it will not harm the blocker rings weather they are paper or carbon. Mobile 1 is an approved fluid for your application. Please contact us if you require further assistance.
Regards,
Rob
Thanks Rob for going on record.
I'm hoping you can provide a definitive response for an on-going debate on which type of fluids are acceptable in older T56 transmissions. I have a 2000 Chevrolet Corvette with 13k miles. I would like to switch to Mobil 1 synthetic ATF. There's a continued controversy over synthetic fluids and the possible effects on "paper" blocking rings. One website quotes a Tremec T56 expert as pre-1997 model T56s should not use synthetics. Are there certain years synthetic AFT should not be used? As Mobil 1 meets Dexron III specificiations, is it acceptable? I'd like to share your response to the "corvetteforum.com" community. Thanks for your help in clarifying this long, on-going issue.
Rob's response:
Hello Steven,
We have tested Mobile 1 and it will not harm the blocker rings weather they are paper or carbon. Mobile 1 is an approved fluid for your application. Please contact us if you require further assistance.
Regards,
Rob
Thanks Rob for going on record.
08-03-2010, 09:57 AM
#22
Le Mans Master
I have recently gone through the same issue with my early 99 with BW MN6. Two calls to Tremec got the same answer from both Rob and Dale. Rob also added that Mobil 1 was best to reduce any gear whining.
08-03-2010, 11:47 AM
#23
Melting Slicks
you will find countless stories of shifting problems when using synthetic atf on pre 2001 t56 transmissions. the only synthetic atf you can use is amsoil atf or atd. it contains an additive that counteracts the swelling effect of synthetic fluid.
08-03-2010, 12:26 PM
#25
Le Mans Master
The whining sound that I have been experiencing when up shifting around 3000 RPM started when I installed Amsoil synthetic ATF.
08-03-2010, 01:37 PM
#27
Le Mans Master
The MN6 was rebuilt by the orignal owner in 02. The trans has about 40k miles since then. The fluid used was either Mobil 1 or Royal Purple (cannot tell from the receipts that came with the car). When we drained the Amsoil, we took a sample and sent it off for analysis. I'll post results when the analysis comes back.
08-04-2010, 12:25 PM
#28
Racer
Member Since: Mar 2001
Location: Costa Mesa CA
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I switched to Redline ATF in the transmission after multiple "Trans Overtemp" at the the track. The Redline synthetic reduces the friction and lowers the trans temp vs. Dino oil.
My 02 Z06 has 50,000 miles on it and 25% of that is track time. No issues.
My 02 Z06 has 50,000 miles on it and 25% of that is track time. No issues.
