Changing 6 speed tranny fluid
Thread Starter
Melting Slicks
Joined: Jul 2010
Posts: 3,479
Likes: 92
From: Between Tally and Gatorville ,Florida
Changing 6 speed tranny fluid
I'm going to change the fluid on my 99 FRC and I've read where it's not recommended to use Synthetic fluid due to the paper Blocker in the tranny. I don't want to know what fluid you use and why. Or which one you think is best and why
Just interested in why I've read that synthetic will damage the blockers.
Can some one explain to me, in simple terms what the deal is?
Just interested in why I've read that synthetic will damage the blockers.
Can some one explain to me, in simple terms what the deal is?
Last edited by Dale002; Nov 10, 2011 at 08:18 AM.
Le Mans Master
Joined: Aug 2000
Posts: 6,273
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From: Austin TX
I had the same question for my 99 Vert. I called Tremec (which bought Borg Warner which manufactured the 99 MN6) and talked to tech reps. They recommended either Dexron III or Mobil 1. My MN6 has had Mobil 1for several years with no problem.
Others have used other products (Amsoil, Royal Purple, etc) and love 'em but Mobil 1 is fine for me.
Others have used other products (Amsoil, Royal Purple, etc) and love 'em but Mobil 1 is fine for me.
Thread Starter
Melting Slicks
Joined: Jul 2010
Posts: 3,479
Likes: 92
From: Between Tally and Gatorville ,Florida
I had the same question for my 99 Vert. I called Tremec (which bought Borg Warner which manufactured the 99 MN6) and talked to tech reps. They recommended either Dexron III or Mobil 1. My MN6 has had Mobil 1for several years with no problem.
Others have used other products (Amsoil, Royal Purple, etc) and love 'em but Mobil 1 is fine for me.
Others have used other products (Amsoil, Royal Purple, etc) and love 'em but Mobil 1 is fine for me.
Melting Slicks
Joined: Apr 2009
Posts: 2,479
Likes: 36
Mobil 1 ATF seems to be an excellent choice. I've had it in mine for 2 years now and the shifts are smooth and precise. I actually noticed an improvement as soon as I switched. But, keep in mind that the Mobil 1 ATF is a synthetic fluid. However, if the transmission manufacturer says it's OK then go ahead.
Thread Starter
Melting Slicks
Joined: Jul 2010
Posts: 3,479
Likes: 92
From: Between Tally and Gatorville ,Florida
Thread Starter
Melting Slicks
Joined: Jul 2010
Posts: 3,479
Likes: 92
From: Between Tally and Gatorville ,Florida
Mobil 1 ATF seems to be an excellent choice. I've had it in mine for 2 years now and the shifts are smooth and precise. I actually noticed an improvement as soon as I switched. But, keep in mind that the Mobil 1 ATF is a synthetic fluid. However, if the transmission manufacturer says it's OK then go ahead.
Are these just bogus reports?
Tech Contributor
Joined: Jan 2007
Posts: 19,472
Likes: 1,171
From: Dyer, IN
I must agreed with what the manufacture said,but why do some on this forum say that's some synthetic are bad? This is really my question,not which type of fluid to use,but the deal with paper clips and others claiming that some synthetic fluids will ruin the trannys.
Are these just bogus reports?
Are these just bogus reports?
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Thread Starter
Melting Slicks
Joined: Jul 2010
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From: Between Tally and Gatorville ,Florida
Le Mans Master
Joined: Aug 2000
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From: Austin TX
The conversation was over a year ago so my memory is hazy about all of the conversation. I do remember that the tech rep was hesitant to criticize other fluids and their impact on the "paper" blockers. He simply recommended Dexron III or Mobil 1. Suggest you make the same call and see if you get the same answer.
Thread Starter
Melting Slicks
Joined: Jul 2010
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From: Between Tally and Gatorville ,Florida
I always enjoyed reading posts from people that can't help or don't know themself,but feel they have to reply to a thread.
I called Tremec (which bought Borg Warner which manufactured the 99 .They bought them out!!!!
I called Tremec (which bought Borg Warner which manufactured the 99 .They bought them out!!!!
Last edited by Dale002; Nov 9, 2011 at 09:54 AM.
Thread Starter
Melting Slicks
Joined: Jul 2010
Posts: 3,479
Likes: 92
From: Between Tally and Gatorville ,Florida
The conversation was over a year ago so my memory is hazy about all of the conversation. I do remember that the tech rep was hesitant to criticize other fluids and their impact on the "paper" blockers. He simply recommended Dexron III or Mobil 1. Suggest you make the same call and see if you get the same answer.
Tech Contributor
Joined: Jan 2007
Posts: 19,472
Likes: 1,171
From: Dyer, IN
Thread Starter
Melting Slicks
Joined: Jul 2010
Posts: 3,479
Likes: 92
From: Between Tally and Gatorville ,Florida
Thread Starter
Melting Slicks
Joined: Jul 2010
Posts: 3,479
Likes: 92
From: Between Tally and Gatorville ,Florida
No Big deal! My question is asking if anyone knows why some synthetic fluids causes the blocker to have issues. I didn't ask what to use, We've read that synthetic cause blocker issue, but the new owners (Tremac),not the manufacture said it's OK to use synthetic. My question has not been answer.Just been told what fluid to use.
Instructor
Joined: Sep 2006
Posts: 159
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From: Rantoul IL
No Big deal! My question is asking if anyone knows why some synthetic fluids causes the blocker to have issues. I didn't ask what to use, We've read that synthetic cause blocker issue, but the new owners (Tremac),not the manufacture said it's OK to use synthetic. My question has not been answer.Just been told what fluid to use.
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