Synchromesh ATF
Thread Starter
Intermediate
Joined: Apr 2005
Posts: 43
Likes: 0
From: Yorba Linda CA
Synchromesh ATF
Want to change the oil in my 6sp manual trans, I have a 2000 coupe. The tech "sticky" recommends staying away from synthetics (like Redline MTL) for 2000 and older C5's. Anyway, dealer wants $16.60 per quart for the Synchromesh. Anyplace to get it cheaper?? Need 4 quarts to do the job. 
Le Mans Master
Joined: Feb 2002
Posts: 5,970
Likes: 20
From: San Marcos Texas
The Sticky states that the Roalpurple scyromax is safe to use.
Manual transmissions -- Replacing the transmission fluid often helps shifting. Early transmissions have paper blocker ring that require Dexron III compatible (usually organic) fluid because some synthetics will destroy the paper blocker rings and subsequently the transmission. Later transmissions, and all rebuilt transmissions, have Kevlar/carbon fiber parts that allow the use of synthetic fluids. I believe the 98-00 transmissions have the paper blocker rings. The safe transmission fluids seem to be: GM Synchromesh PN #12345349, Honda ATF-Z1, Royal Purple Synchromax, Amsoil ATF, O’Reilly Dexron III ATF.
Race Director
Joined: Dec 2002
Posts: 10,233
Likes: 21
From: Baltimore suburbs Maryland
Originally Posted by chriswtx
The Sticky states that the Roalpurple scyromax is safe to use.
Quote:
Manual transmissions -- Replacing the transmission fluid often helps shifting. Early transmissions have paper blocker ring that require Dexron III compatible (usually organic) fluid because some synthetics will destroy the paper blocker rings and subsequently the transmission. Later transmissions, and all rebuilt transmissions, have Kevlar/carbon fiber parts that allow the use of synthetic fluids. I believe the 98-00 transmissions have the paper blocker rings. The safe transmission fluids seem to be: GM Synchromesh PN #12345349, Honda ATF-Z1, Royal Purple Synchromax, Amsoil ATF, O’Reilly Dexron III ATF.
Quote:
Manual transmissions -- Replacing the transmission fluid often helps shifting. Early transmissions have paper blocker ring that require Dexron III compatible (usually organic) fluid because some synthetics will destroy the paper blocker rings and subsequently the transmission. Later transmissions, and all rebuilt transmissions, have Kevlar/carbon fiber parts that allow the use of synthetic fluids. I believe the 98-00 transmissions have the paper blocker rings. The safe transmission fluids seem to be: GM Synchromesh PN #12345349, Honda ATF-Z1, Royal Purple Synchromax, Amsoil ATF, O’Reilly Dexron III ATF.
Last edited by eRiCdWoNg; Jun 16, 2005 at 10:19 AM.
Racer
Joined: Dec 2004
Posts: 405
Likes: 0
From: Virginia Beach Virginia
Originally Posted by chriswtx
The Sticky states that the Roalpurple scyromax is safe to use.
I read this: Mobil 1 Synthetic Automatic Transmission Fluid
Outperforms conventional ATF and meets General Motors' Dexron® III and Ford's Mercon® requirements. Fully synthetic formula that provides outstanding resistance to oil breakdown and deposits under severe duty and high temperatures.
Helps extend transmission life through excellent durability and protection.
For many GM, Ford and import vehicles. Approved for use in vehicles specifying: Dexron III, Dexron IIIE, Dexron
Now approved for H specification, the latest GM Dexron III performance level.
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Le Mans Master
Joined: Feb 2002
Posts: 5,970
Likes: 20
From: San Marcos Texas
I put Mobil 1 Synthetic Automatic Transmission Fluid. I didn't quiet like the way the shifts felt so I drained 1 quart of fluid and added 1 quart of Roalpurple syncromax and the shifts are much smoother 
