Tranny fluid change
Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,298
Likes: 21
From: east taunton ma
Tranny fluid change
Thinking about changing fluid in my 98 coupe manual tranny. My question is can I run the royal purple or should I stay with the factory fill. I heard if you run the synthetic stuff in the older tranny's you'll be replacing it soon. what do you guy's think?
Melting Slicks
Joined: Jul 2005
Posts: 2,572
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From: Rehoboth MA . . . NRA Life Member
St. Jude Donor '06-'07
I use this in my M12 manual transmission and would suspect that you shouldn't have issues either.
Synchromax is recommended for manual transmissions that specify an automatic transmission fluid or motor oil. It is also ideal for 4x4 transfer cases and / or 2-cycle and 4-cycle motorcycle gear boxes.
Synchromax is formulated with Royal Purple's synthetic, proprietary Synerlec additive technology, which offers improved shift quality over a wide temperature range and reduced gear noise.
Synchromax is fully compatible with all types of friction materials and offers excellent corrosion and oxidation protection without affecting the soft metals commonly found in manual transmission synchronizers
Bob
Synchromax is recommended for manual transmissions that specify an automatic transmission fluid or motor oil. It is also ideal for 4x4 transfer cases and / or 2-cycle and 4-cycle motorcycle gear boxes.
Synchromax is formulated with Royal Purple's synthetic, proprietary Synerlec additive technology, which offers improved shift quality over a wide temperature range and reduced gear noise.
Synchromax is fully compatible with all types of friction materials and offers excellent corrosion and oxidation protection without affecting the soft metals commonly found in manual transmission synchronizers
Bob
Drifting
Joined: Sep 2001
Posts: 1,875
Likes: 27
From: Long Beach NY
I have been trying to track down a story about "Paper Spacers" in early C5 manual transmissions. '97-2000
Supposedly certain Synthetic ATF would affect the spacers causing problems. As I recall certain Syn Fluids were safe to use some were not.
Where is EvilTwin when we need him?
This information would definately impact on silvr bulit and his fluid change.
Barrier
Supposedly certain Synthetic ATF would affect the spacers causing problems. As I recall certain Syn Fluids were safe to use some were not.
Where is EvilTwin when we need him?
This information would definately impact on silvr bulit and his fluid change.
Barrier
Former Law Dawg Moderator
Joined: Jan 2005
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From: Eads, Tennessee
CF St. Jude Co-Organizer
St. Jude Donor '05 thru '24
Check with Subdiver here on the forum. He is an Amsoil vendor here and can answer your question. I used Amsoil in mine but it's a '04.
Le Mans Master
Joined: Aug 2002
Posts: 8,222
Likes: 0
From: Norfolk VA
Some of the early LS1 F-body Transmissions had some type of paper filters (or something like that) that didn't like synthetic oil. Pretty sure it was never a problem for the Vettes. Started using RP just over a year ago and am very happy with it.
Racer
Joined: Mar 2003
Posts: 408
Likes: 4
From: Quad Cities IL/IA
I've read that any ATF that is Dexron III compliant is save for a 97-00 transmission.
I just changed my fluid to AMSOIL ATF and the results were AWESOME. Well worth the $33 I spent on the 4qts of fluid.
The car now shifts much, much easier.
I just changed my fluid to AMSOIL ATF and the results were AWESOME. Well worth the $33 I spent on the 4qts of fluid.
The car now shifts much, much easier.
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Verdad Gallardo
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From: King George VA
Originally Posted by Tact
Check with Subdiver here on the forum. He is an Amsoil vendor here and can answer your question. I used Amsoil in mine but it's a '04.
The stickied link on the top of the C5 forum contains all the info you need on the tranny issue with synthetics. Here is a quote from that thread:
Tough shifting
The shifter in manually shifted Corvette's takes a strong arm to get it into gear. You really have to make sure that the shifter is fully in 1st and Reverse, or it will pop out of gear when you let the clutch out. This is not the fault of the car, but the fault of the driver.
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. The following transmission fluids may be unsafe for early transmissions: Redline D4 ATF, Mobil 1 ATF, Royal Purple Max ATF.
Here is info on the AMSOIL ATF.
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AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
