Early 99 M6 Trans Fluid Recommendation?
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 6,273
Likes: 14
From: Austin TX
Early 99 M6 Trans Fluid Recommendation?
I recently bought a July 98 build date 99 M6 Convertible. I'm the third owner. Based on several threads, I think the trans is a Borg Warner M6 with paper blockers. The trans has about 50k of mixed city and freeway driving. It has ten or less quarter passes.
As a precaution, I changed the fluids soon after purchase. On the recommendation of my local Corvette speed shop (no bubb as here), I installed Amsoil ATF the M6. I don't know what brand was drained out but it had no indication of burn or ground gears. After 100 miles or so, I am experiencing a high pitched gear whine when upshifting from, say, first to second at 3500 RPM.
Suspecting the wrong fluid, I have searched several threads to try to find the correct trans fluid. Some say that pre 2000 M6s should use only Dexron III or its replacement, Manual Transmission and Transfer Case fluid, part #88861800 from GM. Others with early C5s swear by Mobil 1 synthetic. Most with later C5s and C6s use synthetis from Mobil, Amsoil, Penzoil, etc.
Is there a definitive recommendation for M6 trans fluid for early C5 Borg Warner transmissions?
Your assistance appreciated.
W.
As a precaution, I changed the fluids soon after purchase. On the recommendation of my local Corvette speed shop (no bubb as here), I installed Amsoil ATF the M6. I don't know what brand was drained out but it had no indication of burn or ground gears. After 100 miles or so, I am experiencing a high pitched gear whine when upshifting from, say, first to second at 3500 RPM.
Suspecting the wrong fluid, I have searched several threads to try to find the correct trans fluid. Some say that pre 2000 M6s should use only Dexron III or its replacement, Manual Transmission and Transfer Case fluid, part #88861800 from GM. Others with early C5s swear by Mobil 1 synthetic. Most with later C5s and C6s use synthetis from Mobil, Amsoil, Penzoil, etc.
Is there a definitive recommendation for M6 trans fluid for early C5 Borg Warner transmissions?
Your assistance appreciated.
W.
Racer
Joined: Jul 2010
Posts: 262
Likes: 2
From: Shawnee Kansas
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1999 Chevrolet Corvette V8-5.7L VIN G
Vehicle Level Maintenance Fluids Fluid - M/T Service and Repair Manual Transmission Fluid Level Check (Domestic)
Manual Transmission Fluid Level Check (Domestic)
Inspection Procedure
Raise and suitably support the vehicle; ensure that the vehicle is level. Refer to Vehicle Lifting.
Clean any dirt from around the fill plug.
Remove the fill plug from the transmission.
Check that the transmission fluid level is even with the bottom of the fill plug hole.
Add Dexron(R) III transmission fluid, if necessary. Notice: Refer to Fastener Notice in Service Precautions.
Install the fill plug to the transmission.
Tighten the manual transmission fill plug to 27 Nm (20 ft. lbs.) .
Lower the vehicle.
© 2010 ALLDATA LLC. All rights reserved.
Terms of Use
Select Vehicle | New TSBs | Technician's Reference Component Search:
1999 Chevrolet Corvette V8-5.7L VIN G
Vehicle Level Maintenance Fluids Fluid - M/T Service and Repair Manual Transmission Fluid Level Check (Domestic)
Manual Transmission Fluid Level Check (Domestic)
Inspection Procedure
Raise and suitably support the vehicle; ensure that the vehicle is level. Refer to Vehicle Lifting.
Clean any dirt from around the fill plug.
Remove the fill plug from the transmission.
Check that the transmission fluid level is even with the bottom of the fill plug hole.
Add Dexron(R) III transmission fluid, if necessary. Notice: Refer to Fastener Notice in Service Precautions.
Install the fill plug to the transmission.
Tighten the manual transmission fill plug to 27 Nm (20 ft. lbs.) .
Lower the vehicle.
© 2010 ALLDATA LLC. All rights reserved.
Terms of Use
Melting Slicks
Joined: Aug 2003
Posts: 2,786
Likes: 7
From: Iowa
my understanding is that synthetic fluid will destroy the paper blockers and result in needing a new transmission. use Dextron III. Synthetic works well in the newer tremec transmissions but not the older ones.
Racer
Joined: Jul 2010
Posts: 262
Likes: 2
From: Shawnee Kansas
Home | Account | Contact ALLDATA | Log Out | Help COTTMAN TRANSMISSION
Select Vehicle | New TSBs | Technician's Reference Component Search:
1999 Chevrolet Corvette V8-5.7L VIN G
Vehicle Level Maintenance Fluids Fluid - A/T Technical Service Bulletins A/T - DEXRON(R) VI Fluid Availability
A/T - DEXRON(R) VI Fluid Availability
Bulletin No.: 04-07-30-037B
Date: June 12, 2006
INFORMATION
Subject:
Release of DEXRON(R) VI Automatic Transmission Fluid (ATF) (Dex VI is full Syn)
Models:
2007 and Prior Passenger Cars and Light Duty Trucks
2003-2007 HUMMER H2
2006-2007 HUMMER H3
2005-2007 Saturn Relay
2005 and Prior Saturn L-Series
2005-2007 Saturn ION
2005-2007 Saturn VUE with 4T45-E
2005-2007 Saab 9-7X
Except 2007 and Prior Chevrolet Aveo, Epica, Equinox, Optra
Except 2007 and Prior Pontiac Torrent, Vibe, Wave
Except 2003-2005 Saturn ION with CVT or AF23 Only
Except 1991-2002 Saturn S-Series
Except 2007 and Prior Saturn VUE with CVT, AF33 or 5AT (MJ7/MJ8) Transmission Only
Supercede:
This bulletin is being updated with the 2007 model year. Please discard Corporate Bulletin Number 04-07-30-037A (Section 07 - Transmission/Transaxle).
DEXRON(R)-VI ATF
General Motors Powertrain has recently upgraded to DEXRON(R)-VI ATF with the start of 2006 vehicle production.
Only 2005 and prior models that currently use DEXRON(R)-III may use DEXRON(R)-VI as a replacement.
All 2006 and future models that use DEXRON(R)-VI are to be serviced with DEXRON(R)-VI fluid only.
DEXRON(R)-VI is an improvement over DEXRON(R)-III in the areas shown.
2006-2007 Transmission Fill and Cooler Flushing
Some new applications of the 6L80 six speed transmission will require the use of J 45096 - Flushing and Flow Tester to accomplish transmission fluid fill. It is highly recommended that the clean oil reserve of the machine be purged of DEXRON(R)-III and filled with DEXRON(R)-VI.
Parts Information
Disclaimer
© 2010 ALLDATA LLC. All rights reserved.
Terms of Use
Select Vehicle | New TSBs | Technician's Reference Component Search:
1999 Chevrolet Corvette V8-5.7L VIN G
Vehicle Level Maintenance Fluids Fluid - A/T Technical Service Bulletins A/T - DEXRON(R) VI Fluid Availability
A/T - DEXRON(R) VI Fluid Availability
Bulletin No.: 04-07-30-037B
Date: June 12, 2006
INFORMATION
Subject:
Release of DEXRON(R) VI Automatic Transmission Fluid (ATF) (Dex VI is full Syn)
Models:
2007 and Prior Passenger Cars and Light Duty Trucks
2003-2007 HUMMER H2
2006-2007 HUMMER H3
2005-2007 Saturn Relay
2005 and Prior Saturn L-Series
2005-2007 Saturn ION
2005-2007 Saturn VUE with 4T45-E
2005-2007 Saab 9-7X
Except 2007 and Prior Chevrolet Aveo, Epica, Equinox, Optra
Except 2007 and Prior Pontiac Torrent, Vibe, Wave
Except 2003-2005 Saturn ION with CVT or AF23 Only
Except 1991-2002 Saturn S-Series
Except 2007 and Prior Saturn VUE with CVT, AF33 or 5AT (MJ7/MJ8) Transmission Only
Supercede:
This bulletin is being updated with the 2007 model year. Please discard Corporate Bulletin Number 04-07-30-037A (Section 07 - Transmission/Transaxle).
DEXRON(R)-VI ATF
General Motors Powertrain has recently upgraded to DEXRON(R)-VI ATF with the start of 2006 vehicle production.
Only 2005 and prior models that currently use DEXRON(R)-III may use DEXRON(R)-VI as a replacement.
All 2006 and future models that use DEXRON(R)-VI are to be serviced with DEXRON(R)-VI fluid only.
DEXRON(R)-VI is an improvement over DEXRON(R)-III in the areas shown.
2006-2007 Transmission Fill and Cooler Flushing
Some new applications of the 6L80 six speed transmission will require the use of J 45096 - Flushing and Flow Tester to accomplish transmission fluid fill. It is highly recommended that the clean oil reserve of the machine be purged of DEXRON(R)-III and filled with DEXRON(R)-VI.
Parts Information
Disclaimer
© 2010 ALLDATA LLC. All rights reserved.
Terms of Use
