2004 Corvette 6 speed fluid change?? Please Help
Melting Slicks
Joined: Jun 2013
Posts: 3,473
Likes: 691
From: West Virginia
GM Synchromesh Fluid is different from GM Manual Transmission Fluid, BTW. It and the Pennzoil Synchromesh fluid were designed for the New Venture manual transmissions; MTF is essentially the old GM Dex III and is what the Tremecs need.
Anyway. As others have noted, GM says Dex VI is a absolute no-no in manual trannies, and I for one am not going to risk my transmission to try to prove them wrong.
Last edited by jackthelad; Mar 7, 2016 at 07:32 PM.
Safety Car
Joined: Jan 2015
Posts: 3,830
Likes: 394
From: Rocky Mountains
I changed mine last summer and used the GM recommended 88861800 Manual Transmission and Transfer Case Fluid. It looks just like normal red ATF fluid. It made a big improvement. I can't believe the owner's manual says the manual transmission fluid is good for life. It became much easier to find reverse on a cold start. I'll change it again in a couple years.
Melting Slicks
Joined: Jun 2013
Posts: 3,473
Likes: 691
From: West Virginia
I changed mine last summer and used the GM recommended 88861800 Manual Transmission and Transfer Case Fluid. It looks just like normal red ATF fluid. It made a big improvement. I can't believe the owner's manual says the manual transmission fluid is good for life. It became much easier to find reverse on a cold start. I'll change it again in a couple years.
p.s. I think when they say "for life", they really mean until it is out of warranty.........
Melting Slicks
Joined: Jun 2013
Posts: 3,473
Likes: 691
From: West Virginia
Manual trannies need DEX III or equivalent.
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
