Trans fluid
Thread Starter
Burning Brakes
Joined: Oct 2005
Posts: 1,020
Likes: 18
From: Anderson SC
Trans fluid
I need to add some transmission fluid to my manual tranny. Besides the obvious "drain and replace with better fluid" option, what can I buy off the shelf at the local parts store that is the same as what's in there from the factory?
Burning Brakes
Joined: Nov 2005
Posts: 1,109
Likes: 2
From: Marengo Illinois
Cruise-In VIII Veteran
St. Jude Donor '06
The manual calls for Dexron III ATF.
I just drained and refilled with Red Line D4 last night.
For those who have not done this, I have 32K miles and the fluid looked like used motor oil. I should have done this sooner.
Tim
I just drained and refilled with Red Line D4 last night.
For those who have not done this, I have 32K miles and the fluid looked like used motor oil. I should have done this sooner.
Tim
Thread Starter
Burning Brakes
Joined: Oct 2005
Posts: 1,020
Likes: 18
From: Anderson SC
No that was my C5Z. I actually have a C6 convertible and a C6 coupe and the convertible lost some fluid during a radiator swap and is giving a whine going through the gears so I need to add some fluid. Thanks for the info. 
Le Mans Master
Joined: Jan 2005
Posts: 5,611
Likes: 5
From: Thousand Oaks California
You can buy Mobil 1 Synthetic ATF at PEP Boys and other stores. It meets the Dexron III, spec "H" requirement.
Instructor
Joined: Feb 2009
Posts: 137
Likes: 0
The factory owners manual states the c6 Manaul transmission fluid is lifetime - no replacement schedule??? Why would GM suggest this? How often have other replaced and what replaced with?
Racer
Joined: Mar 2006
Posts: 464
Likes: 2
From: Dallas TX
St. Jude Donor '12, '14-'15, '17, '20
and did the same. Changed it at 34k and it looked like crap(dark brown) with lots of metallic. Should have done it much earlier. I also used the Redline D4 ATF and the is a slight improvement in shift action although mine had always been pretty good.
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Burning Brakes
Joined: Nov 2005
Posts: 1,109
Likes: 2
From: Marengo Illinois
Cruise-In VIII Veteran
St. Jude Donor '06
I've seen 4 or 5 posts on this, so I went for it.
Tim
Instructor
Joined: Feb 2009
Posts: 137
Likes: 0
Makes sense to me. What harm could it do if you are using a compatible fluid. So far, looks like the Redline D4 is the most popular. I have only 10k on my new C6. I think I'll change it out now as I am sure there is some "break in" with the tranny. Why have all those metallic particles floating around in there.
Any feedback on that Z-max tranny additive I see on all the car shows?
Any feedback on that Z-max tranny additive I see on all the car shows?