[Z06] Trannie fluid ?
Thread Starter
Burning Brakes
Joined: Aug 2002
Posts: 830
Likes: 29
From: crestview fl
Trannie fluid ?
Has anybody drained and refilled ther trannie with new 
non-GM type fluid to help the Z shift any smoother? If so, what fluid did you use and what noticable changes did you encounter if any?
Thanks
Mike P
non-GM type fluid to help the Z shift any smoother? If so, what fluid did you use and what noticable changes did you encounter if any?Thanks
Mike P
Premium Supporting Vendor
Joined: Aug 2001
Posts: 5,364
Likes: 38
From: King George VA
Been using AMSOIL ATF in my tranny for the last season and a half. My tranny sees pretty extreme duty and it is still running strong after over 16k total miles, almost four years of use, 10 DE days or so, and something like 27 SCCA T1 races. 
AMSOIL ATF
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AMSOIL ATF
AMSOIL Ordering Information
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C66 Racing #66 NASA ST2, SCCA T2
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C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
Team Owner
Joined: Apr 2001
Posts: 26,794
Likes: 614
From: Elmhurst, IL (West Suburb of Chicago) & Home of MEGA Horsepower
St. Jude Donor '06
Originally Posted by gasboy
redline d4 atf.MUCH smoother shifting.
I agree
' I went the same route about a month ago and am happy with the results!!! 
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Instructor
Joined: May 2004
Posts: 117
Likes: 0
From: Wheaton il
Amsoil here also in trans, diff, and engine...
could not believe the condition of stock fluids at only 700 miles on a new 2004. My friend did the same and fulids looked just as bad on his 2004 with 3600 miles. Noticed improvement in shifting with the 6spd.
Melting Slicks
Joined: Oct 2001
Posts: 2,786
Likes: 22
From: Cary NC
Originally Posted by Cobra4B
I use Amsoil ATF in the trans... I may try Royal Purple Synchromax to see if it lives up to all the hype on here, if not it'll be right back to Amsoil.
And the GM Dexron fluid I pulled out was very dark. Did not have that bright red color to it at all. Must of been fairly dirty even though it is a closed system.
Now if all these aftermarket super fluids do not cause any long term problems with the synchros then life should be good.
