# Best Manual Tranny Fluid? **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [September 7, 2006, 10:16am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806 "2006-09-07T10:16:56Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![HaNnIBaL64](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/hannibal64/32/5954_2.png) [@HaNnIBaL64](https://forums.speedlife.net/u/HaNnIBaL64)\ **Post date:** [September 7, 2006, 10:16am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/1 "2006-09-07T10:16:56Z")
whats the best stuff? Cars got 90k on it now and i havent changed the tranny fluid since i bought it. What would be the best stuff to put in? GM synchro mesh? I have no clue. ---
**Author:** ![Quik](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/quik/32/5979_2.png) [@Quik](https://forums.speedlife.net/u/Quik)\ **Post date:** [September 7, 2006, 10:20am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/2 "2006-09-07T10:20:33Z")
GM ATF is all you use!!! ---
**Author:** ![Pewter](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pewter/32/5936_2.png) [@Pewter](https://forums.speedlife.net/u/Pewter)\ **Post date:** [September 7, 2006, 10:25am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/3 "2006-09-07T10:25:48Z")
> [@What to put on my crackers thread?](https://forums.speedlife.net/t/what-to-put-on-my-crackers-thread/24129/22): > > GM ATF is all you use!!! ---
**Author:** ![NOTLUZN](https://avatars.discourse-cdn.com/v4/letter/n/da6949/32.png) [@NOTLUZN](https://forums.speedlife.net/u/NOTLUZN)\ **Post date:** [September 7, 2006, 10:28am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/4 "2006-09-07T10:28:01Z")
gm syncro mesh or mobil 1 ---
**Author:** ![Pewter](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pewter/32/5936_2.png) [@Pewter](https://forums.speedlife.net/u/Pewter)\ **Post date:** [September 7, 2006, 10:33am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/5 "2006-09-07T10:33:03Z")
> [@NBC Heroes](https://forums.speedlife.net/t/nbc-heroes/20762/67): > > gm syncro mesh or mobil 1 gm syncro mesh yes,mobil one no ---
**Author:** ![HaNnIBaL64](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/hannibal64/32/5954_2.png) [@HaNnIBaL64](https://forums.speedlife.net/u/HaNnIBaL64)\ **Post date:** [September 7, 2006, 11:03am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/6 "2006-09-07T11:03:23Z")
> [@What to put on my crackers thread?](https://forums.speedlife.net/t/what-to-put-on-my-crackers-thread/24129/22): > > GM ATF is all you use!!! Isnt ATF for autos? ---
**Author:** ![Pewter](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pewter/32/5936_2.png) [@Pewter](https://forums.speedlife.net/u/Pewter)\ **Post date:** [September 7, 2006, 11:04am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/7 "2006-09-07T11:04:32Z")
most sticks use it now ---
**Author:** ![HaNnIBaL64](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/hannibal64/32/5954_2.png) [@HaNnIBaL64](https://forums.speedlife.net/u/HaNnIBaL64)\ **Post date:** [September 7, 2006, 11:06am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/8 "2006-09-07T11:06:37Z")
> [@YESSSS ASTON MARTIN](https://forums.speedlife.net/t/yessss-aston-martin/24153/2): > > most sticks use it now dunno if i could trust the fact the i’m putting atf in it… kinda scares me how much gm syncro cost at the dealer? ---
**Author:** ![imported\_SINISTER](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/imported_sinister/32/5970_2.png) [@imported\_SINISTER](https://forums.speedlife.net/u/imported_SINISTER)\ **Post date:** [September 7, 2006, 11:06am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/9 "2006-09-07T11:06:44Z")
penzoil syncro mesh same as gm but cheeper ---
**Author:** ![Pewter](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pewter/32/5936_2.png) [@Pewter](https://forums.speedlife.net/u/Pewter)\ **Post date:** [September 7, 2006, 11:07am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/10 "2006-09-07T11:07:11Z")
> [@Dont drive on the ice V. Irondequait Bay....](https://forums.speedlife.net/t/dont-drive-on-the-ice-v-irondequait-bay/24139/38): > > penzoil syncro mesh > > same as gm but cheeper ---
**Author:** ![HaNnIBaL64](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/hannibal64/32/5954_2.png) [@HaNnIBaL64](https://forums.speedlife.net/u/HaNnIBaL64)\ **Post date:** [September 7, 2006, 11:08am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/11 "2006-09-07T11:08:40Z")
> [@Dont drive on the ice V. Irondequait Bay....](https://forums.speedlife.net/t/dont-drive-on-the-ice-v-irondequait-bay/24139/38): > > penzoil syncro mesh > > same as gm but cheeper pimp autozone here i come! ---
**Author:** ![BlkP42E](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/blkp42e/32/5938_2.png) [@BlkP42E](https://forums.speedlife.net/u/BlkP42E)\ **Post date:** [September 7, 2006, 11:22am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/12 "2006-09-07T11:22:52Z")
Synchromesh ftw ---
**Author:** ![Toast](https://avatars.discourse-cdn.com/v4/letter/t/6f9a4e/32.png) [@Toast](https://forums.speedlife.net/u/Toast)\ **Post date:** [September 7, 2006, 11:37am UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/13 "2006-09-07T11:37:52Z")
Redline MTL. Been in my tranny for about 4 years now, no problems. ---
**Author:** ![KeithO](https://avatars.discourse-cdn.com/v4/letter/k/4bbf92/32.png) [@KeithO](https://forums.speedlife.net/u/KeithO)\ **Post date:** [September 7, 2006, 12:42pm UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/14 "2006-09-07T12:42:58Z")
My T56 on my LT1 Firebird requires ATF according to the GM spec. I run (road racing) Red Line D4 ATF and like it. ---
**Author:** ![HaNnIBaL64](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/hannibal64/32/5954_2.png) [@HaNnIBaL64](https://forums.speedlife.net/u/HaNnIBaL64)\ **Post date:** [September 7, 2006, 12:56pm UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/15 "2006-09-07T12:56:51Z")
i think im gonna go with the penzoil. itas like 6 dollars a bottle. ---
**Author:** ![Shaggy](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/shaggy/32/5945_2.png) [@Shaggy](https://forums.speedlife.net/u/Shaggy)\ **Post date:** [September 7, 2006, 1:44pm UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/16 "2006-09-07T13:44:51Z")
> [@Turbotax/IRS Rant](https://forums.speedlife.net/t/turbotax-irs-rant/24140/12): > > Synchromesh ftw ---
**Author:** ![beat90tsi](https://avatars.discourse-cdn.com/v4/letter/b/43a26b/32.png) [@beat90tsi](https://forums.speedlife.net/u/beat90tsi)\ **Post date:** [September 7, 2006, 2:21pm UTC](https://forums.speedlife.net/t/best-manual-tranny-fluid/184806/17 "2006-09-07T14:21:50Z")
I didn’t see what kind of car you have, but it depends on the tranny. Just make sure you’re using the right one, GL3, GL4, GL5, whichever yours takes. I know putting GL5 in a DSM tranny is bad juju because the synchros are brass, and some of the GL5 additives are corrosive to them.