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Old 05-13-2016, 01:05 PM
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what fluid goes into a manual transmission

Old 01-26-2010, 08:24 PM
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Default what fluid goes into a manual transmission

what fluid goes into a manual transmission? i am totally clueless and confused. i have tranny leak, so the fluid is low. want to use lucas or bars tranny stop leak, but no one knows for sure including me what fluid goes in the transmission? i have a hayes book, it says dextron II. A mechanic at my work place told me differential oil, like 90w or something? i went to a 10 minute oil change garage, they say the tranny takes regular 10w30 or 10w40 motor oil? i was reading through the forum and some mention dextron III or atf fluid. I am the fourth owner, so the manual is long gone. can someone tell me what tranny oil to use and what tranny stop leak to use. leaking through seals
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Old 01-26-2010, 08:28 PM
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If it is a T-56 six speed, it takes Dexron III automatic transmission fluid. Yes...a manual transmission that uses automatic transmission fluid.
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Old 01-26-2010, 10:00 PM
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Originally Posted by MeentSS02 View Post
If it is a T-56 six speed, it takes Dexron III automatic transmission fluid. Yes...a manual transmission that uses automatic transmission fluid.
You are correct sir !
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Old 01-26-2010, 10:03 PM
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+999 ATF is the fluid you need, don't put anything else in it, or risk hurting your tranny
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Old 01-26-2010, 10:28 PM
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Water. ...

I kid I kidd... don't do that. It won't work. Anyhow. Ya ATF works. The DEX III and IV are the traditional. Some guys out there are going to a synthetic. Guess thats up to you and how you feel. Don't use motor oil please.
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Old 01-26-2010, 11:08 PM
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Mobil 1 Synthetic ATF is reccommended by most rebuilders and performance shops, thats what I run and I've been happy with it.
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Old 01-27-2010, 04:25 AM
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i'm sorry, i forgot to mention its for a t5 with 89500 miles on it. plus what transmission stop leak do you guys recommend? The gaskets or seals that seperate the transmission from the bellhousing and tailshaft housing, seems always wet to the touch. dropping fluid on the exhaust. Causing a constant burnt oil smell when you are driving and worst when you got the heat and the blower on high.
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Old 01-27-2010, 04:37 AM
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plus quick question. ATF stands for automatic transmission fluid? Dextron I II III and so fourth are all types of automatic transmission fluids, that been developed and improved over the years?
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Old 01-27-2010, 07:45 PM
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Yes atf is automatic trans fluid I believe its dextron III theres a big yellow sticker on the side of the trans that says, or you can run a synthetic i use royal purple but there are other brand out there
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Old 01-28-2010, 05:23 AM
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Thank you all. i appreciate your input and i learn something along the way. Now does anybody have a opinoin on which tranny stop leak to use? lucas transmission fix or bars leak, transmission stop leak?
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Old 01-28-2010, 10:01 AM
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none. Never use that stuff. Fix the leak.
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Old 01-28-2010, 10:34 AM
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X2..fix the leak.

I admire how many different answers were in the first post..people just don't know..
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Old 01-28-2010, 12:05 PM
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Hmm are you sure the oil leaking is from the tranny? Possibly not from the transmission at all and is engine oil.... My car drips enough oil for me to smell oil with the heater on, but not enough to leave any on the ground....go figure...
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Old 01-28-2010, 05:38 PM
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Are you sure you don't smell a burning clutch?
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Old 01-29-2010, 02:13 AM
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i put scnromesh in my t56 in my old 2004 CTS-V..... in my brother T3650 in 2003 Mustang GT we put half 90w half atf..... both still kickin. cady trans has 20k or so put on it since i sold it if i had to guess. stang has 70k on trans and has same fluid... zero problems. thos are my 2 personal experiances. goin m6 in my ws6 right now so would like to now this also so when i fill trans up after swap from a4
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Old 01-29-2010, 02:15 AM
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ps. rear main seal might be leaking.... my 01 ws6 has rear seal leak. never heard of a leaky manuel trans....
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Old 01-29-2010, 07:05 AM
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Yeah check the rear main seal it's a common problem or the front seal on the trans could be leaking too I know mine is and I just replaced the rear seal on my trans
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Old 01-29-2010, 12:19 PM
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eaither my rear main seal on my z28 is leaking or its leaking from the oilpan....I havn't figured it out quite yet....

+1 on rear main seal, or on burning clutch...
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Old 01-30-2010, 08:22 PM
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I use royal purple in mine and it shifts perfect.
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Old 01-30-2010, 08:37 PM
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dex merc III
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