To GM Synchromesh It or Not?
04-08-2009, 03:38 PM
#41
http://www.ttcautomotive.com/English...ice_Manual.pdf
Page 46. It specifically states what type of fluid to use. Nowhere does it say you can use other lubricants.
to make things even easier..read this thread, actual info from tremec.
https://ls1tech.com/forums/manual-tr...l-support.html
https://ls1tech.com/forums/manual-tr...l-support.html
"-Dexron III is THE most highly recommended all round choice, specifically Texaco/Havoline brand.
-Dexron VI- Still being evaluated and tested, NOT recommended for the T-56 at this time and has caused issues so far in preliminary evaluation.
-Syncromesh- Not really recommended, but can be used in high temp high stress applications(drag racing, very hot climates etc.) since it is thicker than dexron III for some added protection.
-Synthetic- Mobil 1 is the only brand advisable to use and tested by Tremec, can cause shifting issues in colder climates."
the reason people say gm syncromesh(pennzoil) is because:
GM Synchromesh is what is in it from the factory and is a Dextron 3 fluid. Mobil 1 ATF is Dextron 3 compatible.
GM Synchromesh is what is in it from the factory and is a Dextron 3 fluid. Mobil 1 ATF is Dextron 3 compatible.
04-08-2009, 03:45 PM
#42
Aside from the few un-credible facts you have listed just now, and not before I have been the only one to do so. I am no engineer, nor a transmission builder but if you were, I am sure you would have spoken up. But I have invovled with a few transmission builds from T-56's to TH400's and even a few 4L60e's and I would say I have a good understanding.
Your arguing about a sticker on the transmission case, I am now and in the future going to be recommending Synchromesh which goes against what the sticker says.
I'm not trying to get personal here, and I don't want you to take this discussion the wrong way, its merely that, a discussion. Its just that its in everyone's best interest to have some hard facts behind your reccommendations when giving suggestions to other members.
04-08-2009, 04:08 PM
#43
TECH Fanatic
Thread Starter
iTrader: (1)
Join Date: Aug 2007
Posts: 1,613
Likes: 0
Received 0 Likes
on
0 Posts
Well this thread went further then anticipated!
So basically even Tremec doesn't fully neglect GM Synchromesh and actually states its good for "higher temperatures" due to it being thicker than dexron III. Now im starting to think that GM synchromesh would be good for me seeing as I only drive the car during the summer evenings.
So basically even Tremec doesn't fully neglect GM Synchromesh and actually states its good for "higher temperatures" due to it being thicker than dexron III. Now im starting to think that GM synchromesh would be good for me seeing as I only drive the car during the summer evenings.
04-08-2009, 04:53 PM
#44
Well this thread went further then anticipated!
So basically even Tremec doesn't fully neglect GM Synchromesh and actually states its good for "higher temperatures" due to it being thicker than dexron III. Now im starting to think that GM synchromesh would be good for me seeing as I only drive the car during the summer evenings.
So basically even Tremec doesn't fully neglect GM Synchromesh and actually states its good for "higher temperatures" due to it being thicker than dexron III. Now im starting to think that GM synchromesh would be good for me seeing as I only drive the car during the summer evenings.
GM Synchromesh - "Not really reccommended"
Do you have shifting issues when the trans is hot?? All the issues I've had are when the trans is cold, the warmer it gets the better it seems to get. I used to get gear clash all the time when it was cool/cold out before I rebuilt my transmission.
Whe my trans is fully warmed up, it shifts awesome, no clash or notchiness. Thats with Mobil 1 Synthetic ATF.
04-08-2009, 09:18 PM
#45
Launching!
iTrader: (11)
Join Date: Nov 2005
Location: Maryville, IL
Posts: 264
Likes: 0
Received 0 Likes
on
0 Posts
Per Tremec:
GM Synchromesh - "Not really reccommended"
Do you have shifting issues when the trans is hot?? All the issues I've had are when the trans is cold, the warmer it gets the better it seems to get. I used to get gear clash all the time when it was cool/cold out before I rebuilt my transmission.
Whe my trans is fully warmed up, it shifts awesome, no clash or notchiness. Thats with Mobil 1 Synthetic ATF.
GM Synchromesh - "Not really reccommended"
Do you have shifting issues when the trans is hot?? All the issues I've had are when the trans is cold, the warmer it gets the better it seems to get. I used to get gear clash all the time when it was cool/cold out before I rebuilt my transmission.
Whe my trans is fully warmed up, it shifts awesome, no clash or notchiness. Thats with Mobil 1 Synthetic ATF.
like in the quote
-Syncromesh- Not really recommended, but can be used in high temp high stress applications(drag racing, very hot climates etc.) since it is thicker than dexron III for some added protection.
directly from tremec.
i say if you should just call tremec and ask them and post up since you don't agree with anyone.
04-08-2009, 09:55 PM
#46
Launching!
iTrader: (25)
Join Date: Jan 2006
Location: Hamilton Twp, NJ
Posts: 233
Likes: 0
Received 0 Likes
on
0 Posts
Not to further muddy the water, but I have a Tremec TKO 600 (bought new from Keisler) in my 70 Nova and it cleary states in the destruction manual to run GM synchomesh and gives the GM part number, which is the same as Pennzoil Sychromesh. So in that tranny I run what they recommend. I think it goes so far as to say NOT to run ATF, I think.
In my 99 formula/M6 which has the big Dexron III sticker on the side of the tranny I run Redline D4.
No issues either place......go figure....
In my 99 formula/M6 which has the big Dexron III sticker on the side of the tranny I run Redline D4.
No issues either place......go figure....
04-08-2009, 10:01 PM
#47
-Synthetic- Mobil 1 is the only brand advisable to use and tested by Tremec, can cause shifting issues in colder climates.
04-08-2009, 10:34 PM
#48
Launching!
iTrader: (11)
Join Date: Nov 2005
Location: Maryville, IL
Posts: 264
Likes: 0
Received 0 Likes
on
0 Posts
all arguing aside,
it all depends on the driver and what feels good to him, try out different fluids and see what you like, or see if someone has a certain fluid in his car and compare it to yours.
it all depends on the driver and what feels good to him, try out different fluids and see what you like, or see if someone has a certain fluid in his car and compare it to yours.
04-09-2009, 06:32 AM
#50
And what un-credible facts have I listed?? Please, do tell. Everything I said is either first hand knowledge, or straight from the manufacturer.
Use Synchromesh for yourself all you want. But its not good practice to reccommend alternative fluids to other members when you have no hard facts or credible information available to back up your choice, just that you think it shifts better.
I'm not trying to get personal here, and I don't want you to take this discussion the wrong way, its merely that, a discussion. Its just that its in everyone's best interest to have some hard facts behind your reccommendations when giving suggestions to other members.
Use Synchromesh for yourself all you want. But its not good practice to reccommend alternative fluids to other members when you have no hard facts or credible information available to back up your choice, just that you think it shifts better.
I'm not trying to get personal here, and I don't want you to take this discussion the wrong way, its merely that, a discussion. Its just that its in everyone's best interest to have some hard facts behind your reccommendations when giving suggestions to other members.
Yet nothing from you. Everyone has first hand knowledge including me but I guess mine is not as good as yours.
Yet again your 1st hand knowledge is looking at a transmission case.
I absolutely will recommend Synchromesh everytime it is asked, that you can rest assured about.
04-09-2009, 06:34 AM
#51
Launching!
iTrader: (11)
Join Date: Nov 2005
Location: Maryville, IL
Posts: 264
Likes: 0
Received 0 Likes
on
0 Posts
Again, I posted at least links. Which included data on the oil analysis.
Yet nothing from you. Everyone has first hand knowledge including me but I guess mine is not as good as yours.
Yet again your 1st hand knowledge is looking at a transmission case.
I absolutely will recommend Synchromesh everytime it is asked, that you can rest assured about.
Yet nothing from you. Everyone has first hand knowledge including me but I guess mine is not as good as yours.
Yet again your 1st hand knowledge is looking at a transmission case.
I absolutely will recommend Synchromesh everytime it is asked, that you can rest assured about.
agreed
04-10-2009, 06:27 PM
#52
TECH Fanatic
Thread Starter
iTrader: (1)
Join Date: Aug 2007
Posts: 1,613
Likes: 0
Received 0 Likes
on
0 Posts
I didnt expect if to be a pissing match here, I just simply asked what most of you run and how you like it. Half are saying dexron and the other half synchromesh. I wish it were easier, like when i had my SHO, everyone recommended to run synchromesh in that tranny. Oh well, cant win them all. btw whats thicker, dexron II or mobil 1 ATF?
04-11-2009, 07:44 PM
#53
Launching!
iTrader: (28)
Join Date: Sep 2005
Location: Bay Area California
Posts: 291
Likes: 0
Received 0 Likes
on
0 Posts
I just put castrol non-syn ATF in mine @70k and it shifts smoother. The fluid that was in there smelt burnt, looked dirty, and you could see tons of tiny golden sparkles.
04-12-2009, 11:41 AM
#55
04-12-2009, 08:38 PM
#57
I didnt expect if to be a pissing match here, I just simply asked what most of you run and how you like it. Half are saying dexron and the other half synchromesh. I wish it were easier, like when i had my SHO, everyone recommended to run synchromesh in that tranny. Oh well, cant win them all. btw whats thicker, dexron II or mobil 1 ATF?
10-14-2009, 01:35 PM
#58
FWIW I hated synchromesh. When I tried it out suddenly my t56 ran crazy hot. It was like the heat of a thousand suns coming through the transmission tunnel. (Side note: this is an RX7 - LS1 swap so my insulation may be different that yours.) However, I lliterally couldn't leave my leg against the side of the tunnel without pain from the heat.
So then 1,000 miles later I pulled the fluid. It came out so weird looking and separated that I took a picture of the old synchromesh in the pan.
The part that really got me was all the gold speckles of metal particles in the fluid. I switched to Mobil 1 ATF and temps are back to normal plus it shifts smoother than the synchromesh did.
Screw that crap. Synchromesh is a bad idea in a t56.
10-15-2009, 08:04 AM
#59
Bumping an old thread because I have a bone to pick.
FWIW I hated synchromesh. When I tried it out suddenly my t56 ran crazy hot. It was like the heat of a thousand suns coming through the transmission tunnel. (Side note: this is an RX7 - LS1 swap so my insulation may be different that yours.) However, I lliterally couldn't leave my leg against the side of the tunnel without pain from the heat.
So then 1,000 miles later I pulled the fluid. It came out so weird looking and separated that I took a picture of the old synchromesh in the pan.
The part that really got me was all the gold speckles of metal particles in the fluid. I switched to Mobil 1 ATF and temps are back to normal plus it shifts smoother than the synchromesh did.
Screw that crap. Synchromesh is a bad idea in a t56.
FWIW I hated synchromesh. When I tried it out suddenly my t56 ran crazy hot. It was like the heat of a thousand suns coming through the transmission tunnel. (Side note: this is an RX7 - LS1 swap so my insulation may be different that yours.) However, I lliterally couldn't leave my leg against the side of the tunnel without pain from the heat.
So then 1,000 miles later I pulled the fluid. It came out so weird looking and separated that I took a picture of the old synchromesh in the pan.
The part that really got me was all the gold speckles of metal particles in the fluid. I switched to Mobil 1 ATF and temps are back to normal plus it shifts smoother than the synchromesh did.
Screw that crap. Synchromesh is a bad idea in a t56.
I will repost this from the other post you made......
^ You had transmission issues, not fluid issues. This stuff is the same exact thing that GM bottles up and sells at the dealership. I have had this for 2 seasons since I did my first clutch swap. It was markedly improved over factory ATF which is put in the transmission.
Frijolee- I would pull your trans and inspect, I also would have you make sure your donut magnets are glued in and collecting any shavings. All trans have some metal floating around, the 2 large magnets collect most of it.
For anyone else, do a simple google search and there are quite a few different car enthusiest of different cars and backgrounds that seem to be quite favorable to the fluid.
The following users liked this post:
NovaNut21 (05-20-2020)
