What Additives Used in Sychromesh Tranny Fluid.?....

Idrinkmotoroil · May 7, 2004

Most people find that synchromesh tranny fluid works smoothly with synchros and I've experienced it myself with one of my cars with a 5 speed manual tranny. Just wondering what additives they use to cause synchros to work so well. When people do VOA's on tranny fluids they dont seem to have a lot of additves, at least ones we see in voa's. Any info on what synchromesh fluid uses would be cool. thanks.

Joey

JohnBrowning · May 7, 2004

I belive that the latest SYnchromesh is Castrol Syntorque LT. Look for it and you might find your answeres.

MolaKule · May 8, 2004

Sorry Joey,

Many of those components are proprietary and still under patent pending categories and there are about 15 possible candidates to boot.

Any one or more of these 15 candidates could be used in any one synchromesh fluid.

Idrinkmotoroil · May 8, 2004

Molakule, I guess everyone has their secret little formula hugh. It's good to know that though. Are there different Synchromesh formulas out there, I know there is the GM stuff and Penzoil has one, also Mopar has one under their name.

JohnB do you really think its the same as Syntorque ?, I wouldnt have thought so. I was thinking maybe the GM stuff was made by Penzoil and would be the same formula as Penzoil's version or vice-versa. The GM synchromesh I have is made in Canada, I dont think we have a Castrol plant up here, so it might be made by Esso, or PetroCanada.

thanks for the replies guys.

Tremo · May 8, 2004

My car has a Borg Warner "WC" T5 transmission. Of course GM says to only use their proprietary synchro lube in the thing. I took it into a trans shop when it developed a bearing problem. When they finished it up, they refilled it with Redline synthetic ATF. I asked them about it, and they reply that every other manufacturer who puts the T5 in their cars, just fills it with ATF. I then inqquired over on one of the hotrod forums I visit, and they confirmed that everyone there just uses a good ATF in their T5.

Even my wife's Escort uses ATF in it's 5-speed.

Last time I changed the fluid in the T5, I just filled it up with M1 synthetic ATF. It works just fine. No special additives or expensive GM fluid or nuttin'. Just straight M1 ATF.

MolaKule · May 8, 2004

quote:

When they finished it up, they refilled it with Redline synthetic ATF.

I hope they used the "Synthetic High Temp" Ford type F since synchromesh-type fluids are supposed to have a viscosity of 9.0 to 10 cSt @ 100 C.

cousincletus · May 9, 2004

The GM fluid is just under 10 bucks a quart and the Mopar fluid is about 12 bucks. Since both use the NV-3500 in their fullsize trucks I used the GM fluid in my Dodge and saved 4 bucks. Can't tell a difference in the way it shifts and the Chevy dealer is closer to me anyway. I'm assuming that the only difference between the GM and Mopar fluid is the price.

JohnBrowning · May 9, 2004

Castrol claims that Syntorque was designed to solve problems in Syncromesh tranys at the OEM level? THat sonds like all the manualy transmissions that Dodge,Ford and GM have. THese same transmissions seem to have odd ball special lube requirments as well? While it is not concrete evidence it is good enough for me to conect that dots. Also look at the cost of these fluids compared to all other previous Manual trans fluids. $12-$20 a quart compared to $1.89 in the old days for a quart of 75/90 gear lube.

Pensoil Synchromesh is not synthetic. GM synchromesch Red style was semi-synthetic and the blue style is synthic if my memory is right. I belive that the origanal Synchromesh was made by Texaco and that the new Synchromesh II is made by Castrol.

Idrinkmotoroil · May 9, 2004

one thing that always bothers me about ATF is the relatively low viscosity, around 7.5 cst.

MolaKule · May 9, 2004

GM's blue-labelled black bottle Synchromesh Fluid is partially synthetic now.

Mike_dup1 · May 9, 2004

JB

You mention Synchromess II as being blue in color. I have a qt + of GM AutoTrac II transfer case fluid and it blue also. Maybe these are the same product? The AT II is made in Canada per the bottle and is highly toxic as it come with warnings.

Greaser · May 10, 2004

The GM and Mopar fluid is Texaco 1874 fluid.

Greaser · May 10, 2004

http://www.stealth316.com/2-pennzoil-synchromesh.htm

JohnBrowning · May 10, 2004

Mike I think I was wrong. I think I mixed up Autotrac I and II and Synchromesh. SOmetime these things happen!

gerhardb · May 11, 2004

I can tell you that the GM Syncromesh MTL works far better in Honda manual transmission than Honda MTL!

Road Rage · Jun 22, 2004

Facts:
Part 10-4014
88900399
Synchromesh Manual Transmission Fluid (Friction Modified)

Contains a semi-synthetic lubricant compatible for use in NV 1500 transmissions
Reduces transmission component wear

Here is a link to get part numbers for AC Delco lubricants:
http://www.acdelco.com/html/pi_vehcare_lub.htm

What Additives Used in Sychromesh Tranny Fluid.?....

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