*edit* This post is about the <u>Friction Modified</u> version of GM's Synchromesh. It is NOT about the regular Synchromesh fluid, either from GM or from Pennzoil

Yup. Called up my buddy yesterday at the big local Chevy dealer, looking for some Friction Modified Synchromesh before I pull my engine out. He brought out 3 quarts of the regular Synchromesh, and told me that the Friction Modified version is being phased out.

So I took the regular stuff, and then just as I got down the street aways he called me back and said he found some Friction Modified fluid.

So I went back and decided to buy all 6 quarts they had left, for the most excellent price of $51

So I guess if you use it and want to keep using it, or if you've been wanting to try it, you better call around to your local GM dealers and try to stock up now before they get rid of it.

A little history: I've been using GM Synchromesh Friction Modified fluid in my GS-R transmission for about 100,000 miles now, changing it about every 25K miles or so. My transmission has 260K+ total miles on it, still with all original internals, and it still shifts flawlessly, even with my short shifter, even in single-digit temperatures on cold mornings. It is by far the best fluid I've ever used.

Mods I'm cross-posting this in several forums so that everyone will see it.


Modified by PatrickGSR94 at 7:58 AM 12/28/2007

 

Dang. People will actually have to fix their transmission now. What are the other fluids available?

&lt;-- Always used Honda MTF with no problems. But my '97 GSR only has 72000 miles.

 

yep, the Friction modified stuff isn't even listed in their system anymore.

It's hard for me to say if SM FM is better or the same or not as good as Honda MTF. I bought my car with 90K on it and used Honda MTF for about 70K miles. Then I switched to GM SM FM and have been using that for 100K miles.

It felt to me like shifting was a touch easier when I first made the switch, and the fact that I still have flawless shifts with 260K on the tranny would lead me to believe that GM FM SM is at least as good, if not better, than Honda MTF. But I have no proof of that.

 

Damn this sukks....

 

I was allways curious about it,but I've allways used Honda MTF in my GS-R and with 270k miles it still shifts with no problems.I didn't want to change and have something go wrong.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Fern413 &raquo;</TD></TR><TR><TD CLASS="quote">Damn this sukks.... </TD></TR></TABLE>

X2, time to stock up.

 

And I heard that honda changed their mtf to a different formula that is thin like water.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tasco &raquo;</TD></TR><TR><TD CLASS="quote">And I heard that honda changed their mtf to a different formula that is thin like water. </TD></TR></TABLE>

doubtful... Honda transmissions require a 5w30 viscosity fluid, which is what Honda MTF is. If they made it thinner it wouldn't be 5w30 anymore.

 

If the friction modified isnt available, go with amzoil synchromesh. Its the only other stuff id use besides MTF.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18LS &raquo;</TD></TR><TR><TD CLASS="quote">If the friction modified isnt available, go with amzoil synchromesh. Its the only other stuff id use besides MTF.</TD></TR></TABLE>

+1 for Amsoil.

 

i use royal purple synchromax

 

Since I am lame and have an auto tranny. Could someone tell me what fluid to use in my tranny?
Thanks

Sorry about the thread hijacking

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ooopseyesharted &raquo;</TD></TR><TR><TD CLASS="quote">Since I am lame and have an auto tranny. Could someone tell me what fluid to use in my tranny?
Thanks

Sorry about the thread hijacking </TD></TR></TABLE>

ATF

Edit:
https://honda-tech.com/zerothread?id=48916

 

so what is the diff between HMTF and regular 5w30 or 10w30? a few of my friends use syntec 10w30 and some lucas oil stabilizer and they have been runnin that for a long time on high HP cars and stock trannies. im a noob so forgive me and dont hurt me too bad please.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TomsDC &raquo;</TD></TR><TR><TD CLASS="quote">so what is the diff between HMTF and regular 5w30 or 10w30? a few of my friends use syntec 10w30 and some lucas oil stabilizer and they have been runnin that for a long time on high HP cars and stock trannies. im a noob so forgive me and dont hurt me too bad please.</TD></TR></TABLE>

Honda MTF is a 5w30 fluid, but with friction additives to aid in synchronizer operation (which rely on friction to function properly).

I don't know why in the hell you would want to put oil stabilizer in your transmission, but synthetic motor oil is BAD for a transmission, even worse than conventional motor oil, as synthetic is much too slippery for proper synchronizer operation.

 

Looks like I'm calling Chevy and GM tomorrow to buy what they have left. Thanks Patrick