Well, I answered my own question, the GM Synchromesh Transmission Fluid 1#12345349 is the standard GM MTF whereas the 1#12377916 is the Friction Modified.

Both will work, however the Friction Modified is what I was looking for.

Thanks everyone, I guess I should have done a search before going down to purchase.

BTW the dealer exchanged the oil without question without the receipt. Saw the new vette as well, damn, it's one sweet ride!!

South Texas Zeniac

 

 

in another thread (I don't have it off hand, you'd have to search), the mobil 1 and all other GL-5 gear oils have high sulfer content which will corrode and eat the brass synchros in the transmission. The transmission in the S2k actually calls for a GL-4 lubricant, and the transmission needs different friction modifiers to help the synchros engage then what you find in GL-5 gear oil. Stick to Honda Manual transmission fluid, its what our tranny was designed for, and is about the same price as mobil 1 (~$7/quart) and available from any honda dealer's parts dept.

even tho mobile 1 75w-90 and honda MTF smell the same, they are actually different because of the sulfer content and friction modifiers.

 

I have heard that the Honda MTF is actually a 10w-30 motor oil with a special blend of friction modifiers. No one really seems to know what is in the Honda MTF.

The Honda MTF works very well for me

 

Redline MTL

 

its not a 10w-30 based oil. the honda MTF and 10w-30 have similar viscosity, but they are different oils with different additives. they feel and smell different.

 

Changed over to GM friction modified, and it . My tranny was very notchy and with the GM fluid she feels a lot better.

Just take two quarts, and call me in the morning if you're notchy. If you have a defective tranny that's smooth, get honda to change her under warranty. Then take two quarts, and call me in morning

 

Yeah...I'm the first to admit...I'm slow to embrace change. But, I've read about some happy people on this site with the change to GMsynchromeshFM in their trannys.

I changed mine today...and I gotta say....it clearly shifts in a noticably smoother way. I've never had the dreaded 1>2 grind, but, prior to the new fluid, I could occasionally feel some notchiness (especially when cold).

Many thanks to Road Rage, Gernby, and others for their thoughts and pursuit of something better.

Now to find some LE607....

 

That was my point. The Honda MTF is simular in viscosity as 10w-30

 

Well I changed over to GM friction modified and so far it seems to shift much smoother, I will give it a few weeks and see if it remains the same.

BTW - My Honda dealer actually recommended the GM Synchromesh FM for the S2000 as an alternative to the Hona MTL.

Mi dos centavos

South Texas Zeniac