Syncromesh + Ford Friction Modifier

[MOSHO92]

I know that the syncromesh topic has been beaten to death, but my search didnt really answer my question. Here it is:

I want to make shifting from 1st to 2nd faster and easier. I have a brand new southbend clutch, PP, and TOB, so i seriously doubt that that is the problem.

I Had syncromesh in before the clutch job and may have not seen the positive effects due to the old clutch making shifting difficult.

After the job i just filled the tranny with castrol dextron mercon 3 (or something like that), and now i have trouble shifting at high rpms. Regular driving is fine but high rpm shifts(esspecially 1-2) takes just way too long and far too much effort. It is also a little bit more notchy that before the clutch job.

What i want: Benefiets of syncromesh (no more notchyness(is that a word?)) + quick shifting (some "not too slippery" fluid). So can i mix ford friction modifier with syncromesh or does that sound like a totally idiotic idea???

Thanks for the input!

 

[sdpatt]

You can try the synchromesh, but I believe the Ford friction Modifier would be redundant. It works best with the ATF that is normally used in these boxes. You didn't mention replacing the syncrhonizer blocking rings in the transaxle. These are the wearable parts that are responsible for allowing the shifts to happen without grinding teeth off the synchros. If high rev result in slower shifts or even grinding if you force it, worn friction material in the blocking rings is the cause.

No matter what fluid you fill the box with or what blocking rings are installed, the SHO transaxle has never been a model of smooth, quick shifting. There will always be some notchiness going through neutral and engaging the next gear.

 

[MOSHO92]

Hey Scott, thanks for the reply. I have used a few different types of fluid for this transmission through the life of the car and have found GM's stuff to work the best for me. I did not replace the blocking rings when I replaced the clutch because I wasnt able to afford it at the time. I do plan on giving the tranny a refresh as soon as I have some more funds saved. Until then I am going to try and make the best of what I have. BTW: I dont think the blocking rings are bad yet because, though it may take some serious effort to shift, I have NEVER heard one gear grind.

For now I am going to stick with straight GM Syncromesh and see if it improves the situation. If I dont notice a great improvment I may add the ford friction modifier and go from there.

One last thing. I noticed today at the Chevy dealership that they have a "Friction Modified Syncromesh". I wonder if that could be useful in our application.