Lopaka69 said:Is there anything I can do to eliminate the notchiness in the shift action? I keep hearing about how the NSX shifter is the best, but my shifter isn't smooth at all.
Lopaka69 said:I tried the hesitation technique and it doesn't help at all. :frown:
I'll try the synchromesh this weekend and post results.
Sorry to bump this old topic but I feel that this is important relation information to share.
I recently switched to GM Synchromesh to solve the notchyness issue (Reading up on everyone's responses to it) and it worked amazinging but I was informed by LarryB that it was bad for the 5spd differential as he had serviced an NSX that used that cocktail tranny blend.
So I ended up going back to Honda "White cap" and all its notchy goodness. (All that tranny fluid down the drain.)
Recap: Don't use GM Synchromesh on a 5spd tranny because it wears down the differential. GM Synchromesh works well though for getting rid of the notchyness. 6spds are fine with the blend.
Recap: Don't use GM Synchromesh on a 5spd tranny because it wears down the differential.
I was searching for the GM MTF parts numbers and found this thread.
After using the GM synchromesh blend on my '92 5-speed with the clutch-type LSD for about 40k miles, then Amsoil MTF for another 20k miles, then finally Honda white-cap MTF for about 5k miles, I can assure you that IS NOT the case. Perhaps that other NSX had some issues to it, but it shouldn't have been because of the GM MTF.
My LSD breakaway torque is on the high side of the SM spec, and all of my LSD clutch discs measure basically brand new... even with 128k miles total on the transmission.
See post 21 of this thread for proof:
http://www.nsxprime.com/forum/showthread.php/203689-Need-a-new-clutch-Considerations-for-older-cars-or-high-mileage-ones?p=1954314#post1954314
I'm putting GM Synchromesh back in. The transmission works the best with that fluid. Synchros are smooth as butter in all temps, there is apparently zero effect on the LSD function, and it is a synthetic blend that seems to last longer than Honda white cap MTF. The only downside is that it costs more, but it's a no-brainer to use it.
i used a 50/50 ratio,shifting is very smooth
I am also using the GM synchromesh cocktail on my '95 (in the standard 2/3 regular 1/3 friction modified proportion) and I agree with other guys on here, shifting is much smoother with it, and I will never use anything else.
I'm very picky about what I use in my car, and don't use anything non-oem unless I first get a comfort level that it's better. The synchromesh cocktail was recommended by a number of experienced NSX mechanics and owners, and passes that test.
I had originally tried 50/50 on the advice of one mechanic. Later, on the advice of another experienced NSX mechanic I went to the 2/3 1/3 ratio, and the 1/3 is the friction modified, I double-checked my work order. That is my understanding of the "standard" cocktail.
There does appear to be some confusion on the ratio, and I have seen posts where some used 2/3 of the friction modified. When I first got the car 9 years ago, one mechanic recommended straight synchromesh, no friction modified at all.
Mac Attack,
Thanks for posting this. Your data would for sure discount my previous thread input. The SyncroMesh cocktail, originated well over 10 years ago, and I was cautioned then by a former NSX trained tech, no-go for the early dif. Your data certainly disputes that theory. Not quite sure I will use it with 1991-94 difs, but your data is certainly compelling.
Thanks,
LarryB
That is intersting and also may be why there is some uncertainly. I was taught 2 friction modified/1 regular, and not to use it with 1991-94 dif. Maybe the difference is using 1 friction modifed/2 regular for the 1991-94 dif? Mac Attack: what are your ratios?