GM Synchromesh Friction Modified
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From: Alpharetta, Ga/Auburn, Al
Originally Posted by forsaken,Aug 24 2004, 08:14 AM
"GM Synchromesh is non-friendly to yellow metals. While your transmission will shift better, if you have bronze synchros they will wear 50% faster. If you have bronze synchros, use a GL-4 based fluid."
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From: Midlothian
Originally Posted by 1.8t,Aug 25 2004, 01:08 PM
Can anyone confirm/deny this???
There is absolutely no truth to that statement. None of the chemical compounds in the GMS or GMS FM will do any harm to yellow metals. Without exception in my experience, that damage only occurs wehen GL-5 gear lubes are used that contain active sulfur EP compounds. There are none in ANY of the popular fluids: GMS, GMSFM, Red Line MT series, or Honda's MTF. Repeat: N-O-N-E.
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From: LA County
Originally Posted by Road Rage,Aug 25 2004, 05:20 PM
Please rad my full analysis already posted.
There is absolutely no truth to that statement. None of the chemical compounds in the GMS or GMS FM will do any harm to yellow metals. Without exception in my experience, that damage only occurs wehen GL-5 gear lubes are used that contain active sulfur EP compounds. There are none in ANY of the popular fluids: GMS, GMSFM, Red Line MT series, or Honda's MTF. Repeat: N-O-N-E.
There is absolutely no truth to that statement. None of the chemical compounds in the GMS or GMS FM will do any harm to yellow metals. Without exception in my experience, that damage only occurs wehen GL-5 gear lubes are used that contain active sulfur EP compounds. There are none in ANY of the popular fluids: GMS, GMSFM, Red Line MT series, or Honda's MTF. Repeat: N-O-N-E.
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From: Day Trader
We have had excellent results so far using the GMSFM. Early on we were looking for a fluid to replace the HMTF because we were noticing a problem with the notchy shifting. We tried the GMS and found good results but they were only short term as the fluid broke down rather quickly. We just recently put GMSFM in a 92 NSX that was having 3rd gear problems and they seem to be corrected and also just put the fluid in a 92 Accord with 165kmi and it shifts as new now. I also agree with RR that there are no properties in GMSFM that will harm yellow metals.
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From: Sunnyvale
Originally Posted by CrazyPhuD,Aug 24 2004, 01:58 AM
..actually no I didn't put the wrong stuff in the car....I went to experiment with the GM Full Synthetic MTF specifically because no one had tried it in our car. The GM Full Synthetic MTF is a GL-4 fluid and is safe for yellow metals. It is branded as Castrol Syntorque. I have to check to see if I have enough left, but if I do I'll send it off for a VOA analysis.So far my results are very positive. 1-2 will still notch some when it's cold but once it warms up fully it shifts smooth as silk, obviously feels better than the MTF I replaced but will compare it with GM synchomesh when I get a chance. As for longevity, Ive now got over 1000 miles on it(thanks to a trip to LA) and it's still shifting very smoothly...