lowblazin

well i think my synchro is going out. my 3rd gear scratches when shifting into it but only above 3000 rpms. i dont have a tach so i dont know the exact rpm but prolly anything higher than 3-4k scratches. someone told me that some new transmission oil could help this. anyone have any suggestions. should i change the tranny oil, if so what kind, or do i have to get a new tranny

Ricey McRicerton

GM synchromesh. If that doestn work its time for a new tranny guy.

upgraded

just replaced the tranny in my 92 si with the same 3rd gear woes. Has 183k miles on it so not a bad run i guess.

lowblazin

ok, so i searched for the synchromesh and it seems that the friction modified is the way to go. but also i saw that penzoil makes one. which do you think would be better

The Internet Tough Guy

according to mista bone - the best guy with credible tranny info around here - your synchro is fine. your engine is shaking around at the higher rpms, and the shift linkage doesn't get it into gear properly, because the tranny isn't where it should be. try replacing your motor and transmission mounts, or get polyurethane inserts all around.

Ricey McRicerton

Id go with the GM synchromesh, but try the Penzoil. It's like 6 bucks a quart, and it takes 2...so its 12 bucks if it does'nt fix it.

lowblazin

k. well i read a little more and i saw more people saying the regular was better. ill be going to a gm dealer tomorrow. thanks for the help

Average Al

GM syncromesh
i swear by it

but in the long run ppl say it wears seals and syncro faster but i NEAVER seen that really occur ppl used it for long time and have no problems