Man, I've got that same going into 3rd grind as you guys. Mine is with me stock 94 EX tranny though.
I'm starting to do it less but it still happens.

 

I have a 90 ls tranny in my rex with bad syncros in 2nd and 3rd gear. 3rd's realy bad, I have to slam it in to gear at high revs. Where can syncros be purchased other then Acura?

 

If you shift properly (ie. at the proper rmp) it should slide into gear with no grinding at all. (You don't even have to use the clutch)

 

That only works with a tranny that has good syncros. With trannies that dont, its gonna grind and grind till there is no more to grind. Yes this does work, i do it all the time from 3rd to 4th, and 4th to 5th in my truck, and also when im down shifting you have to "match" rpms, or basicly blip the throttle. I have a friend thats selling his ITR tranny for sale with an upgraded clutch that has about 20k on the tranny for $1580 w/shipping.

 

Well id think about it, but i dont think that ITR trannys are good for boost. Enless someone else would like to prove me wrong? I plan on going turbo in about a year. So i think ill just repair the GSR one i have.

 

try adjusting your clutch - high rpm grinding is usually not caused by bad synchros but will sure make them bad - if clutch is not adjusted right, you won't have enough air gap when the clutch is disengaged and due to cetrifugal force the disc will remain in contact with the flywheel - like trying to shift without the clutch - if synchros are bad it will usually jump out of gear.

 

So you want me to try shifting at high RPMs without the clutch and see if 3rd gear will take it? to find out if its the syncros or not?

 

no - just try adjusting the clutch

 

gotcha, will do.

 

Would a misadjusted clutch only affect one gear though? I never grind any other gear except 3rd at high RPM.