I never posted before, always did good with searching (gotta say thanks to everyone who posted especially B18C5EH2 for the obd2-EG etc threads) My swap went perfect and everything is running good, but when i shift from 1st to 2nd, and sometimes 2nd to 3rd at high rpm (6500+) i hear a rattling kind of sound (like a washer spinning on a bolt) only happens at high rpm, light shifting, idling i hear nothing. anyone know what it might be? i see nothing externally that is loose that could be causing it.

background...94 CX hatchback, 98 US GSR engine. LS tranny (unfortunately) I probably wont be keeping the trans forever, I'm thinking its something wrong in the trans, but i duno.

 

throw out bearing perhaps?

 

I thought about that and i curse myself for not checking it when the tranny was off the engine. Wouldnt that make noise all the time and at every shift? I dont hear the noise in any other gear change but from 1st to 2nd and 2nd to 3rd.