well i got a 90 crx with a si head and hf block and a si tranny....when i shift to 2nd at high rpms in 1st they will just go back down like its not catching or somthing....i tried 3 diffrent trannys....same thing......wut do you think?

 

cmon guys what do you think

 

My first thoughs are the shift linkage, or the motor mounts.

 

check ur linkage. i have a ys1 on my b18 and it seemed like something was worng wiht the tranny (id be putting it into 3rd rather than first even tho it felt like 1st). the culprit would be your bitch pin.