i have buy a rebuild transmission and i would like to know if is si transmission. the mark is pl3/1000.

 

Pretty sure it's pl3/3000... I'm not at home right now or else I'd be able to tell you for sure. Actually, look for a post by thumpu77, he has a link to his tranny rebuild.

 

You have a 89-91 DX tranny (or possibly an HF) as said above, the 89-91 Si trans is pl3/3000 and 88's just say pl3 for both Si and DX/HF

However, since it's been rebuilt, there is the possibility that someone swapped out the final drive for an Si final... only way to tell for sure is to put it in a gear and count how many times the input shaft rotates to each rotation of the axles, then calculate the gear ratio from there.

 

i dont know but the dx transmission is pl3/A000

 

i have a 88 crx si tranny no grinds i'll sell you for $120 plus shipping i also have NEW axles i'll trown in for $30 more