http://www.acuraoemparts.com/d...ch=no
Obd1 got 2 plates and small pulley, Obd2 got 1 plate and pulley with gears(#14,15,16) What if you used vise versa say if you had a obd1 and put the obd2 pulley with 1 plate, is there any difference? Also is there just 2 tiny keys holding that assembly in place?

 

It won't matter if you use the OBD2 gear with the OBD1 stuff. And there's one tiny key that lines everything up, #19.

 

Strange on the OBD2 it has 2 keys while the OBD1 has 1 key, what gives? The keys I have seem a wee bit small

 

If you're using the OBD2 gear, I would use the OBD2 key.

 

Yeah but the part number for the key for obd1 and obd2 is the same, says obd1 needs 2 keys and obd2 needs 1 key. I see no reason obd2 needs only 1 key, I dont understand