I just swapped a dohc zc in my 91 hf crx. Everything went well except 2nd gear grinds really bad. Im pretty sure its an si tranny. I got the motor, the tranny, the axles and the hubs for 300 bucks. I told the guy, "hey man i got another si tranny if this one is shot, so if it needs to be changed just let me know so I dont waste my time" Anyway, he said it was good when he drove it and its fixable. Well I adjusted the clutch as much as possible and still bad grinds in 2nd gear. So whats up? Is this tranny done for or what? All the other gears are smooth as hell so its a pain that 2nd gear's gonna ruin it for me. Not much experience with tranny problems so any help will be greatly appreciated. Like I said I got another si tranny, so if a tranny swap is the answer someone let me know.