d16 trans swap

i have 94 del sol si thati bought a few months back as my daily driver. got it at decent price cuz clutch was on its way out. it made an annoying grinding like sound before i took car to shop. i take it in to have clutch replaced and it still makes this annoying grinding sound now when i drive it. it doesnt do it all the time but does it when car is in gear and driving, as soon as push in clutch it goes away, let clutch out and sound is back. driving at normal speed car doesnt make a sound but when i let off the gas with car in gear sound is there. is it a shitty clutch or did he fuck up shaving flywheel or what? someone help cause now i wanna sell car and invest more time and money back into CRX. if i cant figure out problem i wanted to know if it was cool to swap the tranny off a D16z6 and replace it with trans off 89 A6? A6 only had 150 miles on its clutch before i swapped motor on my rex. hopefully i can pinpoint exact problem with current trans but if not can i do a quick swap and what problems if any can i expect?

i know i should have done the work myself origanally but when i got car it was freezing out and i had more money then i had time so i said fuck it and took it to local shop. never trust your car with anyone else no matter who recommended them!!