As usual - i can spend hours looking at all the useful info on this site - and have.

I am curious to the front and rear spring codes mean. Not sure i understand what the differences are. do the codes relate to different part numbers ? If they do - i bet if you ordered springs for an 86 gt - there would be one part #... ?? or does this have nothing to do with actual part numbers ?

on my 86 GT, my spring codes (beside the TRAN Code on the door tag) are OOBB (front/rear).

I have pulled up other door tags listed here that are pretty much the same cars (85/86) and some springs are different. I have seen TT,SS, etc.

any reason why a lot of these codes are different from what appears to me to be mostly / same configuration ?

thanks,
jason