My auto box is definitely shot , the car will only inch forward and reverse works fine , giving fault codes to say the gear ratios are incorrect . Would recommend you get the fault codes read , there are other possibilities apart from the main gearbox clutches welding or failing , gear selection actuating solenoids can give problems as can the hydraulic valve itself and cost a bit less to fix , more unlikely the transmission control module or sensors . Do a google on AW55-50SN and you will get links to some of the American forums where this box would be fitted to almost every P2 volvo , they do seem to give a lot trouble but there is a lot of info available free . Pink dosnt sound like the right colour to me , I think it should be cherry red but again I am not an expert . If you are going to change the oil go to a GM dealer for the oil as they charge one third the price of Volvo and its the same JWS3309 . It maybe also the case that the TCM just needs a software upgrade , the software learns driving modes and selects best gearchange points so you need to rule this out first before spending a lot on the other things but dont let the fault develop .