Yesterday was able to drive car ok during day. In evening needed to pop out to pick up kid and was unable to get the car in reverse - and the gear lever was not firm - it felt like I was stirring a pot of soup... not a nice feeling. I rolled car out of driveway, but couldn't engage 1st properly either to pull off.. managed to get back into drive, but unpleasant odour in cab and around car. Is this a linkage problem or a seal? not really sure where to start.