Will a car fail MoT (or the station refuse to test) if it won't go into one or more of the gears?
Although at the moment my Felicia is going into all the gears OK, if it starts arsing about again and I decide I do need to change the transmission, then it might make sense to MoT test it first. The current certificate runs out in January and I'd feel pretty stupid spending the time and money to change the transmission, only to find it was economically unviable to get through MoT in a couple of months time. (Shouldn't be but you never know.)