If this problem isn't related to the rear brake try looking further forward. I assume your car has a Centa type compensator? There should be a hole about 2" diameter cut in the underside of the compensator housing, have a look inside it with a torch and a small mirror and see if there are any chunks of rubber in there. If the rubber rollers break up the lumps of rubber often jam in the housing and rub against the rotating internal parts, hence the burning rubber smell. When they break up you rarely loose all drive but there is an increase in vibration. If you chose to ignore these signs you will eventually loose all drive but that is very extreme.
If it is the Centa rollers breaking up the good news is that a new set is only about £25, the bad news is that the engine has to come out to replace them. Hopefully your Centa is fine and it's a binding rear brake. Also agree that it is a very good idea to change the brake fluid every other year, don't forget the clutch fluid as well.
Last edited by planenut; 05/10/19 11:01 PM.
