the d with the circle around it is the right gear the other is alower gear used for towing
Sounds to me like a spring has gone which returns the gear selector to the mid position.sorry mate but if that is the case then it's a gearbox strip.
trans has to come out. sounds like a broken output shaft between the 3rd and 4th gear synchro. 4th gear is the very last gear on the output shaft before it goes out to the driveshaft. 3rd gear is right in front of it. can't be the countershaft becaus...