Hi TinyPower. What other issues or anomalies are you getting out of the gearbox? Does the shift lever feel sloppy, gear crunch etc? It would be unlikely the gearbox has nearly every gear blown in it (note I did say unlikely - I've worked on a Mitsu 5 speed that had lunched 5th gear...) Shifter could be worn out or has all the mounting bolts loose/stripped. The nylon cap that resides on the end of the shift lever is renowned for splitting after years of doing it's funky thing. I have heard of gearbox woes with high mileage 4x4 gearboxes.