My bro has a 1986 MZ20 soarer, 7m-gte auto. Has an issue atm, auto box wont change out of first every now and again. im thinking loose connection somewhere or faulty sensor. Everything in the car is electric, could it be the speed sensor on the gearbox? He has had the thing at an auto trans place in Holden Hill, he seems to think its either the TPS or speed sensor.