I have a 1991 Gt... i have only had this car for two months. When i bought it it had all 4 gears and overdrive, then one day i only had 1st and 3rd no overdrive, then i had it looked at. Told me it was a valve body that went bad in the trans. ok drove it home anmd realized i only had 1st gear ( i only live two blocks from the trans shop), I then had it looked at again by some one else and he got it to have 1st and 2nd by taking the whole trans out. then proceeded toi tell me that i have a wiring issue??? i changed what every computer is by the fuse box and to no avail nothing changed. It has 70k and a 1.8 motor auto trans. any help?????