Not changing pass third gear had transmission rebuilt twice in past year, fluid is fine Rpms race to five

If you have third but not fourth and the car will go in revese, and pull foward in Third, Second, and First, we know the pump is good, the reverse clutches are good, the foward clutch is good, but take a look at the difference is first gears for OD, and Third. Third, Second, and First, the overrun clutch is applied. The purpose of the overrun clutch in essence is to lock the sprag together, so that there is engine braking. Because of this, we can deduce that in OD, the foward sprag was not holding like it was supposed to, but by putting it into Third, the overrun clutch applies, thus overriding the sprag allowing the car to move foward. The sprag is faulty and needs replaced. If you have third but not fourth and the car will go in revese, and pull foward in Third, Second, and First, we know the pump is good, the reverse clutches are good, the foward clutch is good, but take a look at the difference is first gears for OD, and Third. Third, Second, and First, the overrun clutch is applied. The purpose of the overrun clutch in essence is to lock the sprag together, so that there is engine braking. Because of this, we can deduce that in OD, the foward sprag was not holding like it was supposed to, but by putting it into Third, the overrun clutch applies, thus overriding the sprag allowing the car to move foward. The sprag is faulty and needs replaced.

The servo's on the right side of the transmission under the round cap has a second gear servo and a fourth gear servo that operates the band for 3rd and 4th that can be replaced without removing the transmission from the automobile this could be the problem and the easiest and cheapest to fix. The servo's on the right side of the transmission under the round cap has a second gear servo and a fourth gear servo that operates the band for 3rd and 4th that can be replaced without removing the transmission from the automobile this could be the problem and the easiest and cheapest to fix.