A few years back I acquired a 72 440/727 Plymouth Duster. The seller indicated the car had a manual valve body which I dont believe it actually does since the kickdown lever is still mounted on the trans. I have not drove the car much, maybe 2-300 miles but I have noticed the trans slipping between shifts the more I drive it. I have read somewhere if the trans kickdown in not functioning correctly or connected to the trans it will in fact damage the transmission. If this is accurate, what is being damaged and what is the remedy?
Another question, I was also informed the car has a High stall converter, maybe 2800 stall... The trans clearly slips at lower speeds if driving from a stop under light acceleration. If the pedal hits the floor, the tires blow smoke... I was under the impression that a good converter will not slip under light loads. Is that assumption correct?
Thanks
First off: DO NOT DRIVE THE CAR WITHOUT KNOWING WHAT IS GOING ON WITH THE LINE PRESSURE. It can damage the tranny.
What I mean by that is the kick down lever controls the pressure that is applied to the clutches and bands unless it has a manual valve body. If the valve body is not full manual, then the line pressure is at idle pressure all the time with the kick down lever not being tied to the throttle. A manual valve body puts the line pressure above even the normal wide open amount of pressure all the time.
If it shifts on it's own at all, then it is not a manual valve body. There is a lot more to this, but that is enough until we get more information.
