Re: Ultramatic

Posted by Ross On 2019/6/22 6:02:15

Back to original question: I'm pretty sure what you mean by 3d gear is convertor lockup.

There is low which is gears plus convertor
There is high which is just convertor
There is direct, which is convertor locked up like a modern car.

Anyway, if you are not getting convertor lockup there are a whole raft of possible reasons. In my experience, the least likely is that the governor is stuck or one of the valves in the valve body is stuck. Far more likely is that a number of bushings in the trans have worn to the point that the fluid necessary to activate the direct clutch simply doesn't make it there anymore. Often in that case when the unit is dead cold the clutch might operate softly but then goes away when the fluid heats up.

Best bet would be to install a pressure gauge on the direct drive port on the bottom of the bell housing and see if the pressure ever tries to rise as the car accelerates.

As to the throttle linkage adjustment: for a first whack make sure the carb is off the fast idle cam and is idling slowly. Turn it off, get under and loosen the clamp screw on the throttle link on the trans. With a right angle screwdriver turn the throttle shaft ccw til it stops, then bring it cw just a hair so it is not resting on its stop. Tighten the clamp and try it.