explorer said:
If this is on an AW4 trans. the throttle valve cable has no effect on shift point. It only affects the line pressure. So tightening the cable will firm up the shift, and loosening it will soften the shift. To adjust it per the manual, press the button that allows adjustment, and push the cable in against the spring, then let it return slowly, where it ends up is the proper adjustment. It should end up with the no tension on the cable, and no free play either.
We are gonna have to think up a new way of explaining this, maybe in and out, on the adjuster plunger is better. Than tight and loose. When the plunger moves towords the TB, the cable shell moves with the plunger, which lossens the cable at/to the TB. Something else I noticed, was that if the plunger is out too far, the extra TV cable will hit the throttle lever and the motor wouldn´t idle below 1500 RPM or so, could be dangerous.
I just went out and pushed the plunger all the way in, shifts were soft and I could feel the clutches slipping, pulled the plunger out untill about an 1/8" of cable was sticking out of the clip on the TB and it shifted with a thunk into 2nd.
AW4 per 88 FSM (think it was translated by a Japenese translator)
With ignition off, retract cable self-adjusting mechanism fully. Press cable button down and push cable plunger inword.
Rotate throttle lever to wide open throttle position. While holding throttle lever in position, allow plunger to extend. When the plunger is fully extended release throttle lever.
AW4 per 93 FSM
With ignition off, fully retract the cable plunger. Press cable button down and push cable plunger inword. Rotate throttle lever to wide open position. Cable will ratchet to correct position. Release throttle lever. Cable is adjusted. It´s a GM TV cable, the adjustment procedure has been the same since the mid 80`s.
I don´t know the AW4 as well as some other trannies, but a function of the TV cable (in most tranies) is to bleed off some pressure, so the shifts don´t bang at higher RPM´s. As well as to downshift at WOT.