TH400 Kickdown
Thread Starter
Instructor
Joined: Jul 2004
Posts: 189
Likes: 0
From: Orlando Florida
TH400 Kickdown
Greetings all,
when i try to mash the pedal, i can't get the tranny to kick down at all. i know the switch was working, i could manually trip it and hear the air flap work on my old hood.
question; is there some way to adjust the switch? or do i just put a piece of rubber hose on the rod?
thanks
Robin
when i try to mash the pedal, i can't get the tranny to kick down at all. i know the switch was working, i could manually trip it and hear the air flap work on my old hood.
question; is there some way to adjust the switch? or do i just put a piece of rubber hose on the rod?
thanks
Robin
Melting Slicks
Joined: Dec 2000
Posts: 2,198
Likes: 2
From: Eastern Connecticut
The switch is very easy to adjust. Climb under there and push the plunger all the way up (it'll have some resistance but will go). Then mash the pedal again. If it's an old worn out switch, it won't stay adjusted for long, unfortunately. Joe
Last edited by joe73vette; Oct 22, 2004 at 09:24 PM.
Safety Car
Joined: Aug 2001
Posts: 3,686
Likes: 202
From: Waterford Mi
Are you sure it is not making the switch? Check to see if you get 12 volts to the wire on the trans. If you do then the detent solenoid is bad. Not hard to replace but messy. You just need to drop the pan and it is right there.
Le Mans Master
Joined: Sep 2000
Posts: 5,635
Likes: 4
From: Orlando Floriduh
The trans has a solenoid in it (in the trans oil pan) that is activated by the same switch that opens the hood door. So... you need to make sure the trans solenoid is plugged in and listen for the click. The vacuum modulator also controls low speed kickdown from 3-2 but will never get 2-1,3-1.... or 3-2 at speeds above 45 mph. The kickdowns just mentioned are controlled by the solenoid. I really don't know if a bad modulator would cause your problem but it is certainly possible to have a bad modulator and an inoperative kickdown solenoid
