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12-06-2008, 01:49 AM
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#1 |
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Pat
Join Date: Jan 2008
Location: canada, bc
Posts: 243
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Kick Down Problems
First off the trans is a turbo 400 and i know its an electric kick down.
I have no idea where to start troubleshooting with it?? any suggestions would be great? Thanks |
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12-06-2008, 05:50 AM
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#2 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Re: Kick Down Problems
The kickdown in the TH 400 should be easy to checkout . I assume that the transmission is in the truck pictured in your avitar so the kickdown switch will be mounted on the carb. Before starting to check out the electrical, make sure the kickdown switch is depressed with the throttle wide open, (engine off).
The switch will have two wires in it, one is power with the ignition switch on so check for power to the kickdown switch first. If you have power to the kickdown switch check the other terminal with the kickdown switch depressed, ignition switch on and the engine not running. If you have power going through the switch make sure that the wire going down to the detent switch on the transmission is good and that power is going to the detent switch with the kickdown switch depressed, (engine off, ignition on). If power is reaching the detent switch on the transmission, then the detent switch must be bad and needs to be replaced. If there is no power from the ignition switch then the wiring will have to be checked. The power wire to the kickdown switch is plugged into the "Ignition Unfused" terminal of the fuse panel so start there. Jim
__________________
1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC |
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12-06-2008, 07:16 PM
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#3 |
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Pat
Join Date: Jan 2008
Location: canada, bc
Posts: 243
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Re: Kick Down Problems
awesome ill try that
is the detent switch on the transmission easily replaced, or do i have to drop the pan and go from their? thanks again |
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12-06-2008, 07:37 PM
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#4 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Re: Kick Down Problems
The detent switch is easy to change as it screws in like a temperature sending unit.
Jim
__________________
1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC |
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