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06-30-2019, 05:39 PM
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#1 |
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Junior Member
 Join Date: Nov 2018
Location: Kirkwood, PA
Posts: 98
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Th400 shift problem
Th400 won't shift out of first gear. It will go out of first, but doesn't deem to be in a gear , then when you slow down, it goes back in first. Did all the suggested fixes, modulator, checked valve body, cha ged fluid, added trans-x, still same thing. First, reverse, neutral, and park. Today I took the valve body off, and while inspecting it, I pushed down on the servo piston with my hand and fluid squirted from the kickdown sensor. I guess that's what it is. It looks like a gauge sensor. It screws into the valve body by the servo piston. I can't find one listed by the parts people. Can I just plug it and let my kickdown be done manually? Thanks for any knowledgeable answers.......Warren
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07-02-2019, 03:42 PM
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#2 |
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Registered User
Join Date: Sep 2018
Location: San Diego, CA
Posts: 4
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Re: Th400 shift problem
It almost sounds like the kickdown switch is energized, which makes it hold first gear for a long time...This happened to me when I changed carburetors and did not hook up the kickdown correctly...Has anything changed with the kickdown or the wiring?
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1968 GMC C2500, 327/T400, Dana 60 w/ 4.11's, original working AC, disc brakes |
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07-02-2019, 03:48 PM
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#3 |
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Junior Member
Join Date: Nov 2018
Location: Kirkwood, PA
Posts: 98
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Re: Th400 shift problem
Not hooked up
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