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Author Topic: th400  (Read 2735 times)

Offline jnmac

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th400
« on: March 31, 2007, 06:43:00 pm »
hi guys im new but ive been looking around for weeks now.i have a 79 3/4 ton scottsdale and im swaping bodys on to a 83 scottsdale. now the truck has a th400 in it but the new body was set up for a 700r4.now im not sure if some of u guys know in 79 the made a th400 that was down shifted elecrtonicly(spelling) which mine has now to my question when i swap these cabs how do i ge my 400 to down shift again(passing gear)is there a kit out maybe somone know a home fix any and all help would be great. and just to let u know .no my th400 dosent have a kickdown cable nore does it have a spot where one would go. thanks for the help

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Offline VileZambonie

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EZ Board Sucks
« Reply #1 on: March 31, 2007, 10:54:00 pm »
Yes the TH-400 uses a detent solenoid as opposed to a cable. A switch located on the gas pedal energizes the solenoid when you depress more than 50% throttle or as u set it. it just jumps 12 v to the solenoid. the solenoid is case grounded.

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Offline jnmac

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Re: th400
« Reply #2 on: April 01, 2007, 08:32:00 pm »
ok so i just need to mount the switch to the 83 then to a 12 volt sorce right

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Offline VileZambonie

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Re: th400
« Reply #3 on: April 01, 2007, 09:49:00 pm »
pretty much just make sure you use circuit protection and run the wires carefully.  

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,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10
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