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th400; help
Topic Started: Apr 29 2010, 09:55 PM (274 Views)
Deleted User
Deleted User

Hey all haven't brleen here in a while. Well I busted my tranny and now I got my self a th400. And I hear talk that I need a kick down switch any one have experience with this
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Ashley
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NYTHIRDGEN's First Lady
hmm, not sure

btw is it new, rebuilt or just new to you

1988 IROC-Z 350 5.7 liter TPI L98, 700r4, 3:43 posi disc, MSD 6al Ignition, CompCam 260 with 1.6RRs, Edelbrock shorty headers, Flowmaster 40 series 3" duals & Custom Y-Pipe, TCI 2800 RPM Torque converter, AutoMeter gauges, 15in Weld Racing wheels

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gp90gta
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The Professor
A TH400 is a vacuum operated kick down, what that means is that it does not use a tv (throtle valve) cable or what most people call a kickdown cable so to answer your question no you do not need a switch just a vacuum hose from the intake to the trans
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1990 GTA, 350, AFR195's, TPIS Miniram, Dyno Don headers, Custom bumpstick by Bullet cams, 36lbs injectors, Spohn SFC's, Custom tune by me.
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charged355
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Nythirdgen Founder
You need a differ crossmember and a torque arm mount kit for a th400 and might need a differ lenght driveshaft pending on what tail is on that tranny, and put a manual valvebody in it so no need for anything but a shifter
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Deleted User
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It was rebuilt in Connecticut and it is new to me the tranny has a vacuum line and a single cable coming out of it and the guy at the tranny shop told me about a actual switch that mounts to ur intake manifold and is connected to the carb linkage to control shifting. Soo I'm confused? And I got Tue new cross member and the drive shaft is the same just new yokes

O. And its going in with a brand new 400ci 6.6 liter motor
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84 z28
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There is an electronic kickdown switch in the th400. Its usally mounted on the throttle pedal. Everything else is done by vavccum. A th350 would of had a cable going from the trans to the carb throttle linkage.
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Deleted User
Deleted User

ok so i ordered the cross member here
http://www.hawksthirdgenparts.com/camarofirebirdspohn82-92turbo350transmissioncrossmember-1-1-1.aspx

and when i was at the shop the dude said that if i have that cable, witch looks like a regular wire i need the kick down, so i dont know what to do, what would that wire connect to when i put in the tranny,

and were on the intake manifold do i put the vacuum, i have the edlebrock performer intake, how about the carb, can i put it there?

and if there is any one in the queens area that knows i live in middle village, call me at 9175844883 if you wanna see for your self.
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