TH400? Kickdown? 67-442
March 31st, 2009 | 07:14 AM
#1
Thread Starter
Registered User
Joined: Mar 2009
Posts: 215
From: Virginia Beach, VA
TH400? Kickdown? 67-442
Anyone out there that can give me a quick lesson on kickdown hookup for a 400? I've seen an online article from Hi Performance Pontiac on how to wire a B&M switch. Is that all i need to try to follow?
Last edited by Flye; March 31st, 2009 at 10:00 AM. Reason: additional info
March 31st, 2009 | 08:43 AM
#2
Old(s) Fart
Joined: Mar 2007
Posts: 48,407
From: Northern VA
Two questions:
67 442 (real car): Automatic, would it have come with a 400? or 350? (or did they come with either) I believe the seller thought it was a 400. It has an electrical/wire running into driver side if that is a clue.
Kickdown: It looks like 350/400 have different kickdown mechanisms. There is nothing at carb that I see, mechanical or electric, but I've been chasing other issues so far, so I haven't spent a great deal of time looking.
would it have been on carb or at accelerator somehow?
Anyone out there that can give me a quick lesson on kickdown hookup for a 400? I've seen an online article from Hi Performance Pontiac on how to wire a B&M switch. Is that all i need to try to follow?
67 442 (real car): Automatic, would it have come with a 400? or 350? (or did they come with either) I believe the seller thought it was a 400. It has an electrical/wire running into driver side if that is a clue.
Kickdown: It looks like 350/400 have different kickdown mechanisms. There is nothing at carb that I see, mechanical or electric, but I've been chasing other issues so far, so I haven't spent a great deal of time looking.
would it have been on carb or at accelerator somehow?
Anyone out there that can give me a quick lesson on kickdown hookup for a 400? I've seen an online article from Hi Performance Pontiac on how to wire a B&M switch. Is that all i need to try to follow?
The kickdown circuit is pretty simple. Fused +12v is applied to one side of the switch. At WOT the switch closes, sending +12V to the trans. This activates the solenoid valve inside the trans, which switches hydraulic pressure to cause a downshift.
March 31st, 2009 | 10:03 AM
#3
Thread Starter
Registered User
Joined: Mar 2009
Posts: 215
From: Virginia Beach, VA
Thanks.
I came home at lunch and followed the wire from trans. It goes to exactly what you described. In this case it is a round 'pod' looking thing that connects to the throttle linkage.
All wires are there and connected.
The kickdown isn't working, so something isn't working right.
I came home at lunch and followed the wire from trans. It goes to exactly what you described. In this case it is a round 'pod' looking thing that connects to the throttle linkage.
All wires are there and connected.
The kickdown isn't working, so something isn't working right.
March 31st, 2009 | 10:37 AM
#4
Old(s) Fart
Joined: Mar 2007
Posts: 48,407
From: Northern VA
Thanks.
I came home at lunch and followed the wire from trans. It goes to exactly what you described. In this case it is a round 'pod' looking thing that connects to the throttle linkage.
All wires are there and connected.
The kickdown isn't working, so something isn't working right.
I came home at lunch and followed the wire from trans. It goes to exactly what you described. In this case it is a round 'pod' looking thing that connects to the throttle linkage.
All wires are there and connected.
The kickdown isn't working, so something isn't working right.
March 31st, 2009 | 02:36 PM
#5
Thread Starter
Registered User
Joined: Mar 2009
Posts: 215
From: Virginia Beach, VA
Can you still buy the original style switch?
If it comes out that the switch is no longer good, can you still buy a switch that fits?
Thanks for your help on the troubleshooting!!
d
Thanks for your help on the troubleshooting!!
d
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