move the TH400 kickdown switch. car LEAPS!
Thread Starter
Race Director
Joined: Oct 2000
Posts: 15,055
Likes: 79
From: central FL, near the beach.
move the TH400 kickdown switch. car LEAPS!
years ago i moved it to 1/2 throttle.
Just think about passing and it anticipates.
Best 99¢ improvement imo. (new lever switch)
Just think about passing and it anticipates.
Best 99¢ improvement imo. (new lever switch)
Burning Brakes
Joined: Nov 2001
Posts: 1,191
Likes: 1
Burning Brakes
Joined: Oct 2004
Posts: 904
Likes: 0
From: Murphy NC
Small adjustments on the kickdown make a HUGE difference. I had an old truck with a 700-r4 that shifted at 3500rpm regradless of throttle position. I was manual shifting it to try to get it to go anywhere quick Fixed the linkage and it was like I had a hot rod! Well I drove like it was anyway.....
Thread Starter
Race Director
Joined: Oct 2000
Posts: 15,055
Likes: 79
From: central FL, near the beach.
stock, the accelerator pump shot floods it, then it downshifts.
moved to halfway, half the shot hits after the downshift(leaps)
.
lever switch pics at radioshack.com
moved to halfway, half the shot hits after the downshift(leaps)
.
lever switch pics at radioshack.com
Instructor
Joined: Jun 2005
Posts: 140
Likes: 0
From: Bovingdon Hertfordshire
Hi all,
I'm driving a '74 (350) with TH400. I've always felt that the kickdown isn't working properly, I assume its electrical ?
Is there a way to test it?
It doesn't kick down if I'm going over 45 mph.
Thanks for any clearer explaination.....
Jeremy.
Thread Starter
Race Director
Joined: Oct 2000
Posts: 15,055
Likes: 79
From: central FL, near the beach.
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Pro
Joined: Jun 2001
Posts: 528
Likes: 147
From: Palmyra NY
Sorry for my ignorance, but where is this switch you are talking about. My 75 (350 TH400) shifts poorly. I have tried an adjustable regulator with little success. I would like to try this mod, but need some clarification. Any pics?
Thanks
Thanks
Thread Starter
Race Director
Joined: Oct 2000
Posts: 15,055
Likes: 79
From: central FL, near the beach.
perhaps a button on the shifter?
or a lever at the carb.
TIP: to find the switch, trace the wire coming out of the th400 pan area. Thats when i found mine, cut off & taped.
Last edited by Matt Gruber; Mar 14, 2008 at 11:32 AM.
Drifting
Joined: Feb 2005
Posts: 1,438
Likes: 2
From: Melrose Florida
Steve
Racer
Joined: Jan 2006
Posts: 261
Likes: 1
From: hidden valley lake Ca
Here are two different kick down kits if yours is missing
http://www.bmracing.com/media/catalog/5.pdf
http://www.lokar.com/interior_pages/...0kd_coiled.jpg
http://www.lokar.com/product-descrip...ect-kd-kit.htm
http://www.bmracing.com/media/catalog/5.pdf
http://www.lokar.com/interior_pages/...0kd_coiled.jpg
http://www.lokar.com/product-descrip...ect-kd-kit.htm
Melting Slicks
Joined: Sep 2000
Posts: 2,406
Likes: 418
From: Chester Virginia
Is this kickdown switch the same as the air door control switch? Talking about a 1973. If not where is it located in relation to the air door switch?
My 73 will not upshift at WOT even up to 5800 rpm. I have to slow the car down to about 35 mph for the car to shift. It also does not downshift when driving around the area at about 45 mph.
Roger
My 73 will not upshift at WOT even up to 5800 rpm. I have to slow the car down to about 35 mph for the car to shift. It also does not downshift when driving around the area at about 45 mph.
Roger
Melting Slicks
Joined: Sep 2000
Posts: 2,406
Likes: 418
From: Chester Virginia
Thanks for the info S489. The service manual and AIM did not show if the switch was the same. The kickdown switch shows on a different wiring schematic than the rest of the wiring. It is a nice day here in Central VA so I'll back out the Vette and take a look.
Roger
Roger
Instructor
Joined: May 2008
Posts: 154
Likes: 3
From: Indiana
Matt, I found this thread while searching the archives. I have a 68 with th400 and I need to put the peddle in the carpet to get it to downshift. The switch is "lever activated" from the peddle but there is no adgustment room left. What did you do to make it work? You mentioned $.99 investment. I would pay twice that much. Please reply.
George
George
