Turbo 400 Kickdown Switch
Thread Starter
Pro
Joined: Jan 2004
Posts: 518
Likes: 0
From: oh
Turbo 400 Kickdown Switch
On my '69, my tranny is not down shifting when I jump on it. I understand there is an electronic kickdown switch. Where is it located? any pics floating around out there? is it adjustable?
Thanks!
Jeff
Thanks!
Jeff
Thread Starter
Pro
Joined: Jan 2004
Posts: 518
Likes: 0
From: oh
Thread Starter
Pro
Joined: Jan 2004
Posts: 518
Likes: 0
From: oh
I checked my aim manual for location and wiring...I don't have a switch mounted on the gas pedal. Bubba didn't think I needed one. Is the switch and bracket readily available? I'm going to make sure I have the wires still in place.
Jeff
Jeff
Burning Brakes
Joined: May 2004
Posts: 1,100
Likes: 3
From: belle plaine ks
I've been told that chevelles use the same gas pedal switch arrangement. I believe the harness is still available from one of the catalogs or you can use a b and m or lokar electric switch mounted up by the carb. If somebody messed with your car before you got it [changed it from a manual to an automatic] it might not be there.
Burning Brakes
Joined: May 2004
Posts: 1,100
Likes: 3
From: belle plaine ks
Thread Starter
Pro
Joined: Jan 2004
Posts: 518
Likes: 0
From: oh
The harness is still intact under the dash, I will need the switch & bracket.
I adjusted the modulator valve (1 turn cw) and what a difference. The shifts are snappier when you are getting into the throttle. I will be adding a shift kit to improve the shifts when I am not shifting manually.
I am heading to a swap meet this weekend so I will keep my eyes open for the kick down switch. Does any one have a pic showing what the bracket looks like?
Jeff
I adjusted the modulator valve (1 turn cw) and what a difference. The shifts are snappier when you are getting into the throttle. I will be adding a shift kit to improve the shifts when I am not shifting manually.
I am heading to a swap meet this weekend so I will keep my eyes open for the kick down switch. Does any one have a pic showing what the bracket looks like?
Jeff
Burning Brakes
Joined: Jun 2002
Posts: 837
Likes: 3
From: Texas
The actual switch looks like this. http://www.ss396.com/mm5/merchant.mv...=TRANSMISSIONS
The mount for it is not removable, but built into the dash framework as I recall.......not 100% sure.
You can still get these kickdown switches from the GM parts house.
The mount for it is not removable, but built into the dash framework as I recall.......not 100% sure.
You can still get these kickdown switches from the GM parts house.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Instructor
Joined: Jun 2005
Posts: 140
Likes: 0
From: Bovingdon Hertfordshire
See link:
http://forums.corvetteforum.com/show....php?t=1737591
Same kind of questions.
Although mine is now wiring and firing the dentent solenoid in the box it still doesn't kick-down
I'm thinking of dropping the pan and valve tray and giving it a clean out.
Questions:
1. Is this easy to do on the car (ie. do the steel ***** go everywhere) ?
2. While I'm at it is there any point in putting in a B&M shift kit ?
Anyone using the B&M - pros and cons ?
Jeremy.
http://forums.corvetteforum.com/show....php?t=1737591
Same kind of questions.
Although mine is now wiring and firing the dentent solenoid in the box it still doesn't kick-down
I'm thinking of dropping the pan and valve tray and giving it a clean out.
Questions:
1. Is this easy to do on the car (ie. do the steel ***** go everywhere) ?
2. While I'm at it is there any point in putting in a B&M shift kit ?
Anyone using the B&M - pros and cons ?
Jeremy.
Melting Slicks
Joined: Oct 2005
Posts: 2,056
Likes: 8
From: Redruth Cornwall
Burning Brakes
Joined: May 2004
Posts: 1,100
Likes: 3
From: belle plaine ks
See link:
http://forums.corvetteforum.com/show....php?t=1737591
Same kind of questions.
Although mine is now wiring and firing the dentent solenoid in the box it still doesn't kick-down
I'm thinking of dropping the pan and valve tray and giving it a clean out.
Questions:
1. Is this easy to do on the car (ie. do the steel ***** go everywhere) ?
2. While I'm at it is there any point in putting in a B&M shift kit ?
Anyone using the B&M - pros and cons ?
Jeremy.
http://forums.corvetteforum.com/show....php?t=1737591
Same kind of questions.
Although mine is now wiring and firing the dentent solenoid in the box it still doesn't kick-down
I'm thinking of dropping the pan and valve tray and giving it a clean out.
Questions:
1. Is this easy to do on the car (ie. do the steel ***** go everywhere) ?
2. While I'm at it is there any point in putting in a B&M shift kit ?
Anyone using the B&M - pros and cons ?
Jeremy.
Instructor
Joined: Jun 2005
Posts: 140
Likes: 0
From: Bovingdon Hertfordshire
An aftermarket bulb - such as the Art Carr one has an adjustment whereby you can change the shift point by a few miles an hour.
(Allen screw in the vacuum pipe - pull the vacuum, turn the screw, re-fit the hose).
Hope that helps Jotts........
Jeremy.
"The vacuum modulator regulates shift points according to engine vacuum to make the transmission upshift at lower rpm during part-throttle driving. On the left is a typical stock GM modulator. The modulator on the right is a typical adjustable modulator, and the middle modulator has a larger diaphragm that Auto-Rite says works well with engines that produce lower vacuum. Art Carr and B&M offer adjustable modulators for the TH350 that allow you to adjust the shift points within a 2- to 4-mph range."
Last edited by langlj00; Jul 5, 2007 at 12:51 PM.
Thread Starter
Pro
Joined: Jan 2004
Posts: 518
Likes: 0
From: oh
in addition to regulating the shift points it went from a soft mushy feeling transmission to a crisp shifting operation. It is not quite as snappy as a shift kit but it definitely helped. If you take off the vacuum line on the modulator and look in the hole you will see an adjustment screw. (probably not on the standard modulators)
Jeff
Jeff
