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Topic: Detent Switch Adjustment

in Forum: C3 Driveline Components

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Detent Switch Adjustment (1/23)
11/12/08 3:52pm

bio11
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Oklahoma City, OK - USA

Vette(s):
1972 LS5 Convertible,Auto.Targa Blue with Black Interior.

Joined: 4/1/2007
Posts: 432

I checked my detent switch to see if it's working, it does but not until it is fully depressed. My problem is my throttle does not have enough travel to depress it all the way. I tried one of joel's tricks of putting a piece of hose over it but it still does not get there. There is no adjustment that I can see to move it closer to the throttle. In my manuel it says it adjusts it self automatically. Does anybody have any Idea's?

Thanks

Lonnie

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Detent Switch Adjustment (2/23)
11/12/08 10:42pm

acplus
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, - Canada

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1972, 1980

Joined: 6/23/2008
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The detent switch should have its plunger fully depressed this will pre set the switch, do you have the tabs that you can squeeze to move the cable? or a small hole to put a paper clip in to release?

John

Detent Switch Adjustment (3/23)
11/13/08 12:17am

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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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No cable on this one, John, it's a 400, electric kickdown. The switch is just above the accelerator pedal. Nor does the accel cable have any adjustments...

Lonnie, how far away from the switch pin is the pedal arm? Maybe a larger diameter hose?

I don't know of any adjustments on the switch itself, as it screws directly to the pedal bracket, with no slots for adjustment.
If you floor the pedal from the inside, does it fully open the carb?

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Detent Switch Adjustment (4/23)
11/13/08 10:21am

bio11
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Oklahoma City, OK - USA

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1972 LS5 Convertible,Auto.Targa Blue with Black Interior.

Joined: 4/1/2007
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I have the throttle cable so the carb is fully open when the pedal is floored. The bracket makes contact but it does not depress the switch completly, about 1/2 . When I check the switch with my tester, it makes the circuit after about 3/4 of its travel. I'll try a larger piece of hose or maybe attach a little block or something. Do you think a new switch would be differant. This looks like the original. And what are they talking about when the book says it adjusts automatically.

Thanks

Lonnie

Detent Switch Adjustment (5/23)
11/13/08 10:49am

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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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[QUOTE=bio11] And what are they talking about when the book says it adjusts automatically.[/QUOTE]

Dats a good question...I may have to get one out and see...

btw...the pedal arm should make contact, or should I say full contact, at 3/4 throttle, so that part(the switch itself) is good...we just gotta figure out why the arm isn't pushing on it far enough to accomplish that...Adams' Apple2008-11-13 07:52:03

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Joel Adams
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(click for Texas-sized view!) NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Detent Switch Adjustment (6/23)
11/13/08 1:37pm

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DUNEDIN, FL - USA

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1969 COUPE CORTEZ SILVER, BRIGHT BLUE INTERIOR 383 cu. in. 512 HP. Hooker headers w/ side pipes PS PS AC AM FM STEREO. 68,000.MILES C5 5oth Anniversary Coupe , auto.350hp

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HOPE YOU GET IT WORKING! i DON`T THINK YOU CAN BUY A NEW ONE, AND TRYING TO FIND A USED ONE WILL BE A STROKE OF LUCK. i WENT THROUGH THIS LAST YEAR. FORTUNATELY FOR ME , THE SWITCH WAS OK JUST NOT HOOKED UP RIGHT, IT WASN`T WIRED PROPERLY. GOOD LUCK.

Detent Switch Adjustment (7/23)
11/13/08 1:37pm

rraider1
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Woodland, WA - USA

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1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

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When I bought My 77 there was no kickdown and no wirering(I beleive not the original trans) I bought the switch and installed it. the problem is when I push the gas pedal to the floor the switch goes overcenter and no longer can be acuated. I would like to fix this ,seems to be the right time. here is a picture of the sw installed http://www.C3VR.com/member_pages/4201_4300/4221/Kick-Down-Switch.jpg It may help others

Detent Switch Adjustment (8/23)
11/13/08 2:59pm

bio11
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Oklahoma City, OK - USA

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1972 LS5 Convertible,Auto.Targa Blue with Black Interior.

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I may have some time tonight to play with this. Maybe find out some answers.

thanks

Lonnie

Detent Switch Adjustment (9/23)
11/16/08 7:19pm

rraider1
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Woodland, WA - USA

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1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

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could someone take a picture of the kickdown switch to compare to mine there nseems to be no adjustment and i cant see any other way to mount it

Detent Switch Adjustment (10/23)
11/17/08 11:25am

bio11
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Oklahoma City, OK - USA

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1972 LS5 Convertible,Auto.Targa Blue with Black Interior.

Joined: 4/1/2007
Posts: 432

Yours looks just like my 72. There is no adjustment that I know of. My shop manuel mentions that it is self adjusting. I think Joel was trying to find out something about that.

Lonnie

Detent Switch Adjustment (11/23)
11/17/08 2:56pm

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Duncanville, TX - USA

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#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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I am/was, but I've been getting a little distracted lately. I'll be sure to check on the adjustment this evening, and post whatever I find out.

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Joel Adams
C3VR Lifetime Member #56
My Link

(click for Texas-sized view!) NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Detent Switch Adjustment (12/23)
11/18/08 1:06am

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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20129

The "adjustment" is basically to push the "plunger" all the way forward to re-set the switch. The "plunger" would be the pin on the switch that the accelerator pedal pushes. Pushing the pin forward would move the entire "guts" of the switch forward. Then, when you mash the pedal all the way down, the switch will automatically set itself to the correct location.

I'm gonna have to go out and uncover my '74 so I can try this myself...then I may be able to remove the hose that I put on it!

On my '74, the switch only works the cowl induction door in the hood, since I have a 4 speed trans, but it is the same switch that works the automatic(400) trans kickdown.

Adams' Apple2008-11-17 22:07:55

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Joel Adams
C3VR Lifetime Member #56
My Link

(click for Texas-sized view!) NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Detent Switch Adjustment (13/23)
11/18/08 2:45am

rraider1
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Woodland, WA - USA

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1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

Joined: 10/14/2003
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Joel Would you be able to take a picture or when you take a look at yours could you look at the picture of mine I posted and see if you see anything diverent

Detent Switch Adjustment (14/23)
11/18/08 9:19am

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Duncanville, TX - USA

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#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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The only difference I've ever seen in these switches was the color of them...white, black, even blue and pink! Some may also bolt up on the other side of the bracket(for different cars, such as Camaros, etc). I don't recal any of them having slots for adjustment on the brackets.

Take a look at This modified pic of yours.

Just push the pin toward the pedal...it might take some persuasion, but it will move/ratchet the inner workings of the switch forward, so the pin will be closer to the pedal to start with, which should give you full contact at about 3/4 throttle.
hth

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Joel Adams
C3VR Lifetime Member #56
My Link

(click for Texas-sized view!) NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Detent Switch Adjustment (15/23)
11/18/08 10:32am

bio11
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Oklahoma City, OK - USA

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1972 LS5 Convertible,Auto.Targa Blue with Black Interior.

Joined: 4/1/2007
Posts: 432

So thats what they call the automatic adjustment huh. Thanks Joel, I'll try mine tonight and take it for a drive. By the way mine is also a tan color like the one in the Pic.

Your Great Joel, next time I'm down that way I have to look ya up.

Lonnie

Detent Switch Adjustment (16/23)
11/18/08 7:25pm

rraider1
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Woodland, WA - USA

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1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

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thanks joel I see if that helps

Detent Switch Adjustment (17/23)
12/8/08 10:48am

bio11
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Oklahoma City, OK - USA

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1972 LS5 Convertible,Auto.Targa Blue with Black Interior.

Joined: 4/1/2007
Posts: 432

Joel was correct again. I moved the peg on the detent switch all the way forward and it clicked. It now works correctly. I did however leave the piece of hose on it.

Detent Switch Adjustment (18/23)
12/8/08 9:41pm

rraider1
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Woodland, WA - USA

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1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

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Bio11 would you be able to take a picture of your switch, mine still doesnot work i will be double checking the circuit.

Detent Switch Adjustment (19/23)
12/8/08 11:41pm

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Duncanville, TX - USA

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#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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Bob, I'll try to get up under the dash of mine tomorrow, and get a pic. I don't think you could install one wrong.
There should be 12v on one of the terminals any time the key is on. When the switch is activated, but the trans connector unplugged, it should have 12v on both sides. IF the wiring to the trans is connected, when you activate the switch, the voltage should go to "0".
You may have a bad kickdown solenoid in the trans, if it still doesn't have a kickdown/passing gear, and the switch is adjusted properly. Adams' Apple2008-12-08 20:42:03

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Joel Adams
C3VR Lifetime Member #56
My Link

(click for Texas-sized view!) NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Detent Switch Adjustment (20/23)
12/9/08 11:09am

bio11
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Oklahoma City, OK - USA

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1972 LS5 Convertible,Auto.Targa Blue with Black Interior.

Joined: 4/1/2007
Posts: 432

Bob I'll see if I have a pic from when I had all the dash apart. I know I have some but don't know if they show the switch.

Detent Switch Adjustment (21/23)
12/9/08 12:29pm

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Duncanville, TX - USA

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#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20129

Here's a couple of shots of mine...I got stuck crawling down under there to get these...I hope youse guys appreciate it...

Click image for link

______________

Joel Adams
C3VR Lifetime Member #56
My Link

(click for Texas-sized view!) NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Detent Switch Adjustment (22/23)
12/9/08 4:42pm

bio11
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Oklahoma City, OK - USA

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1972 LS5 Convertible,Auto.Targa Blue with Black Interior.

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That is exactly like mine on my 72, even the same color.

Detent Switch Adjustment (23/23)
12/9/08 6:19pm

rraider1
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Woodland, WA - USA

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1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

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I really appreciate the picture, mine looks to be installed correctly, I will need to recheck the circuit. to increase the chance the gas pedal would hit the sw lever I used a wine cork, cut with a hole drilled in the midle. thanks again for the picture.

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