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Old 04-25-2019, 07:38 PM   #1
sfcharr
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Overdrive kick-down switch bracket for straight six

I am trying to get my overdrive transmission working as designed but I'm missing the kick-down switch and bracket. Does anyone have a picture of the bracket? I am good a fabricating but would like an idea as to where to start. My searches for this bracket has come up empty, 250 straight six.

thanks in advance

Anyone have a picture or a diagram?

Last edited by sfcharr; 04-29-2019 at 09:30 PM.
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Old 04-25-2019, 10:37 PM   #2
geezer#99
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Re: Overdrive kick-down switch bracket for straight six

What overdrive are you talking about?
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Old 04-26-2019, 07:58 AM   #3
sfcharr
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Re: Overdrive kick-down switch bracket for straight six

It's a Muncie, 3 speed. With a a non-syncro 1 gear. I am trying to get it operating as it was designed, at least as close as I can get it. I just need some ideas on the kick-down bracket
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Old 04-27-2019, 08:00 AM   #4
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Re: Overdrive kick-down switch bracket for straight six

I am doing the same project later this summer. I have a 72 with a 292 so it should be close to the same. How far along are you?
I have a kickdown switch and bracket but the bracket is for a 63 Impala I believe was a 283. judging from the oily film on it, it was mounted on the carb. I was thinking of mounting it on the bracket the gas pedal is mounted on so it comes in contact with the cable. I'll send you a picture of the switch and bracket later.
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Old 04-27-2019, 10:15 AM   #5
sfcharr
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Re: Overdrive kick-down switch bracket for straight six

I have everything to complete. Need to fab the bracket, then mount the relay, hook the harness up, should be ready for testing.
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Old 04-29-2019, 09:30 PM   #6
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Re: Overdrive kick-down switch bracket for straight six

Ttt
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Old 05-01-2019, 07:23 AM   #7
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Re: Overdrive kick-down switch bracket for straight six

Name:  brak.jpg
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72 C20 292 3OTT
77 GMC 2500 4x4 Longstepper 350 4sp
50 3100 ex Airforce/Town of Mendon fire truck
72 GMC 1500 2wd short stepside 250 4sp
78 GMC 2500 4x Longstepper 292 4sp
54 6400 Chevy 5 window 4 sp 2sp vac rear end Shell oil truck/dump truck (Norman)
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Old 05-01-2019, 07:24 AM   #8
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Re: Overdrive kick-down switch bracket for straight six

Name:  brak1.jpg
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72 C20 292 3OTT
77 GMC 2500 4x4 Longstepper 350 4sp
50 3100 ex Airforce/Town of Mendon fire truck
72 GMC 1500 2wd short stepside 250 4sp
78 GMC 2500 4x Longstepper 292 4sp
54 6400 Chevy 5 window 4 sp 2sp vac rear end Shell oil truck/dump truck (Norman)
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Old 05-01-2019, 07:24 AM   #9
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Re: Overdrive kick-down switch bracket for straight six

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72 C20 292 3OTT
77 GMC 2500 4x4 Longstepper 350 4sp
50 3100 ex Airforce/Town of Mendon fire truck
72 GMC 1500 2wd short stepside 250 4sp
78 GMC 2500 4x Longstepper 292 4sp
54 6400 Chevy 5 window 4 sp 2sp vac rear end Shell oil truck/dump truck (Norman)
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Old 05-01-2019, 07:26 AM   #10
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Re: Overdrive kick-down switch bracket for straight six

Name:  brak4.jpg
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Sorry it took so long to do this. Hope this helps.
What gear oil did you use in your transmission?
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72 C20 292 3OTT
77 GMC 2500 4x4 Longstepper 350 4sp
50 3100 ex Airforce/Town of Mendon fire truck
72 GMC 1500 2wd short stepside 250 4sp
78 GMC 2500 4x Longstepper 292 4sp
54 6400 Chevy 5 window 4 sp 2sp vac rear end Shell oil truck/dump truck (Norman)
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Old 05-01-2019, 07:29 AM   #11
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Re: Overdrive kick-down switch bracket for straight six

Name:  brak3.jpg
Views: 177
Size:  28.7 KB
__________________
72 C20 292 3OTT
77 GMC 2500 4x4 Longstepper 350 4sp
50 3100 ex Airforce/Town of Mendon fire truck
72 GMC 1500 2wd short stepside 250 4sp
78 GMC 2500 4x Longstepper 292 4sp
54 6400 Chevy 5 window 4 sp 2sp vac rear end Shell oil truck/dump truck (Norman)
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Old 05-01-2019, 08:23 AM   #12
sfcharr
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Re: Overdrive kick-down switch bracket for straight six

Thank you so much! I assume this bracket was bolted to the base of carb?
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Old 05-01-2019, 08:31 AM   #13
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Re: Overdrive kick-down switch bracket for straight six

Quote:
Originally Posted by sfcharr View Post
Thank you so much! I assume this bracket was bolted to the base of carb?
I don't know. I got it like this. I sure looks lie it but again I think it came off of a 283.
What gear oil did you use in the transmission? Did you find an original relay?
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72 C20 292 3OTT
77 GMC 2500 4x4 Longstepper 350 4sp
50 3100 ex Airforce/Town of Mendon fire truck
72 GMC 1500 2wd short stepside 250 4sp
78 GMC 2500 4x Longstepper 292 4sp
54 6400 Chevy 5 window 4 sp 2sp vac rear end Shell oil truck/dump truck (Norman)
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Old 05-01-2019, 08:51 AM   #14
sfcharr
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Re: Overdrive kick-down switch bracket for straight six

I believe I used GL1 gear oil as recommended by online sources. The relay I have to use is a Standard Motor Products RY12 Relay. I have converted the engine to electronic ignition and have been told this is the relay to use for this setup.
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Old 05-01-2019, 09:13 AM   #15
NewBayColony
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Re: Overdrive kick-down switch bracket for straight six

Quote:
Originally Posted by sfcharr View Post
I believe I used GL1 gear oil as recommended by online sources. The relay I have to use is a Standard Motor Products RY12 Relay. I have converted the engine to electronic ignition and have been told this is the relay to use for this setup.
Thanks.
__________________
72 C20 292 3OTT
77 GMC 2500 4x4 Longstepper 350 4sp
50 3100 ex Airforce/Town of Mendon fire truck
72 GMC 1500 2wd short stepside 250 4sp
78 GMC 2500 4x Longstepper 292 4sp
54 6400 Chevy 5 window 4 sp 2sp vac rear end Shell oil truck/dump truck (Norman)
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