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Spring cleaning (engine bay wiring)
#1404506 Sat Apr 03 2021 02:16 AM
Joined: Sep 2018
Posts: 99
N
Noonan Offline OP
'Bolter
Work is moving forward on the 55 chevy 2 ton. I am in the process of tidying up wiring and re-routing it so my engine bay is a bit tidier. Cleaning up under the dash as well along with a bunch of fixes and ...... .... #**$

Installed the sbc a couple years ago. It has about an hour of run time on it so far smile

Pulled the gauge cluster and found the speedo cable end broken off at the cluster.

Can anyone point me in the right direction for a replacement speedo cable for my 55 2 ton ?

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Re: Spring cleaning (engine bay wiring)
Noonan #1404512 Sat Apr 03 2021 03:12 AM
Joined: Mar 2004
Posts: 5,136
M
'Bolter
Takes the same cable and casing as the pickups...

Cable = 58-5/8"
Casing = 57-1/4"
Vendor number = AC-CC-17 (includes Cable & Casing)
Chevy # = 1582863 (includes Cable & Casing)

Does your vacuum 2-speed speedometer ratio adaptor still work? Most have a blown diaphragm...

Mike B smile

Re: Spring cleaning (engine bay wiring)
Mike B #1404530 Sat Apr 03 2021 06:09 AM
Joined: Sep 2018
Posts: 99
N
Noonan Offline OP
'Bolter
Thanks Mike,

I had actually pulled the cluster to verify I had no vacuum leaks at the ratio adapter and to check the operation, but i got drawn into the wiring job and forgot. i will have a look at that tomorrow and let you know what I find.

Re: Spring cleaning (engine bay wiring)
Noonan #1404581 Sat Apr 03 2021 03:18 PM
Joined: Dec 2020
Posts: 110
2
'Bolter
I have to rebuild our two speed adapter also. I was thinking of using a choke pull-off/vacuum brake to replace the unit. I can't imagine being able to find a replacement.

Post your story in the project journals section. I would love to read your story.

Steve

Re: Spring cleaning (engine bay wiring)
Mike B #1411646 Thu May 27 2021 10:28 PM
Joined: Dec 2018
Posts: 713
F
'Bolter
Mike B On the 2-speed ratio adapter ,can you make a diaphragm out of bat wing for those ?? I can't recall where I got bat-wing but will think of it ssoon. Our local Marathon refinery may have it,in their instrument repair shop.

Re: Spring cleaning (engine bay wiring)
Noonan #1411677 Fri May 28 2021 02:00 AM
Joined: Mar 2004
Posts: 5,136
M
'Bolter
I don't know what "bat wing" is and I've never tried to make a diaphragm for the adaptor. If you figure out how to repair/replace it please share with us!

Mike B smile

Re: Spring cleaning (engine bay wiring)
Mike B #1411698 Fri May 28 2021 04:39 AM
Joined: Sep 2011
Posts: 926
B
'Bolter
Originally Posted by Mike B
I don't know what "bat wing" is and I've never tried to make a diaphragm for the adaptor. If you figure out how to repair/replace it please share with us!

Mike B smile


X2
I've got a 59 cluster with leaking diaphragm.


BC
1960 Chevy C10 driver 235 T5 3.73 dana 44
1949 GMC 250 project in waiting
1960 C60 pasture art
G.M dealer tech since 1980 & counting
Re: Spring cleaning (engine bay wiring)
Mike B #1411723 Fri May 28 2021 02:27 PM
Joined: Dec 2018
Posts: 713
F
'Bolter
Mike B Bat wing is like a soft pliable gas regulator diaphragm material,I learned how to harvest it out of gas regulators. Trouble is it always has a hole in the center. Once had a governored propane 2 barrel that needed a diaphragm every 3 or 4 years.

Re: Spring cleaning (engine bay wiring)
BC59 #1411725 Fri May 28 2021 02:41 PM
Joined: Dec 2018
Posts: 713
F
'Bolter
BC59 From the picture I saw It was not a very big diaphragm So would take a light material,have seen it in big boiler draft gauges and it does remind you of a bats wing !

Re: Spring cleaning (engine bay wiring)
Noonan #1411849 Sat May 29 2021 03:21 PM
Joined: Sep 2019
Posts: 223
C
'Bolter
My 55 chevy first 6400 uses a mechanical speedometer ratio adapter that is operated off the axle shift control shaft under the dash and I have a extra. It would be easy to fabricate a rod with a knob to operate it.


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