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Old 11-12-2019, 09:06 AM   #1
jkflathead
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Default 35 Ford Columbia Speedometer?

I am about to install the controls for an original Columbia two speed rear end in my '35 Ford coupe. Would it be ok to not install the speedometer conversion assembly under the dash? I understand that the speedometer will be off by 10-12 mph. Other than that is there a problem? I guess that I would have to block off one of the vacuum ports going to that mechanism. Advice? Thanks.
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Old 11-12-2019, 10:17 AM   #2
KGS
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Default Re: 35 Ford Columbia Speedometer?

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Originally Posted by jkflathead View Post
I am about to install the controls for an original Columbia two speed rear end in my '35 Ford coupe. Would it be ok to not install the speedometer conversion assembly under the dash? I understand that the speedometer will be off by 10-12 mph. Other than that is there a problem? I guess that I would have to block off one of the vacuum ports going to that mechanism. Advice? Thanks.
No problem. I ran mine for quite a while until I got the changer. Just do the math when in overdrive; increase the indicated speed by 30%. BTW, my changer doesn't use vacuum, it's manually changed.

Last edited by KGS; 11-12-2019 at 10:19 AM. Reason: add info on changer
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Old 11-12-2019, 10:48 AM   #3
Kurt in NJ
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Default Re: 35 Ford Columbia Speedometer?

No vacuum ports for the speedometer, it uses linkage for the original system, perhaps you have later control
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