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1957 - 1960 F100 & Larger F-Series Trucks Discuss the Box Style Ford Trucks

Part identification???

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Old 04-26-2018, 02:26 PM
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Part identification???

Hi guys,

i was pulling apart a speedo cluster I acquired from a f600 and noticed that it had a box that attached in between the start of the speedo cable and the back of the speedo. I’m wondering if my 59 f100 is missing this or if it is just a f600 thing.

 
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Old 04-26-2018, 05:02 PM
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That’s a mini gear reduce. It’s for using different transmissions with the same gauge cluster.
 
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Old 04-26-2018, 05:24 PM
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Originally Posted by G-Force junky
That’s a mini gear reduce. It’s for using different transmissions with the same gauge cluster.

Actually I think this a Speedometer mounted speed governor. Hence the electrical connections.
ND will be able to tell us for sure.
 
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Old 04-26-2018, 05:27 PM
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Ahh I should have taken a closer look. Didn’t notice the wires.
 
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Old 04-26-2018, 09:28 PM
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Originally Posted by Dennis-

I was pulling apart a speedo cluster I acquired from a F600 and noticed that it had a box that attached in between the start of the speedo cable and the back of the speedo.

I’m wondering if my 59 F100 is missing this (it isn't). It's just a 500 and larger series truck thing.
You won't find this puppy on a F100/350.

B9TF-17294-E (replaced FEM-17294-A) .. Speedometer Cable Adapter Assy - Contains built in solenoid - Use with Two & Three Speed Rear Axles.

1957/72 F500/1100; 1957/77 P500; 1963/69 N/NT500/1100
 
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Old 04-27-2018, 03:22 AM
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Thanks guys,

excuse my inexperience, but what exactly is its function? Would it act similar to an overdrive govener and send a signal to engage the 2/3 speed rear end at a certain mph?
 
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Old 04-27-2018, 10:05 AM
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It compensates for the different gear ratios of a multi speed rear axle, making sure the speedo reads correctly.
 
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Old 04-27-2018, 01:29 PM
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Ohhh darn, so simple. Thanks for that!
 
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