The Ford Barn

Wopcmh · 01-20-2019, 02:52 AM

Speedo only works in reverse
Hello any help much appreciated
I have a recently restored 1934 Ford Deluxe 5 Window Coupe and the speedo has never worked in forwards direction but does work in reverse.
I disconnected the cable from drive worm on top of the enclosed tail shaft and used a battery drill to spin the cable. The speedo works in the anti clockwise direction but that is when you are in reverse.
Do i have the incorrect speedo ?
Can I change the direction the cable spins?
Is it possible to change the direction of the drive gear on the tail shaft ?
Cheers Chris

flatheadmurre · 01-20-2019, 03:02 AM

If you have the turtle on the torquetube turned 180degree it goes the wrong way...if i´m not having a before coffe moment...

Mart · 01-20-2019, 03:46 AM

No coffee required. Turning the speedo drive (turtle) on the torque tube 180 degrees will reverse the direction of rotation of the cable. In this case it will un-reverse the cable rotation.

Mart.

Wopcmh · 01-20-2019, 05:08 AM

Thanks i will give it try
I had thought of that but the worm drive in the turtle is angled so I didn’t think it would mesh with the drive if i turned it 180.
I will take it off again and have another go. Keep you posted

edhd58 · 01-20-2019, 03:31 PM

the gear turned 180 simply puts the shaft output end on the other end, making the speedo cable turn the other direction. I did this same thing putting mine together.

Graham Freeman · 01-20-2019, 06:57 PM

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How does the speedo go in reverse? does it not have a stop pin at the zero mark? is this missing?

philipswanson · 01-20-2019, 09:45 PM

Maybe you put the body on the frame backwards.

Anteek29 · 01-21-2019, 12:56 AM

Quote:

Originally Posted by philipswanson

Maybe you put the body on the frame backwards.

Now that's funny!

flatheadmurre · 01-21-2019, 05:45 AM

Quote:

Originally Posted by Graham Freeman

How does the speedo go in reverse? does it not have a stop pin at the zero mark? is this missing?

Probably more like it shows forward movement while reversing...

1952henry · 01-21-2019, 04:28 PM

Scratch the paint and see if it disappears. If it does, you have a special car. Just ask Arnie Cunningham. Oops, I guess that is not possible.

GB SISSON · 01-22-2019, 07:47 PM

I thought this was going to be the joke about the two European guys on the beach and the potato.....

Detonator · 01-23-2019, 12:58 AM

No, the potato was the two lawyers wearing the Speedos..... just to bring it back around

grumppyoldman · 01-24-2019, 07:02 PM

If the drive gear is a bevel cut gear, turning it 180 deg. will destroy the driven gear. They don't work so well like that. Maybe a straight cut gear would work, but not a bevel cut one. Al

Mart · 01-25-2019, 03:39 AM

Grumps, that's not right. 90 degrees, yes, 180 degrees, no.

The turtle can only be rotated 180 degrees so it is ok to do so. In fact, it is already working 180 degrees from the correct position, hence the speedo only registering when the car is going in reverse.

Mart.

Dodge · 01-25-2019, 04:16 AM

Maybe it’s like the old Australian saying the toilets flush the other direction.....

flatheadmurre · 01-25-2019, 04:33 AM

So all australian speedos work anti clockwise then...just to be in sync with the flushing...

cas3 · 01-26-2019, 12:44 AM

if you are down under, which way is up?

ford38v8 · 01-26-2019, 01:10 AM

Quote:

Originally Posted by cas3

if you are down under, which way is up?

Be sure to ask the next Aussie you see wearing his speedo backwards. you may then liven up the conversation with your observation of which direction the water swirls in an Aussie toilet.

01-20-2019, 02:52 AM	#1
Wopcmh Junior Member Join Date: Jan 2019 Location: Mandurah Posts: 2	Speedo goes backwards Speedo only works in reverse Hello any help much appreciated I have a recently restored 1934 Ford Deluxe 5 Window Coupe and the speedo has never worked in forwards direction but does work in reverse. I disconnected the cable from drive worm on top of the enclosed tail shaft and used a battery drill to spin the cable. The speedo works in the anti clockwise direction but that is when you are in reverse. Do i have the incorrect speedo ? Can I change the direction the cable spins? Is it possible to change the direction of the drive gear on the tail shaft ? Cheers Chris

01-20-2019, 03:02 AM	#2
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: Speedo goes backwards If you have the turtle on the torquetube turned 180degree it goes the wrong way...if i´m not having a before coffe moment... Last edited by flatheadmurre; 01-20-2019 at 04:39 AM. Reason: spelling...

01-20-2019, 03:46 AM	#3
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,750	Re: Speedo goes backwards No coffee required. Turning the speedo drive (turtle) on the torque tube 180 degrees will reverse the direction of rotation of the cable. In this case it will un-reverse the cable rotation. Mart.

01-20-2019, 05:08 AM	#4
Wopcmh Junior Member Join Date: Jan 2019 Location: Mandurah Posts: 2	Re: Speedo goes backwards Thanks i will give it try I had thought of that but the worm drive in the turtle is angled so I didn’t think it would mesh with the drive if i turned it 180. I will take it off again and have another go. Keep you posted

01-20-2019, 03:31 PM	#5
edhd58 Senior Member Join Date: Jul 2014 Location: Guston,ky Posts: 653	Re: Speedo goes backwards the gear turned 180 simply puts the shaft output end on the other end, making the speedo cable turn the other direction. I did this same thing putting mine together.

01-20-2019, 06:57 PM	#6
Graham Freeman Senior Member Join Date: May 2010 Location: New Zealand Posts: 298	Re: Speedo goes backwards Sponsored Links (Register now to hide all advertisements) How does the speedo go in reverse? does it not have a stop pin at the zero mark? is this missing?

01-20-2019, 09:45 PM	#7
philipswanson Senior Member Join Date: Oct 2015 Location: Bonita, CA Posts: 1,374	Re: Speedo goes backwards Maybe you put the body on the frame backwards. Last edited by philipswanson; 01-20-2019 at 10:53 PM.

01-21-2019, 04:28 PM	#10
1952henry Senior Member Join Date: May 2010 Location: North Dakota Posts: 1,619	Re: Speedo goes backwards Scratch the paint and see if it disappears. If it does, you have a special car. Just ask Arnie Cunningham. Oops, I guess that is not possible. __________________ I dig coal, which provides motivation for EVs.

01-22-2019, 07:47 PM	#11
GB SISSON Senior Member Join Date: Jan 2014 Location: Orcas Island Washington Posts: 4,929	Re: Speedo goes backwards I thought this was going to be the joke about the two European guys on the beach and the potato..... __________________ Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1947 Tonner Pickup (red) mostly stock with exception of a cummins 6at turbo diesel, 1946 Tonner Pickup (green) with 226 cu in 6 cyl flathead, 1979 Toyota landcruiser wagon, completely encased in 1947 Ford Jailbar sheet metal. Ok, cornbinder rear fenders..... 'Rusty ol' floorboards, hot on their feet' (Alan Jackson)

01-23-2019, 12:58 AM	#12
Detonator Senior Member Join Date: May 2010 Location: Santa Cruz Posts: 391	Re: Speedo goes backwards No, the potato was the two lawyers wearing the Speedos..... just to bring it back around __________________ Seabright Hot Rods

01-24-2019, 07:02 PM	#13
grumppyoldman Senior Member Join Date: Apr 2017 Location: Texas Gulf Coast Posts: 727	Re: Speedo goes backwards If the drive gear is a bevel cut gear, turning it 180 deg. will destroy the driven gear. They don't work so well like that. Maybe a straight cut gear would work, but not a bevel cut one. Al

01-25-2019, 03:39 AM	#14
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,750	Re: Speedo goes backwards Grumps, that's not right. 90 degrees, yes, 180 degrees, no. The turtle can only be rotated 180 degrees so it is ok to do so. In fact, it is already working 180 degrees from the correct position, hence the speedo only registering when the car is going in reverse. Mart.

01-25-2019, 04:16 AM	#15
Dodge Senior Member Join Date: Nov 2011 Location: Sonoma, CA. Posts: 1,495	Re: Speedo goes backwards Maybe it’s like the old Australian saying the toilets flush the other direction.....

01-25-2019, 04:33 AM	#16
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: Speedo goes backwards So all australian speedos work anti clockwise then...just to be in sync with the flushing...

01-26-2019, 12:44 AM	#17
cas3 Senior Member Join Date: Jan 2011 Location: sw minnesota Posts: 4,573	Re: Speedo goes backwards if you are down under, which way is up?