Speedo works backwards

[edhd58]

speedo show forward speed only in reverse, and bottoms out in forward gears. i just now got the speedo cable installed for the 1st time since ive owned the car. its a 42 fordor with a 47 rear end. the turtle will only mount in one direction and allow me to install the cable. if i install it reversed to how it is now I have to cut a hole in the frame.


will reversing the way the turtle mounts make the speedo work correctly?

[ford38v8]

I think you must have the torque tube clocked wrong to force such a mounting of the turtle. Easy check, the center zerk fitting should be straight down at 6 o'clock.

[Kube]

Is the turtle mounted so that the cable attaches to it on the bottom?

Who had the torque tube out? I am wondering if the driven gear - at the end of the driveshaft, was installed backward.
Would that make the speedo run backward? Maybe someone else can answer that with 100% certainty. I think it would but am not entirely certain.

[meric42]

If the torque tube was installed wrong then the radius rods wouldn't mount to torque tube as they should. The mounting point for the radius rods is also on the bottom???

[JSeery]

Originally Posted by Kube

Would that make the speedo run backward? Maybe someone else can answer that with 100% certainty. I think it would but am not entirely certain.

Shouldn't make any difference, the teeth would still be at the same angle.

[edhd58]

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I swapped rear ends because the original rear end had bad gears and it was cheaper to swap than rebuild. The rear swap was a complete assembly swap, nothing was changed on the "new rear" prior to installation.

Torque tube has the e-brake cable mount welded on, on the bottom of the tube.

Now, for my statement I have to drill a hole in the frame -- well it darn sure looked like i would. After flipping the turtle and reinstalling, the cable passes between the frame and a floor support.

I took the turtle off and checked rotation of the cable drive based on mount and sure enuf, rotation changes if you flip it, so I did, speedo works now.

[petehoovie]

Originally Posted by edhd58

I swapped rear ends because the original rear end had bad gears and it was cheaper to swap than rebuild. The rear swap was a complete assembly swap, nothing was changed on the "new rear" prior to installation.

Torque tube has the e-brake cable mount welded on, on the bottom of the tube.

Now, for my statement I have to drill a hole in the frame -- well it darn sure looked like i would. After flipping the turtle and reinstalling, the cable passes between the frame and a floor support.

I took the turtle off and checked rotation of the cable drive based on mount and sure enuf, rotation changes if you flip it, so I did, speedo works now.

It's refreshing when someone reports back on their 'fix'....

[JSeery]

Thanks for the update.

[edhd58]

I guess I'm just goofy. This is the first major undertaking I have done and every time I have success with something I feel like a kid and have to share it with someone.

The picture are how it sits today. but still way far from being "done" if it is ever done.

[meric42]

Good job and nice car - gotta love those rare '42 Fords

[edhd58]

i love the delivery sedans.
i like stuff no on else has.
when i finally go down the road I want people to know who it is because of what it is.
I have not seen another 42 around here.

These pics are how it was when I brought it home

[RalphM]

Looks like you've done a great job on it!

[meric42]

Originally Posted by edhd58

i love the delivery sedans.
i like stuff no on else has.
when i finally go down the road I want people to know who it is because of what it is.
I have not seen another 42 around here.

These pics are how it was when I brought it home

I think that you and I are made from the same stock.

That is exactly why I have my '42's.

I also have a Fordor Ex-army staff car to do one day if I don't run out of time that is