speedo problem

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Apr 7, 2008 | 10:49 AM

markhperry

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speedo problem

69 400/427 vert. I have bought a new speedometer cable and have checked the working of the cable with a drill, and it moves the needle on the speedometer. I have checked the gear on the transmission and it looks fine. connect the cable to the transmission and it still does not work.. any suggestions?

Apr 7, 2008 | 11:24 AM

dannyman

Melting Slicks

Joined: Dec 2006

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From: Kingston Ontario

Doublecheck, connections are tight.

Apr 7, 2008 | 12:04 PM

76 VETTE

Melting Slicks

Joined: Oct 2005

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From: upstate N.Y.

Did you check the both the driven gear and the drive gear?

Apr 7, 2008 | 12:13 PM

S489

Burning Brakes

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From: AL

since you put the tranny end into a drill, it may be possible that that end is not wanting to go into the end of the speedo gear. it does not take much deformation of the cable for that end to be difficult to slip into the gear. hope that is all . . .

Apr 7, 2008 | 01:22 PM

markhperry

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speedo problem

could there be a problem inside the transmssion?
I believe both gears are alright that go into the transmission.

Apr 7, 2008 | 01:28 PM

S489

Burning Brakes

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From: AL

Quote:

Originally Posted by markhperry

could there be a problem inside the transmssion?
I believe both gears are alright that go into the transmission.

unlikely; the gear in the tranny is metal and the driven gear is plastic. you can pull the driven gear out and take a look . . .

Apr 7, 2008 | 01:29 PM

tigers123

Burning Brakes

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From: belle plaine ks

If the car is a 4 speed the gear that drives the one on the cable end could be slid back. To check that you may need a mirror and a flashlight.

Apr 7, 2008 | 01:49 PM

markhperry

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speedo problem

Do you mean there is a gear inside the transmission that could be pushed back ? I can pull the metal and plastic gear out of the transmission that attaches to the speedo cable.

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Apr 7, 2008 | 02:06 PM

pbcanney

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Quote:

Originally Posted by S489

unlikely; the gear in the tranny is metal and the driven gear is plastic. you can pull the driven gear out and take a look . . .

The driven gear (the one the cable screws into) is plastic. Maybe it just gave up the ghost. Comes out real easy. one bolt. wiggle the driven gear holder out and look at the teeth.

Apr 7, 2008 | 02:08 PM

#10

markhperry

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I have already looked at the plastic gear teeth and they look fine

Apr 7, 2008 | 02:23 PM

#11

pbcanney

Drifting

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Quote:

Originally Posted by markhperry

I have already looked at the plastic gear teeth and they look fine

oops missed that

is it possible the square hole in the driven gear is not square anymore and just rotating around the cable?

Apr 7, 2008 | 02:30 PM

#12

7T1vette

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From: Crossville TN

Recheck the speedo gear where the cable is engaged. That square-drive hole may be worn out....and that could have been your only problem. Remove the gear from the tranny, engage that gear on the cable end, hold the cable firm and see if you can turn the gear anyway. If you can, replace the gear--it's worn out.