 Speedometer drive cable too short?, successfully tested from both ends |
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| carl k |
 Nov 29 2009, 08:27 PM
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#1
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Member  Group: Members Posts: 76 Joined: 19-August 08 From: San Jose, CA Member No.: 9,440 Region Association: None 
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When I got my '74, the speedometer angle drive was missing and the speedo cable was severely bent. I replaced the speedometer angle drive with a good used unit and put in a brand new Gemo speedometer cable. The speedometer/odometer still doesn't work.
Here's the interesting part, when I disconnect the cable from the speedometer, leave it hanging under the dash, and drive around, I can see and feel the speedometer inner cable turning. Alternately, when I reconnect the cable to the speedo and spin the back end (at the transmission) with a drill, the speedometer and odometer work. It's as if the cable inner is just a tad too short to engage both ends at the same time. Both knurled nuts were tightened all the way. Any experiences like this? Any suggestions? thanks, Carl K. |
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Replies(1 - 3)
| VaccaRabite |
Nov 29 2009, 09:08 PM
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#2
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En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
I would bet that the speedo/odo is just broken. The Odo being broke is common. The gears are plastic and strip out. I assume that the speedo is similar.
Zach |
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| carl k |
Nov 30 2009, 09:04 PM
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#3
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Member Group: Members Posts: 76 Joined: 19-August 08 From: San Jose, CA Member No.: 9,440 Region Association: None
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Well I figured out the problem. When I spun the speedo drive cable counterclockwise, the speedo worked. When I drove around with the speedo cable loose and hanging below the dash, it was running clockwise. Turns out the angle drive gearbox I bought from a 914World member was from a 911 (part number 901 318 029 01) and these turn the opposite direction.
Carl K. |
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| r_towle |
Nov 30 2009, 09:07 PM
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#4
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Custom Member Group: Members Posts: 24,591 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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Sorry, but cool to know.
Rich |
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