 Speedometer Diagnosis |
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| bobforman |
 Jun 3 2023, 02:04 PM
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#1
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Newbie  Group: Members Posts: 31 Joined: 7-April 09 From: Seattle Member No.: 10,242 Region Association: Pacific Northwest  |
My speedometer suddenly quit working. What steps do I need to take to figure out the problem?
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| mgphoto |
Jun 3 2023, 05:46 PM
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#2
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"If there is a mistake it will find me" Group: Members Posts: 1,339 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
QUOTE(bobforman @ Jun 3 2023, 01:04 PM)  My speedometer suddenly quit working. What steps do I need to take to figure out the problem? There is an angle drive at the rear of the transmission, remove the large nut holding the cable, remove the cable and test the cable by twisting the inner cable if there is resistance try the angle drive, needle nose pliers twist the inner flange if it moves without any resistance the angle drive is broken, if that is ok then your speedometer is broken. Just helped a member here replace the cable today. |
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| Stef914 |
Jun 3 2023, 06:31 PM
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#3
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Member Group: Members Posts: 70 Joined: 21-July 21 From: Los Angeles Member No.: 25,745 Region Association: Southern California |
With big help and guidance of the almighty @mgphoto we replaced the broken speedometer cable today .
Steps : 1 New GEMO speedometer cable from pelican parts for $50 2 Disassemble center console and harm rest 3 Remove driver seat and carpets 4 Unscrew speedometer cable from VDO and attached twine to end 5 Pull speedometer cable from transmission end all the way out 6 Attached twine to new speedometer cable 7 Pull new cable with twine thru firewall the opposite way it came from, all the way back to dashboard and screw it back inside VDO 8 Test 9 Reassemble everything Estimated time 2 hrs approximately Hope it helps |
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| mgphoto |
Jun 3 2023, 08:15 PM
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#4
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"If there is a mistake it will find me" Group: Members Posts: 1,339 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
QUOTE(Stef914 @ Jun 3 2023, 05:31 PM) With big help and guidance of the almighty @mgphoto we replaced the broken speedometer cable today . Steps : 1 New GEMO speedometer cable from pelican parts for $50 2 Disassemble center console and harm rest 3 Remove driver seat and carpets 4 Unscrew speedometer cable from VDO and attached twine to end 5 Pull speedometer cable from transmission end all the way out 6 Attached twine to new speedometer cable 7 Pull new cable with twine thru firewall the opposite way it came from, all the way back to dashboard and screw it back inside VDO 8 Test 9 Reassemble everything Estimated time 2 hrs approximately Hope it helps He makes it sound easy. |
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| rjames |
Jun 3 2023, 08:24 PM
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#5
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I'm made of metal Group: Members Posts: 3,932 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest 
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My speedo went to 0 during a drive today, too. Must be a bad day for speedos. Hope it's just the cable.
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| bobforman |
Jun 5 2023, 09:02 PM
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#6
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Newbie Group: Members Posts: 31 Joined: 7-April 09 From: Seattle Member No.: 10,242 Region Association: Pacific Northwest |
Thanks for the responses. I'll start on this tomorrow. Stay tuned.
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| Dave_Darling |
Jun 5 2023, 11:13 PM
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#7
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914 Idiot Group: Members Posts: 14,985 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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You can remove the speedometer from the dash and disconnect the drive cable from the back. Have someone hold onto the cable while you drive the car and see if the slotted end spins. If not, the problem is in the cable or the angle drive or inside the transmission. If it does spin (and goes faster the faster you drive) the problem is the gauge.
The cable is the most likely problem. --DD |
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