speedometer

MikeRJ · 08-19-2001, 04:38 PM

My speedometer has never worked since I've owned the car(75 911s)and it's finally driven me crazy, I have to fix it. I pulled the speedometer out of the dash and unhooked the trip cable reset and the other cable. I keep reading about tha ERG box that is on a 75 but I don't see one on mine. Is mine electric? Is the cable that goes into it just for the odometer? I did manage to trace the cable back to the tranny and found two bends in the cable (obviously it's broke), but I Didn't see an ERG box. How do tell if the speedometer is electric or mechanical? I've seen two magazines that have electric speedos for 75-89 150 mph and I've also seen cables for the speedos 75-77 w/ERG box.
Thanks

Zendalar · 08-19-2001, 10:06 PM

Does the speedo have any connectors in the back of the gauge? In mine there are only couple connectors to the light, electrical that is. I guess your car would have more connectors on the back that would be marked with letter G.

Early_S_Man · 08-20-2001, 02:24 AM

The electronic speedometer did not come along until the '76 models, and is triggered by a modified version of the 915 transaxle that does not have a cable coming out of the nosecone, but does have a two-wire magnetic sensor on the outside of the ring gear carrier housing on the right side.

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Warren Hall
1973 911S Targa
1992 Dodge Dakota 5.2 4X4 parts hauler

MikeRJ · 08-20-2001, 04:30 PM

Pulled the cable out(up to the point where it was broken) got about a five foot section. Did not see nor could I find an ERG box. I pretty sure it's mechanical in nature. Now the big question is where to get the speedometer refurbished?

Early_S_Man · 08-20-2001, 04:42 PM

How about ... Pelican???

http://www.pelicanparts.com/support/gauge_repair.htm

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Warren Hall
1973 911S Targa
1992 Dodge Dakota 5.2 4X4 parts hauler