79 Camaro speedometer not working
this one is dumping me badly. With the cable disconnected from the transmission and spinning the transmission cable and the speedometer works. With the cable disconnected from the back of the speedometer and attached to the transmission with the wheels lifted I put the car in gear with the engine running and the cable turns increasing speed with engine rpm. There doesn’t seem to be any slippage on either end of the cable to either the transmission or the speedometer but when I put everything together and try to Drive down the road the speedometer does not work any ideas?

 

Play with the cable, I have seen the steel part of an old cable pull out of the speedometer even though the end stays clipped. When I tested the cable I would unintentionally push the cable in a little and everything worked fine but when I hooked it back up and after a few turn it would fall back out of the speedometer. This was caused by wear on the cables outer case wearing clearance giving the steel part of the cable just enough room to fall out of the speedometer.

How are you spinning the cable? Drill? how do you know the gear is turning or that the gear is turning the cable?

 

There is 4 sections to the speedometer .The speedometer itself ,The speedometer tail shaft gear and the speedometer to tail shaft gear .Of of can wear out and break.I also have a 1979 Camaro its a Z-28 RS car .The speedometer has turned over 4 times .With the car stock to a change over to a Super T-10 4 speed and an AutoMeter Speedometer .I used a number of the stock pieces still .Jus replacing the wear Items and greasing the cable as well.