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RX-7 1st Gen Specific (1979-85) RX-7 1979-85 Discussion including performance modifications and technical support sections

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Old 06-04-2017, 08:38 PM   #1
FC Zach
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Quote:
Originally Posted by Mperell1 View Post
The mechanic I took the car to to double check said it's not a cable, but the actual speedometer. I'm having a rough time finding a new one. Thanks for the tips!
Doubting that. . . I would check the gear in the transmission (cable attaches to this by hand and is held in place by one 6mm screw), this gear is made if plastic and does fail.
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Old 06-04-2017, 08:43 PM   #2
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Until I saw this. . pretty sure the gauge should return to zero when cable isn't rotating. I'd still check the gear in the transmission for the hell of it.

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Old 06-05-2017, 09:44 AM   #3
infernosg
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I thought all LS models had a digital clock.

For the needle to be stuck at a certain speed like that makes me think something is off in the speedometer. My understanding is the speedometer should read "0" unless it's getting a signal from the speedometer cable. Does the speedometer work above 35 mi/hr?

I just noticed this weekend my speedometer is bouncing at lower speeds. I don't recall it doing this before so maybe it's a function of the higher ambient temperatures we've had lately. Either way, it appears the signal being generated by the cable is being disrupted somehow.
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