Re: Electrical clicking with clutch depressed

Posted by HH56 On 2012/12/15 15:01:15

Any switch can go bad but since you hear the click at 22mph it doesn't sound like your lockout switch has a problem. The failure that has been reported more than once on the pre 51's is the plastic plunger end wears. When that happens the switch internals can't move enough and complete the circuit when the knob is all the way in. No OD at all when that happens. The 51-54 switch is located on the OD unit and operated by the lockout rail. Don't recall anyone mentioning a problem with those. 55-56 had no lockout switch.

I can't think of anything electrical under a stock car that would make a rhythmic clicking noise. Unless someone has done some strange wiring, pulling the OD fuse prevents the solenoid from making it's clunk sound. As Ross mentions, even with the fuse out the firewall relay will still click when a ground is provided. The only clutch related way that I can think of is if the clutch linkage might somehow be touching against the wire going to the lockout switch and governor and making it short against something. If so, vibration could possibly cause it to make and break to energize the relay. Would expect the click noise to be very erratic if that were the case.