67 Mustang clutch safety switch
Gee, I’m blogging again! Life in the shop is pretty much full-time trying to get my 67 Mustang back on the road! So, a safety switch for the clutch in a 67 Mustang? Did it ever have one? The almighty search engine doesn’t reveal one to me:( Guess I’ll have to make one;)
With the entire system setup as you see, I can stare at it visualizing a clutch switch, or Clutch interlock switch, and no, the hydraulic clutch isn’t working yet:(
Why do I need one? All stick-shift cars today have a clutch safety switch! If there weren’t, cars/trucks would be crashing through walls/doors, etc!!
I won’t go into grizzly detail, but it took a couple of days to figure a clutch switch out, not to mention computer time, and eventually ordering a possible switch!
First, I had some 3/4″ square tubing lying around, and I cut a slot with a 4″ cutoff wheel, then welded that to a piece of 3/4″ flat bar to be able to bolt it to the swingarm mount. A piece of the same 3/4″ flat bar I welded to the clutch pedal, had to do some grinding for clearance.
Now, as crude as it may look, I used some of the same 3/4″ flat bar to make the slide and adjusting ability. The clutch switch I used is from a 99 Miata or so, 5.00 bucks on ebay.
Running it through its range of motion, I achieved a direct contact without is “sliding” possibly eroding the tip of the plastic~ don’t want to wear it out!;)
With foot pressure applied: Notice on the actuator arm, I had to grind more metal off of it for clearance.
With the instrument cluster removed, well, mines been not there for a long time and same goes for the under the dash wiring harness, it’s easy to see and service;)
I thought there would be more room under the dash area, but there is a 1/2″ to spare between the little flat bar and the cowl! Perfect!
I’m not quite done, still have to wire the switch. The wiring under the dash was for a C4 automatic trans. I’ll be using the wiring which goes to the neutral safety switch to make this work~ hopefully;) There may be better ways, even something stock, but this will have to do for now;)
A short blog indeed~ I’ll be back to add to it after I see that it’ working effectively!
dne’ 😉
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- Posted by admin
- Posted in 67 Mustang Coupe Blog Posts, Uncategorized
- Mar, 05, 2019
- 3 Comments.
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I’m confused. Why would a 1967 Ford Mustang have or need a clutch safety switch? Had they even been invented that long ago? In what year were they first legally required? I’m thinking maybe by the late 90’s but not in 1967. Are you trying to fix a non existent problem or just trying to make your rebuild a wee bit safer?
Hi Bruce! I’m going to have to look deeper into when the switch was implemented. Ultimately it’s for safety reasons. I’d probably be the only one driving it, but it’s one of calls “like while I have it this far apart”, do it now. My Triumph TR6 which is basically a 99 Miata with a 5 speed trans has a clutch safety switch(I have it by-passed right now), it was in the wiring already an a clutch interlock, so it was easy enough to make that happen. Let’s say I let one of my adult kids drive one of my classics(never happen),but sometimes when you think you’re in neutral; might not be, so hitting the ignition switch and it’s actually in a gear, lurches forward/possibly starts, of course you and I know better and simply push the clutch in. meh, peace of mind or as you put it, “wee bit safer”. Another thought was to incorporate a “covered switch” like in an airplane, to use a by-pass of the clutch switch. Right now there are no seats in my stang due to re-restoration, so the clutch switch would be a pain. I hope this answered your question;) I guess another thought, it was another challenge to incorporate it, and I made it; whether it’s used or not;) ps: I do remember seeing a switch while googling, that perhaps the foxbody stangs started incorporating a clutch switch.
thank you Bruce for asking!
dne’ 😉
Thank you for the prompt explanation. It’s possible that the later fox bodies had a safety switch.