Mechanical Clutch 5-speed: Reverse Switch Access - Alfa Romeo Bulletin Board & Forums

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Old 02-24-2012, 10:16 PM
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Mechanical Clutch 5-speed: Reverse Switch Access

Is it possible to access the reverse switch in-situ on a 5-speed with mechanical clutch? The switch on my Giulia is mostly working but has high resistance: I don't need to replace it, but I would like to spray it down with contact cleaner to try to fix the problem.

I know that replacing the switch requires transmission removal, but is there any way to get close enough to it to spray it down in the car? Pulling off the clutch access cover or something?

Just wanted to check if it was even worth trying. Thanks for any suggestions.
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Old 02-24-2012, 11:07 PM
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Contact cleaner shouldn't destroy a clutch disc, so you might just try going in through the pivot fork access hole and blasting away in the general direction of the switch.

Check the switch wires where they pass through the bellhousing. I have seen them worn through the insulation and shorting out there. That could be a problem.

Otherwise, last time I was faced with yanking a transmission to swap a $2 switch, I did what the **** factory should have done in the first place. I went to Radio Shack, bought a small switch with a bit of an arm on it, made a simple bracket, and mounted the switch on top where the gear lever would actuate it when placed in reverse.

bs
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Old 02-25-2012, 12:29 PM
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Yeah, lazy minds think alike. Just spraying the crap out of everything was my first thought I was wondering if there was a more technical way to do things, but that's my fallback.

It's definitely the switch itself. It opens and closes properly, but when it closes it still shows high resistance...only a couple of ohms, but it's enough to keep the bulbs from lighting. There's probably some schmutz on the contacts.
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Old 02-29-2012, 10:08 PM
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Turns out up on the passenger side there's an opening that gives you a clear shot at the switch. Didn't fix the problem, unfortunately, but worth a shot.
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Old 02-29-2012, 10:40 PM
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Quote:
Originally Posted by Gubi View Post
Turns out up on the passenger side there's an opening that gives you a clear shot at the switch. Didn't fix the problem, unfortunately, but worth a shot.
Can you see where the wires go through the bell housing?
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Old 02-29-2012, 11:01 PM
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Not clearly, but I doubt that's the issue. If they were shorting there I'd be blowing fuses and see a short on the meter. From the look of things the issue is that the switch is a bit too far forwards and may not be getting pressed firmly enough by the selector rod.
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