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#1
03-04-2023, 05:02 PM
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Cruise control vacuum release valve
1978 Pontiac Trans Am
Probably a silly question but... My factory cruise control vacuum release switch that is mounted to the bracket in front of the brake pedal makes a loud audible "click" every time I step on the brake. It operates perfectly but I find it rather annoying. Do they all make the loud click or is mine just noisier than normal? |
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#2
03-04-2023, 11:18 PM
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Mine does not click
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1977 Trans Am 400/4speed (swap) Brian |
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#3
03-05-2023, 09:21 AM
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Nor does mine
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1978 Black & Gold T/A [complete 70 Ram Air III (carb to pan) PQ and 12 bolt], fully loaded, deluxe, WS6, T-Top car - 1972 Formula 455HO Ram Air numbers matching Julep Green - 1971 T/A 455, 320 CFM Eheads, RP cam, Doug's headers, Fuel injection, TKX 5 Spd. 12 Bolt 3.73, 4 wheel disc. All A/C cars |
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#4
03-05-2023, 11:30 AM
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Here’s both switches in GM, nOS, no click on either. Remove both, see where the click is.
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🧩 Burds Parts, Finding those Hard to Find PCs, no Fisher Price Toys Here Just Say No To 8” Flakes F ire B irds 🇮🇱 |
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#5
03-05-2023, 04:30 PM
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The top one in the picture is the one clicking. It's the vacuum release valve.
I removed it and found that it is somewhat slow to release and when it finally does it clicks loudly. I tried to clean it up and see if the release action got any better but it didn't. A quick search showed that these switch valves are not readily available and not exactly inexpensive when you do find them. I may just have to live with the click. Thanks everyone. |
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#6
03-05-2023, 04:56 PM
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I forgot to mention that I’m also planning to apply a little silicone lubricant spray to the inside as well to see if the rubber seal softens up a bit to slide more freely in the plastic tube. I hope it works!
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#7
03-05-2023, 08:48 PM
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Well, silicone lubricant spray was definitely not the answer. It actually made it worse. However, after a few dabs of white lithium grease on the inside, it's as good as new...no more clicks!
Last edited by edecker455; 03-05-2023 at 09:30 PM. |
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#8
03-05-2023, 09:49 PM
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I’d just replace it. I just picked up these to have just in case. You can prob get an A-M one pretty easy at the auto parts store.
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🧩 Burds Parts, Finding those Hard to Find PCs, no Fisher Price Toys Here Just Say No To 8” Flakes F ire B irds 🇮🇱 |
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#9
03-10-2023, 11:18 AM
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Quote:
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#10
03-10-2023, 01:40 PM
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I can prob find you a used one, Leme know of you want one still. I found a whole nOS dealer install Cruze kit at Dayton, kept the switches and the 2 spedo cables, sold off rest, I like having spare parts on hand just for problems like yours that pop up
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🧩 Burds Parts, Finding those Hard to Find PCs, no Fisher Price Toys Here Just Say No To 8” Flakes F ire B irds 🇮🇱 |
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