Speedometer noise - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Fbks_Cruiser** · 04-25-2020, 10:16 PM

This winter, I started to hear a noise from the speedometer. Kind of a chirping buzz sound that varied with speed. I attributed it to cold as it seemed to go away after the cab got good and warm. Well, it is now making the noise all the time and it seems to be louder. And it is no longer cold. The speedometer has been working without jumping around even though is is making that chirping sound.

Well, today on a couple of occcasions, the chirp turned into louder constant buzz and the speedo needle would jump up to 90, down to 20 then the buzz would stop and it would settle back in at 60 mph with the chirp sound. A few years ago I replaced the speedo cable. I’m thinking this is more of a problem with the speedometer. What do you guys think?

**HO455** · 04-25-2020, 10:37 PM

Sounds like you need to talk with Tbone1964. Drop him a PM he will be able to diagnose your noise.

Willys_MB · 04-25-2020, 10:47 PM

You probably need to pull the cable and clean and lube it. Once I lubed mine I had no problems. I was having this exact same issue before I did that. I just sprayed the cable and housing down with brake cleaner until what was coming out turned clear and then coated the cable in white lithium grease. Some guys don’t like using white lithium grease and will have you go by speedometer cable. There are varying opinions about that, but I’ve never had a problem with white lithium grease

**Fbks_Cruiser** · 04-25-2020, 11:11 PM

Thanks guys. I too thought Tbone might have an idea. Pulling and lubing the cable might be any easy first step. It probably only has 4000 miles on it, but I can give that a try. I do have another instrument cluster I could maybe swap the speedometer from, but really don't want different mileage showing on the odometer.

slikside · 04-26-2020, 06:05 PM

Quote:

Originally Posted by Willys_MB

You probably need to pull the cable and clean and lube it. Once I lubed mine I had no problems. I was having this exact same issue before I did that. I just sprayed the cable and housing down with brake cleaner until what was coming out turned clear and then coated the cable in white lithium grease. Some guys don’t like using white lithium grease and will have you go by speedometer cable. There are varying opinions about that, but I’ve never had a problem with white lithium grease

^^^^^This^^^^^^

Mine was noisy and bouncy. No more.

Astro-Balls · 04-26-2020, 06:13 PM

Mine had the exact same symptoms, a Good cleaning of both the cable and the housing , using the correct lube solved it.

04-25-2020, 10:16 PM	#1
Fbks_Cruiser Senior Member Join Date: Apr 2016 Location: Fairbanks, AK Posts: 343	Speedometer noise This winter, I started to hear a noise from the speedometer. Kind of a chirping buzz sound that varied with speed. I attributed it to cold as it seemed to go away after the cab got good and warm. Well, it is now making the noise all the time and it seems to be louder. And it is no longer cold. The speedometer has been working without jumping around even though is is making that chirping sound. Well, today on a couple of occcasions, the chirp turned into louder constant buzz and the speedo needle would jump up to 90, down to 20 then the buzz would stop and it would settle back in at 60 mph with the chirp sound. A few years ago I replaced the speedo cable. I’m thinking this is more of a problem with the speedometer. What do you guys think? __________________ 1972 GMC K2500 Super Custom Matt

04-25-2020, 10:37 PM	#2
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,393	Re: Speedometer noise Sounds like you need to talk with Tbone1964. Drop him a PM he will be able to diagnose your noise. __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

04-25-2020, 10:47 PM	#3
Willys_MB Registered User Join Date: Apr 2017 Location: Boise, ID Posts: 856	Re: Speedometer noise You probably need to pull the cable and clean and lube it. Once I lubed mine I had no problems. I was having this exact same issue before I did that. I just sprayed the cable and housing down with brake cleaner until what was coming out turned clear and then coated the cable in white lithium grease. Some guys don’t like using white lithium grease and will have you go by speedometer cable. There are varying opinions about that, but I’ve never had a problem with white lithium grease __________________ 1968 GMC C2500 Long Bed Fleetside

04-25-2020, 11:11 PM	#4
Fbks_Cruiser Senior Member Join Date: Apr 2016 Location: Fairbanks, AK Posts: 343	Re: Speedometer noise Thanks guys. I too thought Tbone might have an idea. Pulling and lubing the cable might be any easy first step. It probably only has 4000 miles on it, but I can give that a try. I do have another instrument cluster I could maybe swap the speedometer from, but really don't want different mileage showing on the odometer. __________________ 1972 GMC K2500 Super Custom Matt

04-26-2020, 06:13 PM	#6
Astro-Balls Registered User Join Date: Feb 2019 Location: Nor Cal Posts: 822	Re: Speedometer noise Mine had the exact same symptoms, a Good cleaning of both the cable and the housing , using the correct lube solved it. __________________ 1968 C20 Fleetside 396 4sp PS PB AC CST . https://www.youtube.com/watch?v=RWK8GgWD4uA



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