speedometer needle jumps by 5 mph back and forth!!!!!

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Feb 4, 2010 | 12:02 AM

palmerracing83

Thread Starter

Junior Member

Joined: Jan 2010

Posts: 16

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From: grand prairie texas

Car: 1983 z28 camaro

Engine: h.o. 305

Transmission: 700r4

Axle/Gears: posi

speedometer needle jumps by 5 mph back and forth!!!!!

1983 z28 camaro.
i have a factory gauge cluster with a 165 mph speedometer. as soon as the needle leaves zero it rises like it should but it bounces up and down with a range of about 5mph. what could it be and how do i fix it?

thanks

Feb 4, 2010 | 12:13 AM

Drew

Supreme Member

iTrader: (58)

Joined: Jul 1999

Posts: 20,310

Likes: 1,067

From: Salina, KS

Re: speedometer needle jumps by 5 mph back and forth!!!!!

Probably got a sticking speedo cable. You can probably just pull it out and lube it up as long as the sleeve isn't kinked, burned, or otherwise damaged.

Feb 4, 2010 | 01:58 AM

JamesC

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iTrader: (5)

Joined: Aug 1999

Posts: 19,282

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From: Lawrence, KS

Car: Met. Silver 85 IROC/Sold

Engine: 350 HO Deluxe (350ci/330hp)

Transmission: T-5 (Non-WC)

Axle/Gears: Limited Slip 3.23's

Re: speedometer needle jumps by 5 mph back and forth!!!!!

Quote:

Originally Posted by palmerracing83

as soon as the needle leaves zero it rises like it should but it bounces up and down with a range of about 5mph. what could it be and how do i fix it?

Here you go:

https://www.thirdgen.org/forums/inte...eedo-woes.html

JamesC

Feb 7, 2010 | 09:53 AM

Abubaca

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iTrader: (3)

Joined: Feb 2001

Posts: 8,494

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From: Sophia, NC

Car: 2016 Camaro SS + 1986 Z28

Re: speedometer needle jumps by 5 mph back and forth!!!!!

I didn't read JamesC's link, but I had the same problem with mine. I removed the whole cable and lubed it Graphite lube.

No problems since. cost a few bucks.

Feb 7, 2010 | 11:03 AM

novafirebirdguy

Senior Member

Joined: Mar 2009

Posts: 503

Likes: 1

From: Des Moines, IA

Car: 90 Formula WS6, 86 Sport Coupe

Engine: 305 TBI, 2.8 MPFI

Transmission: 700r4, 700r4w/vette servos

Axle/Gears: 2.73 Open, 3.42 Open

Re: speedometer needle jumps by 5 mph back and forth!!!!!

The 85 mph cluster in my sport coupe had the same problem I replaced the speedo cable but still did it. Turned out it was the actual speedo head itself. It's probably just the cable but the head might be bad as well.
Good luck
Alex