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Old 04-09-2001, 09:58 AM   #1
Scooby Specialist
Member#: 164
Join Date: Aug 1999
Location: Philly suburbs
2008 Exige S240

Post What makes a speedometer needle "shakey"

I've been wondering about this one for a while and never really bothered to look into it.
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Old 04-09-2001, 10:10 AM   #2
Scooby Specialist
Member#: 1853
Join Date: Jul 2000
Chapter/Region: TXIC
Location: SA-TX (Hozer expat)
GC6 Supercharged


One likely reason is the cable is a little gummed up. My old Camaro had a bouncy speedo needle. I took out the cable, squirted some "Squirl Piss" (WD-40) down it, no more problems.
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Old 04-09-2001, 10:33 AM   #3
RIP Sirkbac
Member#: 869
Join Date: Feb 2000
Chapter/Region: NESIC
Location: Nashua NH
1987 GPZ-750 TURBO
90' MX-5/11' DGM STi Sdn


there is no cable..

as far as I know..
our spedos are mere no more than a pulsing volt meter..

the ecu send electric pulses to it.. and that's how it works..

no idea why it'd bounce though.
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Old 04-09-2001, 10:37 AM   #4
FuJi K
Scooby Guru
Member#: 3687
Join Date: Jan 2001
Chapter/Region: MWSOC
Location: St. Paul, MN
MY99 GF4 JDM 6spd
NF Performance


you must have a racing flywheel..........no.......the fly wheel effects the RPM meter oopps!! my bad. i think you might need a new meter then or just spray some Prolonge super lubercants!!!

FuJi K
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Old 04-09-2001, 11:15 AM   #5
Scooby Specialist
Member#: 477
Join Date: Oct 1999
Location: Vancouver
GC4 -> GGA -> GM6
Yeah, that's about right.


I had a shaky speedometer on my '97 (cable speedo). A little grease and Teflon lube where the cable meets the meter fixed it right up.

It's a pain to disconnect the speedometer, though -- I wouldn't recommend it unless you're replacing light bulbs or something too.
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