SPEEDO READS HIGH ???
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Joined: Dec 2006
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From: ms. gulf coast
Car: 91 R/S , 89 dodge p/u
Engine: L31 GM crate re-cammed , 318
Transmission: T-5 , 4 speed auto
Axle/Gears: 3.42 , ?
SPEEDO READS HIGH ???
o.k. i just got back from a trip on thanksgiving week . 6-7 hr. drive each way on the interstate . my speedo seemed to show i was going much faster than i really was . ( camaro ran like like a dream ) anyway when minivans & FHP passed me when i showed 75mph i thought WTF . i felt that when i had to maintain 80+mph to keep up with traffic , & 95mph to pass others that it must be off . wondering if any of others have had the same problem ??? i feel it must be a bad VSS after a little search . can anyone confirm this ???
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Joined: Nov 2009
Posts: 1,255
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From: Lincoln, NE.
Car: '87 IROC
Engine: 5.7 Vortec w/ factory TPI
Transmission: WC T-5
Axle/Gears: 3.45 Posi
Re: SPEEDO READS HIGH ???
Stock tires and gears i presume. If so I could see the VSS being bad, but it could be a problem with the speedo its self.
Thread Starter
Supreme Member
iTrader: (1)
Joined: Dec 2006
Posts: 2,403
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From: ms. gulf coast
Car: 91 R/S , 89 dodge p/u
Engine: L31 GM crate re-cammed , 318
Transmission: T-5 , 4 speed auto
Axle/Gears: 3.42 , ?
Re: SPEEDO READS HIGH ???
yes on the tires & gears . seems to read high only at higher speeds . anyone else had this problem ???
Joined: Aug 1999
Posts: 19,282
Likes: 103
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: SPEEDO READS HIGH ???
Uncle, were you wearing your glasses? 
Sorry, nothing constructive to add.
JamesC
Sorry, nothing constructive to add. JamesC
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Joined: Jan 2007
Posts: 446
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Car: 87 Camaro
Engine: 305 LG4 (H)
Transmission: 700r4
Axle/Gears: 2.73
Re: SPEEDO READS HIGH ???
Nobody but you can confirm it. But here is how, if you have any friends with cars (you've got to have at least one) simply get on the expressway and have them set their cruise at 70 mph and see if your car matches the other cars speed at the same speedo reading.
Thread Starter
Supreme Member
iTrader: (1)
Joined: Dec 2006
Posts: 2,403
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From: ms. gulf coast
Car: 91 R/S , 89 dodge p/u
Engine: L31 GM crate re-cammed , 318
Transmission: T-5 , 4 speed auto
Axle/Gears: 3.42 , ?
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From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Speed Reading
If you have a scanner plug it in and drive at the speed the speedometer was misreporting.
If the scanner is within 2 MPH of the speedo replace the VSS BUFFER.
If the speedo and scanner disagree replace the speedo.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
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How bout those too scared to drive without headlights in the daytime
and the ones that need headlights for a little rain
.
If the scanner is within 2 MPH of the speedo replace the VSS BUFFER.
If the speedo and scanner disagree replace the speedo.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
How bout those too scared to drive without headlights in the daytime
and the ones that need headlights for a little rain.
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