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Old 08-11-2008, 01:32 AM
Mark DiSilvestro Mark DiSilvestro is offline
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Join Date: Jan 2001
Location: Alexandria, Virginia
Posts: 5,480
Quote:
Originally Posted by rcounts View Post
Ditto on the speedo and odo being off by different amounts.

My speedo reads about 5% HIGH (GPS says I'm going 60 - speedo says 63)
My odo reads about 4% low (GPS says I drove 81 miles - odo says 77.7)

How do you compensate for that? If I were to change tire diameter OR rear gearing to make one of them more accurate, the other one would then be even farther "off"...
If the low odometer reading isn't caused by a slipping gear (very common) first try to check/repair whatever is causing the odometer error. Once the odometer is fixed, the speedometer needle/spring can perhaps be adjusted to bring that closer to accurate.

Happy Motoring, Mark
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