Sppedometer/Odometer corrected - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tbruz · 04-14-2010, 10:33 PM

Found a company in Omaha, Service Express Co, that made a speed ratio adapter for my 1972 Blazer.

No need for gear ratio or tire size.
Went for a 40 to 50 mile ride and then called in my indicated mileage off the odometer and the actual miles traveled from a friends GPS. The company was able to make the adapter in two days for $65. Goes between Xfer case and speedo cable

The good news is I can trust the speedometer. Yahoo
The bad news is I can calculate my MPG. Ouch
Tbruz

Cap'n Hook · 04-16-2010, 09:29 AM

I used my GPS with the Jimmy and even with the 33x12.50's it was still less than 2 mph off at 60!

04-14-2010, 10:33 PM	#1
Tbruz Registered User Join Date: Feb 2010 Location: Windham, NH Posts: 226	Sppedometer/Odometer corrected Found a company in Omaha, Service Express Co, that made a speed ratio adapter for my 1972 Blazer. No need for gear ratio or tire size. Went for a 40 to 50 mile ride and then called in my indicated mileage off the odometer and the actual miles traveled from a friends GPS. The company was able to make the adapter in two days for $65. Goes between Xfer case and speedo cable The good news is I can trust the speedometer. Yahoo The bad news is I can calculate my MPG. Ouch Tbruz

04-16-2010, 09:29 AM	#2
Cap'n Hook Workin to live... Join Date: Jun 2003 Location: Texas Hill Country Posts: 261	Re: Sppedometer/Odometer corrected I used my GPS with the Jimmy and even with the 33x12.50's it was still less than 2 mph off at 60! __________________ Jason

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