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Old 10-07-2007, 11:40 AM   #1
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The story begins with a trip to Florida to pick up our 2008 Dolphin LX . Leaving the dealership on the Interstate I set the cruise on 70 mph. Soon everything on the road is flying by me. Next the computer shows I am averaging 11.5 mpg. I thought boy the new Allison is really something. With everything on the road still flying by, I ask my wife what speed the gps shows. Just ove 62 mph she replies. Then we check the odometer against the gps, the mileage is off by 10%. Returning to Texas I go to the Workhorse shop. It would take half a day to tell all of the attempts to reprogram working with both Workhorse and GM. After numerous downloads to update the programmers and the use of three different programmers it was decided to send the ecm to GM. No luck after two days of attempts to recalibrate. Turns out there is a glitch in the program that will not let them in to recalibrate the speedometer. The solution was to build a new computer with the correct tire size. Everything works fine now. They told me if you change tires, be absolutely sure you replace with EXACTLY the same diameter tire, as we cannot recalibrate. Another issue was the milage showing 10% excess. At 8000 actual miles I am showing 8800. I am sure Workhorse will be fair with me as they have done all they could do. This is something to think of if you are planning to change tires
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Old 10-07-2007, 11:40 AM   #2
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The story begins with a trip to Florida to pick up our 2008 Dolphin LX . Leaving the dealership on the Interstate I set the cruise on 70 mph. Soon everything on the road is flying by me. Next the computer shows I am averaging 11.5 mpg. I thought boy the new Allison is really something. With everything on the road still flying by, I ask my wife what speed the gps shows. Just ove 62 mph she replies. Then we check the odometer against the gps, the mileage is off by 10%. Returning to Texas I go to the Workhorse shop. It would take half a day to tell all of the attempts to reprogram working with both Workhorse and GM. After numerous downloads to update the programmers and the use of three different programmers it was decided to send the ecm to GM. No luck after two days of attempts to recalibrate. Turns out there is a glitch in the program that will not let them in to recalibrate the speedometer. The solution was to build a new computer with the correct tire size. Everything works fine now. They told me if you change tires, be absolutely sure you replace with EXACTLY the same diameter tire, as we cannot recalibrate. Another issue was the milage showing 10% excess. At 8000 actual miles I am showing 8800. I am sure Workhorse will be fair with me as they have done all they could do. This is something to think of if you are planning to change tires
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Old 10-07-2007, 04:50 PM   #3
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Great point on the tire size. I would be courious to know how the mix-up on computers occured, also I have a bad feeling you are not alone.

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