FasterTruck:

Hmmm, looks like a good idea.

I'd be interested too.

 

I know a bloke who has one of these set ups, full of praise for it , works well

 

This works by blocking the speed sensor's communication with the truck's computer, which essentially renders your speedometer useless. How are you going to explain that speeding ticket you just got? Is that worth losing your job? Also, another potential problem is if the odometer does not continue clicking over the miles it should. The truck computer will report a significant loss in the mpg department, and you are nuts if you don't think that will raise red flags at the company...possibly leaving you sitting at a shop until they figure out WHY the truck is getting such poor fuel mileage (or until you fess up, at which point you will be fired). Then there is the fuel tax issue. If the truck is not keeping track of miles accurately, mileage may not be reported to the states accurately, which if discovered could be used as evidence against the carrier (and you) when the government starts charging people with tax evasion.

Sure, it will let you drive faster...just like your truck isn't governed at all...but WHEN you are caught, good luck finding a job. If you don't think tampering with the truck in that manner will show up on your DAC in a way that will keep most other companies from even considering you, you are nuts.

If you want to drive the speed limit, don't work for companies that put you in 62 mph trucks. It really is that simple. You know what those companies are, and if not, ask what the trucks are set at. If you don't like what they tell you, thank them and tell them to call you when they turn 'em up to run the speed limit. You have a choice in who you drive for.....use it.

 

It's not about speeding. It's about passing.

But then again, you probably wouldn't know that.

 

It's all electronically controlled...meaning the speed sensor (on the transmission) sends an electronic signal to the ECU regarding how many rpm's the output shaft on the transmission is spinning. The rear gearing and tire size are factored in, and the ECU then sends an electronic signal up to the speedometer to give you a speed reading, and the odometer to give you a mileage reading.

This device works by intercepting the signal between the speed sensor and truck ECU, sending the signal to the ECU saying the truck is still operating below the governed speed. So, if your truck is governed at 62 mph and you have this device set to work at 60 mph, the speedometer will read 60 mph no matter how fast you are going, and the miles on the odometer will click over as though you are going 60 mph no matter how fast you are actually going.

The speed leads to the potential for speeding tickets. The odometer leads to your getting caught when the fuel mileage numbers don't add up, and also leads to the potential for fuel tax evasion charges if the company ever gets audited and they determine that you are the one that altered the truck to show less mileage than you actually traveled.

 

you can keep track of your speed with a gps

the odometer doesn't care whether you go 60 or 70 , the miles are the same

 

The odometer is based off of the same information sent to the ECU by the speed sensor....revolutions of the output shaft. Whereas the speed is determined by the rate of revolution the output shaft turns, the odometer uses the total number of revolutions. This device alters that signal by reporting a false number of revolutions of the output shaft, thereby altering all information derived from that information. There is no way for the device to give two separate speed sensor readings to the ECU in order to maintain an accurate odometer while at the same time altering the speed reading.

 

300.00 seems to be a bit much. I run 65 all the time, the truck will do 73. I only bump it up pass 65 when I come to some one running 64ish. I hate when JB Hunt and Swift do the snail races. 4 wheelers start passing on the shoulder. This would be the ideal time for it, pass and then turn it off. My odometer stopped working years ago. I track mpg and oil changes on paper with gps and google maps.