I recently dumped the 16184738 out of my truck. Most things are working OK, but the speedo is off a ridiculous amount. Letting the clutch out and idling in 1st gear puts the speedo over 100. If there was a mechanical connection, then the needle would be bent or broken off by now.

I've adjusted the ppm and can get the speed close to reality reading the data through Tunerpro, but it has zero effect on the gauge. Upping the correction to 220 or so gets about a 3x reading, going above that will kill the output and it stays at zero. Calculating gas mileage by the odometer reading makes me feel good, who wouldn't like 500 mpg, but it isn't realistic and the gauge needs to work.

My question is, can this be corrected in anyway, using a 1227727 and 8D, or am I in Dakota Digital territory here? The circuit may just be saturated.