speed ohmeter is fast
99 Fleetwood tioga ford E350, V10. Is it normal for the speed/o to read fast on motor homes. Ours compared to the GPS reads 5 MPH fast. At 70 MPH the GPS says 65MPH. The GPS is accurate, have had it f...
Forum Discussion
Matt_Colie wrote:
Nobody's speedo is right on, you have to look. Is the error constant or linear. Meaning is the error always 5 or is it half of what you see at 70 when you are at 35??
The constant error can be fix as above, more the pointer on the shaft. If it is linear, then call a Ford dealer. Manufactures often have different speedo pickup gears for this. When they build a transmission they don't know what the final drive will be and the driveline people don't know what tires will be on the assembled vehicle.
Matt
The faster you go, the greater the difference,
