DMF RW-1016, Parts & Service Manual

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DIVERSIFIED METAL FABRICATORS, INC. RW-1016
4-8 © 2017 DMF, Inc. All Rights Reserved.
4.2.4 Tire Pressure Monitoring Systems (TPMS)
The TREAD act has made TPMS mandatory on passenger vehicles under 10K GVWR. Some
models over 10k GVWR may also have factory TPMS systems installed. If the factory
wheels/tires are replaced as a part of the upfit, the TPMS system must continue to function on
the completed vehicle.
Wheel modification kits often use heavy duty tires that require substantially higher inflation
pressures than the factory wheel/tire combination. The TPMS system must be recalibrated to
work reliably with the higher required pressure ranges. This is normally done through the ECU
at a dealership. Please refer to the model specific information in Section 6.7, and provide this
information to the dealer when having TPMS recalibration work performed.
4.2.5 Speedometer Recalibration
Common work truck models are factory equipped with 16 or 17-inch rims and tires. The typical
19.5-inch rims and tires used in the wheel modification kits changes the rolling radius of the
tires significantly, requiring the speedometer to be recalibrated to accurately reflect speed and
mileage.
Dealerships are able to perform this work at a moderate cost. There are tools available to allow
an installer to perform the calibration but they are expensive and often model-specific.
Speedometer re-calibration is usually done at the same time as the TPMS re-calibration. See
Section 6.7 for information specific to your chassis.
FOR DETAILED PARTS
DIAGRAMS OF MODEL-SPECIFIC
WHEEL MODIFICATION KITS SEE
SECTION 6.7