General Model Information
Transmission Identification Tag
All transmissions are identified by the
model and serial number. This information
is stamped on the transmission
identification tag and affixed to the case.
NOTE
Do not remove or destroy the trans-
mission identification tag.
The blank spaces provided below are for
recording transmission identification data.
Have these reference numbers handy
when ordering replacement parts or
requesting service information:
Transmission
Model
Transmission Serial
Number
Nomenclature
Following is a nomenclature tree that
describes the multiple configurations of the
transmission model numbers:
1 PXD = PACCAR TX-18
PXDP = PACCAR TX-18 PRO
2 T
orque Capacity (XX × 100 +50 lb-ft)
3 Units for Torque [F = lb-ft; N = Nm]
4 Design Level
5 Forward Speeds
6 Gear Ratio Set
D = Double Over Drive
Calibration Options
This transmission's operating parameters
can be calibrated for the intended vehicle
application.
Some example calibrations are
• Standard – normal on-highway
driving that blends performance
and fuel economy
.
• Performance – tuned to get the
most performance from the engine
at all vehicle weights.
• Tanker – fast shifts for unbaffled
tankers do not disrupt the shifting
load.
NOTE
A new calibration can be selected at a
PACCAR
Powertrain distributor. Not all
calibration options are available with
all engine/transmission model combi-
nations.
SPECIFICATIONS - General Model Information
Y53-1349-1A1 (02/2022) 61
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