Peterbilt 348 2017 - Dual Range (Two-Speed) Rear Axle

AXLE
DualRange(Two-Speed)
RearAxle
Yourvehiclemaybeequippedwitha
two-speedordualrangeaxle(option).
Youcanselecttworearaxleratiosfor
operatingunderheavyloadsorrough
terrainaswellasforovertheroad
hauling.
TheLowRangeprovidesmaximum
torqueforhaulingheavyloadsor
travelingoverroughterrain.TheHigh
Rangeisafasterratioforhighway
speedsandgeneralovertheroad
conditions.Aswitchontheaccessory
switchpanelcontrolstheDualRange
RearAxle.Youwillnoticethatthe
switchhasaguardtoprotectyoufrom
activatingitaccidentally.Alwayspark
yourvehiclewiththerangeselectorin
LOW.
DualRangeAxleOperation
ImportanttipsonoperatingaDual
RangeAxlewithInteraxleDifferential:
Shifttheaxlewiththeinter-axle
differentialintheunlockedposition
only.
Whenyouaredrivingwithpoor
traction,lockthedifferential.When
youhavethedifferentiallocked,drive
withtheaxleinLOWrangeonly.
Whenyouaredrivingonasurface
withgoodtraction,keeptheinteraxle
differentialunlocked.Youcandrive
withtheaxleintheLOWorHIGH
range.
AlwaysUNLOCKtheinter-axle
differentialbeforeshiftingtheaxle
speedrange.
CAUTION
Ifyoushifttheaxlerangewiththe
inter-axledifferentialinLOCK,you
couldseriouslydamagetheaxles.
Nevershifttheaxlerangewiththe
differentiallocked.
4-48Y53-6060-1C1(03/17)
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