Peterbilt 389

PETERBILT ON-HIGHWAY MODEL 389

So you want to know what makes up the 389? Read the full truck specifications, including fuel exhaust, axles, lighting and aerodynamics.

Powertrain, Drivetrain & Exhaust

Engine

  • PACCAR MX-13
  • Cummins ISX15

Transmission

  • Fuller Manual
  • Fuller Automated

Exhaust

Vertical Single / Dual

Exhaust Guards

Vertical Stainless Steel

Hood, Bumper, Wheels, Tires & Fuel / Def Tanks

HOOD

  • 131" BBC

Bumper

Steel Painted Tapered / Logger
Aluminum Deep Taper
Stainless Clad Aluminum Deep Taper
Steel Chromed Tapered / Texas Style

Wheels

Aluminum 22.5" / 24.5"
Steel 22.5" / 24.5"

Tires

  • Bridgestone
  • Goodyear
  • Michelin

Fuel Tanks

23" Aluminum 50-120 gallon
26" Aluminum 50-150 gallon

Cab & Sleeper

Cab

  • Aluminum

Sleeper

Low Roof 44" / 58" / 72"
UltraCab 58" / 72" / 78"

Seats

  • Peterbilt UltraRide
  • Peterbilt Premium UltraRide
  • Sears Atlas

Battery Box

  • Aluminum

Tool Box

  • Aluminum

Frames, Axles & Suspensions

Frame

Steel 10-5/8" / 10-3/4" / 11-5/8"

5TH Wheels

  • Holland
  • Jost

FRONT AXLES

Dana Spicer 12-22K lbs.
Meritor 12-14.6K lbs.
Wide Track Available  

Front Springs

Taper Leaf 12-23K lbs.
Air Leaf 13.2K lbs.

Front Hubs

  • Iron
  • Aluminum LMS

REAR AXLES

Dana Spicer Single – 21-30K lbs.
  Tandem – 40-52K lbs.
  Tridem – 69K lbs.
Meritor Single – 21-23K lbs.
  Tandem – 40-46K lbs.
  Tridem – 66K lbs.

REAR SUSPENSIONS

Peterbilt Air Leaf
  FLEX® Air
  Low Air Leaf
  Low Low Air Leaf
  QuadraFlex
  AirTrac
Reyco 79KB
  102AR
  Multi-Leaf
Hendrickson RT
  Haulmaax
  HN 522
Chalmers 854
Neway AD 378

REAR HUBS

  • Iron
  • Aluminum LMS

Front Brakes

Air Disc  
Air Cam Drum 15" X 4" / 16.5" X 5" /
16.5" X 6" / 16.5" X 7"

Rear Brakes

Air Disc  
Air Cam Drum 16.5" X 7" / 16.5" X 8.6"

ABS SYSTEM

Bendix 4S4M
  6S4M
  6S6M

Other

Rear Mud Flap Hangers

  • Painted
  • Stainless Steel

Quarter Fenders

  • Black Molded
  • Stainless Steel

Deck Plate Access

  • Left
  • Right
  • Both

Batteries

  • PACCAR
  • Optima

Air Cleaners (Single or Dual)

Painted Cowl Mounted 13" / 15"
Stainless Steel Cowl
Mounted
13" / 15"

Air Dryers

  • Bendix

Air Tanks

  • Aluminum
  • Steel

Chassis Hose

  • Nylon
  • Wire Braid

Air & Electric Mounting

  • Back of Cab
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Signature Peterbilt Grille