Kenworth — AirGlide 380/Peterbilt — Flex Air


Kenworth — AirGlide 380/Peterbilt — Flex Air

Description

This popular on-highway air suspension is easily identifiable and available on Kenworth and Peterbilt trucks. It features an aluminum beam with a C-shaped taper leaf spring in the front and an air spring behind the axle shackle.

Kenworth Airglide 380 — Peterbilt Flex Air

Fast Facts

Kenworth — AirGlide 380/Peterbilt — Flex Air
Type Aluminum beam with a C-shaped taper leaf spring in the front and an air spring behind the axle shackle
Features C-shaped spring link
Problem Areas All torque rods, especially the transverse torque rods
ATRO Solutions ATRO spring link bushings, ATRO Torque Rods, ATRO rebush for the OE torque rod with 1 7/8" eyes. See ATRO parts and details below.

 Tech Tips and Additional Resources

  • Kenworth brands this suspension as an AirGlide 380; on a Peterbilt this same suspension is named a FlexAir
  • Key identifying feature: the C-shaped spring link
  • ATRO offers replacements for the spring link bushings SU00-29001 (straddle) and the SU00-29002 (hollow mount)
  • The suspension contains six torque rods: two transverse, two lower front, two lower rear. The front rods (TR00-41001) are nearly an inch shorter than the rear rods (TR00-41600) and both front and rear rods have a straddle-hollow mount configuration. The two transverse rods (both are TR00-41009) have a straddle-straddle configuration.
  • All replacement torque rods on this suspension have the smaller 2" rod eye with ATRO’s TS00-22500 (straddle) and TH00-22500 (hollow). These bushings have outer sleeves, the pins rotate, and the rods are rebushable with ATRO bushings only.
  • To rebush the OE rod which has 1 7/8" rod eyes, use ATRO’s PL1146 (straddle, no rims, easy install) or TS50-22691 (straddle, retaining rims) and TH50-22692 (hollow). These bushings do not have rotating inner pin/sleeve.

 Wear Items

  • All torque rods, especially the transverse torque rods

 Key Parts

ATRO Spring Link Bushing SU00-29001
Spring Link Bushing

SU00-29001
SU00-29002

All Products
ATRO Torque Rod Bushing w/Retaining Rims TS50-22691
Torque Rod Bushing w/Retaining Rims

TS50-22691

All Products

Details

Kenworth AirGlide 380 / Peterbilt Flex Air suspension details
Kenworth AirGlide 380 / Peterbilt Flex Air

Suspension details showing spring link, and ATRO parts SU0029001 and SU00-29002.