Peterbilt — Air Trac

Description

This air suspension has a maximum capacity rating of 46,000 pounds. It features lower radius rods that strengthen and stabilize the suspension but tend to cause a rougher ride quality than the Air Leaf or Low Mount Air Leaf.

Peterbilt AIR TRAC

Fast Facts

Peterbilt — Air Trac
Type	Air suspension with maximum capacity rating of 46,000 pounds.
Features	Lower radius rods that strengthen and stabilize the suspension.
Problem Areas	Torque rods / torque rod bushings. Spring roller.
ATRO Solutions	Transverse torque rod replacement. Lower torque rods replacement. Spring roller, or spring roller kit replacements.

Tech Tips and Additional Resources

ATRO’s transverse rod replacement (ATRO’s TR75-41059, OE# 03-04059):

Rebushable and rotating-pin for easy installation
Heavy-duty bushing (OE standard bushing has smaller O.D.)
If rebushing ATRO’s TR75-41059, use ATRO’s TS38000
If rebushing OE/aftermarket rods, use ATRO’s TS34000

ATRO’s torque rods for lower rod replacement:

Rebushable and a rotating-pin for easy installation
The lower rods come in two versions:
- 1. ATRO’s TR75-41119 is a direct OE replacement – both use the larger straddle bushing (TS38000)
- 2. ATRO’s TR75-41327 option is also a direct replacement to the OE offering. Note: the bushings within the same rod differ. The axle bracket end has a 3/4" bolt but the frame end has a 5/8" bolt. ATRO’s rod, TR75-41327, has a TS38000 in one end and a TS38750 in the other.

ATRO also offers the spring roller, SU75-29623, or the complete spring roller kit, SU75-29624. ATRO pricing on the kit includes the polyurethane and steel rollers plus the bolt, nut and washer.