Restore maximum structural tracking and eliminate costly trailer walk with the ATRO EQ47-35900 Premium Polyurethane Trailer Equalizer Bushing Kit. Proudly Made in the USA, this heavy-duty, commercial-grade service kit delivers a complete solution to replace worn, short-lived factory rubber bushings and hardware on rigorous vocational trailers and long-haul transport fleets.
The equalizer assembly is the heart of a tandem axle trailer suspension, constantly pivoting to distribute weight evenly across both axles. Standard rubber bushings quickly soften, twist, and breakdown under these severe multi-axis forces—especially when exposed to grease, road salts, and chemical contaminants. When the factory rubber fails, it causes rapid axle misalignment, catastrophic tire scrubbing, and structural suspension wear.
ATRO’s proprietary high-durometer polyurethane bushings absorb punishing suspension impacts without taking a permanent compression set or tearing. This comprehensive kit includes everything required to complete a professional, damage-free rebuild on one side of the vehicle, making it a critical component for maintaining a safe, true-tracking Fruehauf F Series or J2 Series trailer suspension network.
Premium Polyurethane Chemistry: Outlasts traditional rubber replacements by resisting dry rot, ozone cracking, grease saturation, and high-load crushing.
Complete Hardware Solution: Includes a high-strength 2" Outer Diameter (OD) equalizer bolt, locknut, and matching washers to guarantee a secure, slop-free installation.
Eliminates Trailer Walk: Tightens up center play within the equalizer pivot to maintain true rear axle tracking and significantly reduce rolling resistance.
Proudly Made in the USA: Manufactured from premium polyurethane in the United States to precise commercial tolerances for dependable, heavy-duty fleet reliability.
| Specification | Details |
|---|---|
| Manufacturer | ATRO Engineered Systems |
| ATRO Part Number | EQ47-35900 |
| Industry Cross Ref | 334-452A (Near Cross Complete Kit) |
| UPC Code | 751354027181 |
| Bushing Material | Heavy-Duty Polyurethane |
| Equalizer Bolt Outer Diameter (OD) | 2" |
| Equalizer Bolt Length | 11" |
| Country of Manufacture | United States (USA) |
| Category | Trailer Suspension Components |
| Quantity Per Vehicle | 2 Kits Required (1 Per Side) |
| Shipping Weight | 12.41 lbs |
(2) ATRO PL1085 Polyurethane Bushings
(1) Heavy-Duty Equalizer Bolt (2" OD x 11" Length)
(2) Structural Washers
(1) High-Strength Locknut
This premium polyurethane service kit is engineered to fit the following heavy-duty trailer suspension configurations:
Fruehauf Trailer Suspension: F Series and J2 Series Trailer Suspension Networks.
This premium polyurethane component kit serves as a high-performance cross-reference or interchange for the following OEM and aftermarket part numbers:
TRP Parts: TRK5384HD0 (Exact Direct Cross Match)
Gaff: GAFF13041 (Exact Direct Cross Match)
Dayton Parts: 334-452A (Near Cross Complete Kit)
Automann: TRK5384HD, TRK5384UB
Euclid / Meritor: E-9361, E-1024, R301024
Fruehauf: UXA-000004-900
Flagg: FR264
World America: WA12-5035
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