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Automann · Suspension & Steering
TRB8644
In stock · ships from Knoxville
This is a heavy-duty torque rod bushing (radius rod bushing) built for Chalmers rear suspension systems on trucks and trailers.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 3 applications
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All confirmed applications for this part number.
Other applications
Other applications
Common applications for Chalmers suspensions. Verify dimensions (ID 2.563 in, OD 4.25 in, Length 4.2 in) against your existing bushing before ordering.
Part data verified against 5 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It is installed in the ends of the torque rods to allow controlled pivoting while absorbing road vibration and the twisting forces from acceleration and braking. Over time the rubber degrades, causing loose or clunking axles; replacing it restores proper axle alignment and stable handling. If your Chalmers‑equipped vehicle shows excessive rear‑axle shimmy or uneven tire wear, this bushing is the likely fix.
Part Number: TRB8644
TORQUE ROD BUSHING CHAMLERS
Vendor: Automann
Dealer: KP Services Crossville
Compatibility, alternatives, and more
Parts commonly needed alongside suspension & steering
