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Service bulletins for the 2021 Freightliner Cascadia

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

509 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with component: Suspension are shown. Show all

Bulletins, newest first
FleetCom_Frnt Susp Bush2026-03-05. Other. SUSPENSION. Fleet Communications for composite front suspension bushing
FleetCom_Frnt Susp Spring2026-01-08. Other. SUSPENSION. Fleet Communications for Cascadia Front Suspension Spring Pin Bushings
CXA 10_25_Front Shock2025-11-06. Other. SUSPENSION. CX Advocate for 18k Front Suspension Shock Absorbers
SF721-OWN LTR2025-10-03. Service campaign. SUSPENSION. Field Service Campaign for SF721 18k Front Suspension Shock Absorbers
SF721-DLR LTR2025-10-03. Service campaign. SUSPENSION. Field Service Campaign for SF721 18k Front Suspension Shock Absorbers
SF721-Bulletin2025-10-03. Service campaign. SUSPENSION. Field Service Campaign for SF721 18k Front Suspension Shock Absorbers
SB32-0562022-03-03. Service bulletin. SUSPENSION. Freightliner Service Bulletin for Front Spring Eye Bushing Replacement
SS3083-FTL20212021-12-02. Service bulletin. SUSPENSION. Service Solution for Aero Height Control Interfering with RDF Alignment. The Aerodynamic Height Control feature on the New Cascadia is a feature that raises and lowers the air suspension with relation to vehicle speed in order to reduce drag and achieve better fuel efficiency. The Hadley Smart Valve (HSV) is the module that makes this possible by applying and exhausting air from the rear axle suspension as necessary.
FAB2862021-07-24. Service bulletin. SUSPENSION. Freightliner Action Bulletin FAB286 Cascadia Rear Suspension Ride Height
SS2083FTL20212021-07-22. Service bulletin. SUSPENSION. Service Solution for Aero Height Control Interfering with RDF Alignment and 42/523004/13 and 232/524042/9 Active for vehicles equipped with Hadley Smart Valve. The Aerodynamic Height Control feature on the New Cascadia is a feature that raises and lowers the air suspension with relation to vehicle speed in order to reduce drag and achieve better fuel efficiency. The Hadley Smart Valve (HSV) is the module that makes this possible by applying and exhausting air from the rear axle suspension as necessary.
SS10335232021-06-09. Service bulletin. SUSPENSION. Service Solution SS 1033523 Airliner Suspension Dump and Raise Functionality and Troubleshooting
TechTalk200692021-05-05. Service bulletin. ELECTRICAL SYSTEM; SUSPENSION. Tech Talk discussion on 2021 NEW CASCADIA SUSPENSION DUMP IS NOT RAISING THE SUSPENSION.
CALFTL42-0032021-03-31. Service bulletin. SUSPENSION; SERVICE BRAKES. Customer Advisory Letter for Inspection and Correction of the Clearance between the Drive Axle Disc Brake Chamber and the Airliner Leaf Spring.
TechTalk78112020-11-03. Service bulletin. SUSPENSION. Tech Talk discussion on Suspension Pressure Gauge.
CALFTL32-0082020-10-19. Service bulletin. SUSPENSION. Customer Advisory Letter for Drive Axle Leaf Spring Pin Hex Nut Torque Inspection. Select New Cascadia vehicles may have been delivered to customers with insufficient torque applied to the hex nuts at the front of the spring hanger.
SB32-0332020-03-31. Service bulletin. SUSPENSION. Freightliner Service Bulletin for Front Axle Spacer Replacement. This service bulletin replaces the version dated 05/01/2016. This bulletin is updated to include the parts list. Some vehicles may exhibit a lean (right or left) due to weight difference on the front suspension. While this does not affect the operation of the vehicle, it may be visually unpleasing to many customers. To correct this condition, replace the existing front axle spacer on the low side of the vehicle with a thicker one.
SB00-0382020-03-18. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; SUSPENSION. Freightliner Service Bulletin for vibration troubleshooting - finding the cause. This version replaces the version dated 5/1/14 and adds New Cascadia.
SB46-0572020-03-07. Service bulletin. STEERING; SUSPENSION. Service Bulletin for APS3 Steering Gear Calibration. Vehicles equipped with an APS3 steering gear require calibration when an axle alignment is performed. Calibration is also needed when servicing any steering or suspension components, frame extension bracket or wheels or tires.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.