# Service bulletin SB46\-057

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.

- Type: Service bulletin
- NHTSA id: 10172280
- Published by NHTSA: 2020\-03\-07
- Manufacturer's number: SB46\-057
- Manufacturer's date: 2020\-03\-06
- NHTSA component: STEERING; SUSPENSION

## NHTSA's summary

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 document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10172280-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10172280-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Steering, Suspension

## Vehicles listed

- 2021 FREIGHTLINER CASCADIA

## Recalls for the same vehicles and component

- [2023083](/recalls/tc/2023083.md), 2023-02-20: Steering
- [2021545](/recalls/tc/2021545.md), 2021-09-02: Steering
- [21V689000](/recalls/nhtsa/21V689000.md), 2021-09-02: STEERING:LINKAGES:DRAG:LINK:CONNECTION
- [2021304](/recalls/tc/2021304.md), 2021-05-19: Steering
- [21V369000](/recalls/nhtsa/21V369000.md), 2021-05-19: STEERING:LINKAGES:TIE ROD ASSEMBLY
- [2021219](/recalls/tc/2021219.md), 2021-04-12: Steering
- [21V256000](/recalls/nhtsa/21V256000.md), 2021-04-12: STEERING:LINKAGES:TIE ROD ASSEMBLY; STEERING:CRITICAL FASTENERS
- [20V660000](/recalls/nhtsa/20V660000.md), 2020-10-27: SUSPENSION:REAR:AXLE:SPINDLE

## Other bulletins for the same vehicles and component

- [FleetCom\_Frnt Susp Bush](/bulletins/11029633.md), 2026-03-05, Other: SUSPENSION. Fleet Communications for composite front suspension bushing
- [FleetCom\_Pwr Steer Res](/bulletins/11027503.md), 2026-01-08, Other: STEERING. Fleet Communications for Power Steering Resevoir \- NTF Replacements
- [FleetCom\_Frnt Susp Spring](/bulletins/11027491.md), 2026-01-08, Other: SUSPENSION. Fleet Communications for Cascadia Front Suspension Spring Pin Bushings
- [FleetCom\_Bosch Steer Gear](/bulletins/11026420.md), 2025-12-05, Other: STEERING. Fleet communications for Bosch Steering Gear Replacements
- [CXA 10\_25\_Front Shock](/bulletins/11025096.md), 2025-11-06, Other: SUSPENSION. CX Advocate for 18k Front Suspension Shock Absorbers
- [SF721\-OWN LTR](/bulletins/11023686.md), 2025-10-03, Service campaign: SUSPENSION. Field Service Campaign for SF721 18k Front Suspension Shock Absorbers
- [SF721\-DLR LTR](/bulletins/11023685.md), 2025-10-03, Service campaign: SUSPENSION. Field Service Campaign for SF721 18k Front Suspension Shock Absorbers
- [SF721\-Bulletin](/bulletins/11023684.md), 2025-10-03, Service campaign: SUSPENSION. Field Service Campaign for SF721 18k Front Suspension Shock Absorbers
- [PB33\-004\-FTL](/bulletins/11020273.md), 2025-07-08, Service bulletin: STEERING. Parts Bulletin for Tie Rod Assembly Part Breakdown
- [CXA 3\_25\_SAS01T to SAS03T](/bulletins/11016310.md), 2025-04-02, Other: STEERING. CX Advocate for SAS01T to SAS03T replacement \(TSB54\-373\-FTL, TSB54\-097\-WST\)

JSON: [/v1/bulletins/10172280](/v1/bulletins/10172280)

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