CERTAIN AIR BRAKE ANTI-LOCK MODULATORS COULD MALFUNCTION DURING OPERATION OF THE ANTI-LOCK SYSTEM. A NYLON PISTON WITHIN THE MODULATOR AIR VALVE SYSTEM CAN SWELL FROM EXPOSURE TO SYSTEM CONTAMINANTS. CONTINUED EXPOSURE MAY CAUSE THE PISTON TO SWELL TO THE EXTENT THAT INTERFERENCE WITH THE CYLINDER WALL WILL RESULT, CAUSING MOMENTARY STICKING OR A PERMANENT JAM. THIS CAN RESULT IN TEMPORARY OR PERMANENT LOSS OF BRAKING FOR THE AFFECTED AXLE.
Remedy: THE PISTONS IN THE VALVE PORTION OF THE MODULATORS WILL BE REPLACED WITH PISTONS THAT DO NOT SWELL WHEN EXPOSED TO AIR BRAKE SYSTEM CONTAMINANTS.
Reported: 1983-03-22 (March 22, 1983) · Model years: 1982
SOME OF THE INVOLVED VEHICLES MAY HAVE BEEN BUILT WITH LEFT REAR BRAKE ASSEMBLIES THAT WERE INCORRECTLY PRODUCED AND MAY HAVE ONE OR TWO AUTOMATIC BRAKE ADJUSTERS THAT WERE INTENDED FOR RIGHT REAR BRAKE ASSEMBLIES. THE ADJUSTER WORKS BACKWARDS AND INCREASES THE CLEARANCE BETWEEN THE BRAKE LINING AND DRUM, INSTEAD OF MAINTAINING IT.
Remedy: DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE LEFT REAR BRAKE ADJUSTER ASSEMBLY AT NO CHARGE.
Inspect model-year patterns, reported mileage, monthly activity and the evidence behind each signal.
Data completeness
3 unique complaints in this selection. Analysis snapshot: 2026-09-30.
0.0%Usable mileage0 / 3 records
66.7%Valid incident date2 / 3 records
100.0%Valid filing date3 / 3 records
66.7%Ordered incident and filing dates2 / 3 records
Missing, zero and invalid mileage is excluded. Dates after the snapshot are excluded. Examples are limited selections, not a representative sample.
Problems by model year
Model-wide comparison of the eight most reported components across the model. Cells show counts and shares within each model year. Open a cell for source examples.
Component complaint heatmap
Component
1995
1997
1999
Service Brakes, Air:Supply:Compressor
1100.0%ODI 980922
RECURRING FAILURES OF AIR COMPRESSORS, RESULTING IN COMPLETE BRAKE FAILURE AND DIESEL FUEL LEAKAGE. ALSO, INTERFERENCE W/SHIFTING BECOMING IMOVABLE.
PE00 040; CONSUMER WAS TRAVELING ABOUT 65MPH ON THE HIGHWAY AND HEARED A NOISE. NOISE WAS FROM TIRE TREAD HITTING UP AGAINST VEHICLE. HE WAS ABLE TO PULL OVER, AND SAW THAT RIGHT REAR TIRE TREAD HAD SEPARATED. ALSO, LEFT FRONT AND BOTH REAR TIRES TREAD HAD SEPARATED. FIRESTONE STEELTEX RADIAL,#AT235/85R16, DOT # VNOR1XK. *AK
Darker cells indicate a larger share of submitted complaints. Components overlap. This measures complaint composition, not failure probability.
Failure mileage by component
Median and middle 50% of usable owner-reported mileages. Ranges require at least five records.
Component failure mileage distribution
Component
Mileage range (25th–75th percentile)
Median
Usable records
Examples
No usable records for this analysis.
Complaint and recall timeline
Explore monthly filing activity alongside recall announcements. Up to ten years of monthly history is available.
Solid line: filed complaints. Dashed amber lines: recall announcement dates for this vehicle selection; markers include all recall components. The latest month is partial. Temporal proximity does not establish causation.
Monthly counts, recall campaigns and complaint examples
Monthly complaint and recall timeline
Month
Complaints
Campaigns announced
Examples
2024-10
0
None
No examples available for this selection.
2024-11
0
None
No examples available for this selection.
2024-12
0
None
No examples available for this selection.
2025-01
0
None
No examples available for this selection.
2025-02
0
None
No examples available for this selection.
2025-03
0
None
No examples available for this selection.
2025-04
0
None
No examples available for this selection.
2025-05
0
None
No examples available for this selection.
2025-06
0
None
No examples available for this selection.
2025-07
0
None
No examples available for this selection.
2025-08
0
None
No examples available for this selection.
2025-09
0
None
No examples available for this selection.
2025-10
0
None
No examples available for this selection.
2025-11
0
None
No examples available for this selection.
2025-12
0
None
No examples available for this selection.
2026-01
0
None
No examples available for this selection.
2026-02
0
None
No examples available for this selection.
2026-03
0
None
No examples available for this selection.
2026-04
0
None
No examples available for this selection.
2026-05
0
None
No examples available for this selection.
2026-06
0
None
No examples available for this selection.
2026-07
0
None
No examples available for this selection.
2026-08
0
None
No examples available for this selection.
2026-09 (partial)
0
None
No examples available for this selection.
Emerging complaint spikes
Complete months in the latest six months with at least 10 complaints, at least twice the preceding 12-month average, and at least three square-root deviations above that average.
This is a descriptive screening rule, not a statistical defect finding. Publicity and reporting changes can increase submissions.
No complete months meet the spike thresholds for this selection.
Equal-age model-year comparison
Model-wide cumulative reports during the first three or five calendar years, starting with the model year (age 0). Only fully elapsed windows are compared.
1997: 0 complaints · 1999: 1 complaints
Equal observation windows
Model year
Through age 0
Through age 1
Through age 2
1997
0
0
0
1999
1
1
1
Date coverage across each selected cohort
Date basis for all complaints in selected model years
Year
Incident dates used
Filing date fallbacks
Excluded dates
1997
1
0
0
1999
1
0
0
Incident date is preferred when valid and no later than filing; otherwise filing date is used. Model year approximates age. Equal observation time does not adjust for sales, distance driven or reporting delays. One complaint linked to multiple model years can appear in each cohort.
Components reported together
Each cell counts unique complaints naming both components. Open a nonzero cell for examples.
Component co-occurrence matrix
Component
Service Brakes, Air:Supply:Compressor
Tires:Tread/Belt
Unknown Or Other
Visibility:Rearview Mirrors/Devices
Service Brakes, Air:Supply:Compressor
—
0
0
0
Tires:Tread/Belt
0
—
0
0
Unknown Or Other
0
0
—
1ODI 844552
ENTERTAINMENT CABINET FELL AND BROKE APART, AND MIRROR ARMS MOVE WHILE DRIVING. DEALER CONTACTED AND REPAIRWORK DONE. PROVIDE FURTHER INFORMATION. *AK