TSB 98158 — Ford Service bulletin
98158 is a service bulletin on file with NHTSA for 2 Ford models, 1991–1993 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. FRONT END SHIMMY MAY OCCUR AT VARIOUS DRIVING SPEEDS AND IS USUALLY INDUCED WHEN HITTING BUMPS, SUCH AS LARGE POTHOLES OR ROUGH RAILROAD CROSSINGS. SHIMMY IS NOT ALWAYS VERIFIED DURING ROAD TEST.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years 98158 names
| Vehicle | Model years |
|---|---|
| Ford F-250 | 1991, 1992, 1993 |
| Ford F-350 | 1991, 1992 |
Every document filed under 98158
| Document ID | Filed | Type |
|---|---|---|
| 98158 | August 3, 1998 | Service bulletin |
What 98158 covers
Suspension — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 98158?
98158 is a service bulletin filed with NHTSA by Ford, covering 2 Ford models across the 1991–1993 model years. NHTSA's summary reads: FRONT END SHIMMY MAY OCCUR AT VARIOUS DRIVING SPEEDS AND IS USUALLY INDUCED WHEN HITTING BUMPS, SUCH AS LARGE POTHOLES OR ROUGH RAILROAD CROSSINGS. SHIMMY IS NOT ALWAYS VERIFIED DURING ROAD TEST.
Which vehicles does 98158 cover?
NHTSA's file names Ford F-250 (1991–1993); Ford F-350 (1991–1992). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB 98158 a recall, and is the repair free?
No. 98158 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of 98158?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under 98158, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under 98158. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.