Ford E-450 1996–1999 — technical service bulletin
Bulletin 6599 · NHTSA communication 610702 · issued Jul 1, 1999
Technical service bulletin
communication type
Power Train
component
1996–1999
model years
12
vehicle entries
Official summary
Some vehicles with model 80 rear axles only may exhibit a concern with the amount of sound, whine produced above 35 mph.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.