Service bulletins for the 2015 Ram 1500
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.
590 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Torque converter are shown. Show all
| 21-014-15 | 2018-09-24. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. Flash: 8HP70 Transmission Shift Quality And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software A small number of customers may experience one or more of the following conditions. ? Bump sensation during tip-in acceleration between 5-10 mph (8-16 kph). ? Less than desired transmission performance during Torque Converter Clutch (TCC) lockup. ? Less than desired transmission performance in Tow/Haul mode. ? Less than desired transmission performance during coast down deceleration at higher altitudes. ? Bump sensation during 6-5 downshift. ? Bump sensation during 1-2 upshift. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.