RAM

21-025-15

Manufacturer communications

Publication date: 2015-04-18
Received by NHTSA: 2018-12-10
NHTSA record numbers: 10150543

Manufacturer summary

Original wording in English

Flash: 854RE Transmission Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customer may experience one or more of the following. ? Malfunction Indicator Lamp (MIL) illumination with Diagnostic Trouble Code (DTC) P0734 - Gear 4 Shift Incorrect Ratio set in the TCM memory. ? Bump sensation felt during engine start/stop transition on light throttle acceleration (Engine Stop Start (ESS) equipped vehicles only). ? Less than desired overall downshifts during normal driving. ? Less than desired downshifts during passing maneuvers. ? Less than desired upshift quality in lower gears.

NHTSA manufacturer communications ↗

Reported code forms

P0734

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

RamP0734

Gear 4 Shift Incorrect Ratio set in the TCM memory

NHTSA 10148955 · NHTSA 10150543

Check vehicle applicability

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Make	Model	Model year
Ram	1500	2015

Data coverage →