# Service bulletin 21\-035\-15

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.

- Type: Service bulletin
- NHTSA id: 10148932
- Published by NHTSA: 2018\-11\-26
- Manufacturer's number: 21\-035\-15
- Manufacturer's date: 2015\-05\-27
- NHTSA component: POWER TRAIN

## NHTSA's summary

Flash: Transmission Shift Enhancements This bulletin involves selectively erasing and reprogramming the Transmission Control Module \(TCM\) with new software. The customer may experience one or more of the following: Grand Cherokee/Durango 3.6L Engine \(Sales Code ERB\) ? Erratic shifting complaints while driving up steep hills or towing during hot ambient temperature conditions. ? Transmission shifting does not meet customers expectation while towing a loaded trailer in high ambients \(\>32°C/90°F\). ? Poor performance and/or poor powertrain response when trying to accelerate from speeds \>58 kph \(36 mph\) \- All Markets. ? Poor performance and/or poor powertrain response when trying to accelerate from speeds \>48 kph \(30 mph\) \- Japan/Taiwan/China vehicles only. ? Transmission shifts inconsistently \(gear hunting\) when driving up/down steep hills or when towing a trailer. Grand Cherokee 6.4L Engine \(Sales Code ESG\) ? Poor acceleration or performance above 113 kph \(70 mph\). ? Transmission shifting while accelerating from a stop does not meet customers expectation. ? Harsh shifting during acceleration with moderate accelerator pedal and then lifting off the accelerator pedal. ? Cannot accelerate up a steep incline or with a loaded trailer in reverse. Wrangler 3.6L Engine \(Sales Code ERB\) ? Erratic shifting complaints while driving up steep hills or towing during hot ambient temperature conditions. ? Hanging in gear \(2nd Gear\) when driving up steep hill or Towing \(Rubicon ONLY\). ? Transmission shifting does not meet customers expectation while towing a loaded trailer in high ambients \(\>32°C/90°F\). ? Poor performance and/or poor powertrain response when trying to accelerate from speeds \>48 kph \(30 mph\) \- Japan/Taiwan/China vehicles only. ? Delayed Drive to Reverse shift engagement when the transfer case is in Low Range \(4LO\) \- Rubicon Only. Wrangler 2.8L Engine \(Sales Code ENS\) Erratic while driving in Low Range \(4LO\). Transmission shifts in

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10148932-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10148932-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Transmission and driveline

## Vehicles listed

- 2013 DODGE CHALLENGER
- 2013 DODGE DURANGO
- 2013 JEEP GRAND CHEROKEE
- 2013 JEEP WRANGLER

## Recalls for the same vehicles and component

- [13V234000](/recalls/nhtsa/13V234000.md), 2013-06-04: POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES; STEERING:HYDRAULIC POWER ASSIST:HOSE, PIPING, AND CONNECTIONS

## Other bulletins for the same vehicles and component

- [101232](/bulletins/11010205.md), 2024-11-07, Service bulletin: POWER TRAIN. Plate \- Planetary
- [1805114](/bulletins/10229881.md), 2023-01-17, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. Flash: J8 Mining Vehicle Speed Limiting This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) with new software. A small number of J8 Vehicles built as over\-the\-road units for non\-reg BUX markets and sold to US\-based mining operations with the intent of re\-programming the diesel PCM to limit vehicle\-speed in the mining environment. The discretion of which mining flash is to be used is left to the discretion of the operator.
- [2101414](/bulletins/10229859.md), 2023-01-17, Service bulletin: POWER TRAIN. Transmission Shift Enhancements
- [2101314](/bulletins/10229858.md), 2023-01-17, Service bulletin: POWER TRAIN. Transmission Oil Cooler Tube
- [2101014](/bulletins/10229855.md), 2023-01-17, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. Transmission Torque Management Enhancements While in Reverse
- [1802614](/bulletins/10229849.md), 2023-01-17, Service bulletin: POWER TRAIN. Powertrain System Improvements/Enhancements
- [2101314\-1](/bulletins/10229841.md), 2023-01-17, Service bulletin: POWER TRAIN. N28 Transmission Oil Cooler Tube Interim Repair
- [2103515](/bulletins/10229245.md), 2023-01-09, Service bulletin: POWER TRAIN. Flash: Transmission Shift Enhancements This bulletin involves selectively erasing and reprogramming the Transmission Control Module \(TCM\) with new software.
- [0801515](/bulletins/10229202.md), 2023-01-09, Service bulletin: STEERING; EXTERIOR LIGHTING; ELECTRICAL SYSTEM; POWER TRAIN. Flash: Gear Shift Indicator System Enhancements This bulletin involves reprogramming the Power Control Module \(PCM\) with new software. A small number of customers may experience improper gear shift point indications displayed in the EVIC if the paddle shift mode is selected on the steering wheel.
- [S1709000010](/bulletins/10229031.md), 2023-01-09, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Customer complaints may include abnormal engine noise, rough idle, lack of power, misfire. Upon investigation, it may be found that there is excessive camshaft lobe wear/lifter wear \(roller failure\) on one or more cam lobes and that camshaft/lifter replacement is necessary.

JSON: [/v1/bulletins/10148932](/v1/bulletins/10148932)

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