# Service bulletin 21\-003\-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: 10148603
- Published by NHTSA: 2018\-11\-19
- Manufacturer's number: 21\-003\-15
- Manufacturer's date: 2015\-01\-24
- NHTSA component: ELECTRICAL SYSTEM; EQUIPMENT; POWER TRAIN

## NHTSA's summary

Flash: 8HP70 Transmission Shift Enhancements This bulletin involves reprogramming the Transmission Control Module \(TCM\) with the latest available software. A small number of customers may indicate that the transmission shift quality may not meet their expectations under the following conditions. These concerns are separated by vehicle. WK Vehicles ? ECO mode will not retain settings. If ECO mode is turned off, it will turn back on after the ignition is cycled. ? Less than desired upshift quality in normal drive mode under light/medium acceleration. ? Less than desired Power\-on downshift quality \(i.e. passing\). ? Less than desired powertrain performance while driving at higher altitudes, on steep grades, or during high speed driving. ? Less than desired tip in/out acceleration during torque converter clutch operation. ? Less than desired engagement quality in 4x4 high or 4x4 low range. WD Vehicles ? ECO mode will not retain settings. If ECO mode is turned off, it will turn back on after the ignition is cycled. ? Less than desired engagement quality in 4x4 high or 4x4 low range.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10148603-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10148603-0001.pdf)

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

## Components

Electrical system, Equipment and accessories, Transmission and driveline

## Vehicles listed

- 2014 DODGE DURANGO
- 2014 JEEP GRAND CHEROKEE

## Recalls for the same vehicles and component

- [18V332000](/recalls/nhtsa/18V332000.md), 2018-05-17: ELECTRICAL SYSTEM:SOFTWARE; VEHICLE SPEED CONTROL:CRUISE CONTROL; ELECTRICAL SYSTEM:WIRING
- [2017574](/recalls/tc/2017574.md), 2017-11-22: Electrical
- [17V741000](/recalls/nhtsa/17V741000.md), 2017-11-21: ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
- [2017341](/recalls/tc/2017341.md), 2017-07-10: Electrical
- [17V435000](/recalls/nhtsa/17V435000.md), 2017-07-10: ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
- [2016184](/recalls/tc/2016184.md), 2016-04-26: Powertrain
- [16V240000](/recalls/nhtsa/16V240000.md), 2016-04-25: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)
- [15V461000](/recalls/nhtsa/15V461000.md), 2015-07-23: EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.
- [2014448](/recalls/tc/2014448.md), 2014-10-09: Electrical
- [2014446](/recalls/tc/2014446.md), 2014-10-09: Electrical

## Other bulletins for the same vehicles and component

- [S1623000028 Rev. K](/bulletins/11033975.md), 2026-06-18, Service bulletin: ELECTRICAL SYSTEM; STRUCTURE:BODY. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
- [S1623000028 REV.I](/bulletins/11033308.md), 2026-06-03, Service bulletin: ELECTRICAL SYSTEM; STRUCTURE:BODY. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
- [S2623000023](/bulletins/11031337.md), 2026-04-15, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. Power Liftgate Inoperative.
- [S2223000022 REV.E](/bulletins/11031240.md), 2026-04-10, Service bulletin: ELECTRICAL SYSTEM. Power Liftgate Inoperative Or Intermittently Will Not Open Or Close.
- [S2608000015](/bulletins/11030266.md), 2026-03-25, Service bulletin: ELECTRICAL SYSTEM; SEATS. Memory Seat Does Not Work There Is No Response from The Seat While Pressing the Memory Seat Profiles from the Switch Diagnostic Trouble Code \(DTC\) B1D9B\-54\- Seat Horizontal Front Stop Not Learned\-Missing Calibration
- [S2621000003 REV.A](/bulletins/11030138.md), 2026-03-18, Service bulletin: POWER TRAIN. The vehicle will exhibit a service transmission/check engine warning indicator for the following transmission models: 845RE, 8HP45, 850RE, 8HP50, 8HP70, 8HP75, 8HP75\-PHEV, 8HP75\-LCV, 8HP90, 8HP95. Transmissions may exhibit the following diagnostic codes: P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.
- [S2608000010](/bulletins/11030042.md), 2026-03-13, Service bulletin: ELECTRICAL SYSTEM. Active Diagnostic Trouble Code \(DTC\) B1A10\-00, B1A11\-00, B1A12\- 00, B1A13\-00\-, B1A14\-00, B1A15\-00, B1A16\-00, and B1A17\-00 in The Radio Frequency Hub \(RFH\)
- [S1408000384 REV.J](/bulletins/11030035.md), 2026-03-13, Service bulletin: ELECTRICAL SYSTEM. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor \(IBS\) State of Charge \(SOC\) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes \(DTCs\), or Battery Warning Lamp On
- [110603](/bulletins/11030026.md), 2026-03-13, Service bulletin: ELECTRICAL SYSTEM. SPEAKER \- NONE
- [110604](/bulletins/11030025.md), 2026-03-13, Service bulletin: ELECTRICAL SYSTEM. SPEAKER \- NONE

JSON: [/v1/bulletins/10148603](/v1/bulletins/10148603)

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