Service bulletin 21-019-15

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10144869
Published by NHTSA	2018-09-24
Manufacturer's number	21-019-15
Manufacturer's date	2015-03-31
NHTSA component	POWER TRAIN

NHTSA's summary

Flash: Transmission Shift 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. ? Less than desired upshift performance during Wide Open Throttle (WOT) accelerations. ? Less than desired overall downshift performance during coasting deceleration, braking, or while passing. ? Less than desired transmission performance during Multiple Displacement System (MDS) mode transitions. ? Less than desired light or medium throttle shift performance. In addition to the above conditions, this software release also enables the capability to capture Electronic Control Unit (ECU) data through the Uconnect Data Recording system.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
DODGE CHALLENGER	2015

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
S2621000003 REV.A	2026-03-18. Service bulletin. 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.
2103014	2023-01-17. Service bulletin. Transmission Quick Learn Procedure
W56	2023-01-09. Service bulletin. Customer Satisfaction Notification W56 Reprogram Powertrain Control Module
9003704	2023-01-09. Service bulletin. Transmission Oil Pan, Heater (TMU), Tube or O-ring Applies to vehicles equipped with 8 speed transmissions only; if you have a leak that appears to be at the pan the use of proper leak detection is recommended. The fluid in the 8 speeds can be detected with a black light and there are aftermarket spray on leak detection materials to help ensure that the leak is properly diagnosed and not from another location such as cooler lines, heater tubes, or case porosity. Please note that the transmission pan gasket is available for many of the 8 speed applications FCA offers. Please review the available quick connect and transfer tube parts, as replacement of the TMU may not be required. If a TOC line connection is found to be the source, the quick connect may need replacement. If the leak source is coming from the connection of the TMU to the transmission, the transfer tube may need replacement. When parts are returned to the QEC the retaining clips (snap ring) for the quick disconnect fittings are missing. (This leaves a question as to whether the clips were missing from the assembly plant, or the technician removed them in order to make line removal easier.) Please return the clips with the transmission heater and note if they were not there to begin with. For any questions regarding transmission heater, contact FCA Redacted Content. If no response in 15 minutes, proceed with repair.
1801615	2023-01-09. Service bulletin. Flash: 6.2L Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) Illumination. Upon further investigation, the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) stored in the PCM memory. ? P0300 - Multiple Cylinder Misfire (manual transmission applications only). ? P1613 - Turbocharger/Supercharger Boost Pressure Sensor/Mass Air Flow Sensor Correlation. ? P2227 - Barometric Pressure Circuit Performance In addition, customers may also comment that, with the cluster set on metric units, they are unable to accurately increase or decrease the cruise control set speed using the resume or set buttons. Instead of changing vehicle speed by 1 KPH when pressing the buttons, the vehicle speed will increase approximately 1.6 KPH.
1900115	2023-01-09. Service bulletin. Loss Of Power Steering Assist This bulletin involves inspecting the steering gear pinion cover retaining washer and if not present, replacing the steering gear. Pinion Shaft Cover Retaining Washer Missing. The customer may describe loss of power steering assist.
2100915	2023-01-09. Service bulletin. Flash: Transmission Shift 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 concerns. These concerns are broken up per engine and transmission combination. 6.2L engine (sales code ESD) equipped with an 8HP90 transmission (sales code DFE) ? Transmission will not upshift during Wide Open Throttle (WOT) acceleration. ? Harsh or inconsistent coasting downshifts. ? Transmission will not shift into 7th gear during high speed driving. ? Inconsistent or busy shifts during stop and go traffic. ? Inconsistent gear shift patterns when driving on grades. ? Malfunction Indicator Lamp (MIL) Illumination during ABS activated stops with Diagnostic Trouble Code (DTC) P1DCD TCM Monitoring Processor Performance, Multiple Clutches Locked Up. 6.4L engine (sales code ESG) and equipped with an 8HP70 transmission (sales code DFK) ? Harsh or inconsistent 1-2 upshift. ? Harsh of inconsistent coasting 4-3 downshift. ? Harsh or inconsistent gear engagement when shifting to drive or reverse. ? Instrument Panel Cluster (IPC) shows the incorrect gear when in manual mode. ? Harsh of inconsistent shifts during tip-in acceleration from closed throttle. ? Inconsistent gear shift patterns when driving on grades. ? Inconsistent release of Hill Start Assist during tip-in acceleration. ? Transmission upshifts on sweeping curves under track driving conditions.
2102016	2022-12-19. Service bulletin. Manual Transmission Shifter Noise This bulletin involves greasing or replacing the manual transmission rear shifter bushing. Customers may experience a clunk, squeak, or similar noise heard from center console area while shifting.
V51	2022-12-19. Service bulletin. Customer Satisfaction Notification V51 Reprogram Powertrain Control Module
9003704	2022-10-31. Service bulletin. Trans Oil Pan, Heater Tube or O-ring, Heater Applies to vehicles equipped with 8 speed transmissions only; If you have a leak that appears to be at the pan the use of proper leak detection is recommended. The fluid in the 8 speeds can be detected with a black light and there are aftermarket spray on leak detection materials to help ensure that the leak is properly diagnosed and not from another location such as cooler lines, heater tubes, or case porosity. If you have a leak concern please note that the transmission pan gasket is available for many of the 8 speed applications FCA offers. See your parts specialist for the proper gasket for the repair.