Service Repair

Acura Jerky Upshifts Call for TCM Reprogram

Nov. 19, 2020

This bulletin applies to all 2016-2019 Acura MDX, 2020 MDX AWD and 2WD, 2015 TLX 2WD and AWD vehicles, equipped with a V6 and 9-speed automatic transmission. The transmission may exhibit harsh or jerky upshifts with steady acceleration.

Information courtesy of Mitchell 1

Mike Mavrigian

There are abnormal TCM adaptation values in the TCM software.

Update the software using i-HDS 1.006.004 or later, HDS 3.104.002 or later, or PC application version 1.2.1.1 or later.

Do not use the Mongoose PRO VCI for this service as it is not an American Honda-approved device.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

About the Author

Mike Mavrigian | Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.