# Service bulletin B16\-044

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: 10100125
- Published by NHTSA: 2017\-05\-23
- Manufacturer's number: B16\-044
- Manufacturer's date: 2016\-11\-02
- NHTSA component: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION

## NHTSA's summary

SERVICE BULLETIN \- A JUDDER FROM THE TORQUE CONVERTER LOCK\-UP CLUTCH MAY BE FELT WHILE DRIVING BETWEEN 20 AND 60MPH. THE PROBLEM IS TYPICALLY DIAGNOSED AS A BAD TORQUE CONVERTER. AMERICAN HONDA INVESTIGATED THE JUDDER AND FOUND THAT THE TORQUE CONVERTER WAS NOT CAUSING THE JUDDER, RATHER, IT WAS CAUSED BY DETERIORATED TRANSMISSION FLUID. THE TRANSMISSION FLUID DETERIORATES QUICKER THAN EXPECTED WHEN IT IS EXPOSED TO INTERMITTENT HIGH HEAT LOADS UNDER SPECIFIC DRIVING CONDITIONS. AMERICAN HONDA IS WORKING ON A SOFTWARE UPDATE THAT WILL MAINTAIN THE TRANSMISSION FLUID TEMPERATURE WITHIN THE DESIRABLE RANGE UNDER ALL DRIVING CONDITIONS AND ELIMINATE THE POTENTIAL FOR THIS JUDDER. AMERICAN HONDA WILL REVISE THIS SERVICE BULLETIN WHEN THE SOFTWARE UPDATE IS AVAILABLE.

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Electrical system, Transmission and driveline, Automatic transmission, Software

## Vehicles listed

- 2012 to 2013 ACURA MDX

## Other bulletins for the same vehicles and component

- [B16\-062](/bulletins/10145420.md), 2018-10-15, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. Service bulletin \- A judder from the torque converter lock\-up clutch may be felt while driving between 20 and 60 mph. The problem is typically diagnosed as a bad torque converter. American Honda investigated the judder and found that the torque converter was not causing the judder and the transmission is not damaged by this judder.
- [B16\-063](/bulletins/10133008.md), 2018-04-16, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. Service bulletin \- After the software update, some vehicles based on how they are driven \(extreme conditions\) may still experience ATF deterioration after updating the PGM\-FI or A/T system and the shudder may return. The problem is typically diagnosed as a bad torque converter \(TC\). There is no damage to the TC, but because the ATF has deteriorated, it needs to be changed even though the ?ATF Service Due? message has not appeared.
- [BVE02142018901](/bulletins/10129342.md), 2018-02-26, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. Dealer message \- Every Service Bulletin requires you to take an HDS snap shot and use the job aid or Tech2Tech to confirm the judder/shudder is coming from the torque converter.
- [B16\-063](/bulletins/10108030.md), 2017-06-28, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER; EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE. "SERVICE BULLETIN \- AFTER THE SOFTWARE UPDATE, SOME VEHICLES BASED ON HOW THEY ARE DRIVEN \(EXTREME CONDITIONS\) MAY STILL EXPERIENCE ATF DETERIORATION AFTER UPDATING THE PGM\-FI OR A/T SYSTEM AND THE SHUDDER MAY RETURN. THE PROBLEM IS TYPICALLY DIAGNOSED AS A BAD TORQUE CONVERTER \(TC\). THERE IS NO DAMAGE TO THE TC, BUT BECAUSE THE ATF HAS DETERIORATED, IT NEEDS TO BE CHANGED EVEN THOUGH THE “ATF SERVICE DUE” MESSAGE HAS NOT APPEARED. MAKE SURE THE VEHICLE IS UPDATED BY REFERRING TO THE INSPECTION PROCEDURE."
- [B16\-062](/bulletins/10108029.md), 2017-06-28, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. "SERVICE BULLETIN \- A JUDDER FROM THE TORQUE CONVERTER LOCK\-UP CLUTCH MAY BE FELT WHILE DRIVING BETWEEN 20 AND 60 MPH. THE PROBLEM IS TYPICALLY DIAGNOSED AS A BAD TORQUE CONVERTER. AMERICAN HONDA INVESTIGATED THE JUDDER AND FOUND THAT THE TORQUE CONVERTER WAS NOT CAUSING THE JUDDER AND THE TRANSMISSION IS NOT DAMAGED BY THIS JUDDER."
- [B16044](/bulletins/10085026.md), 2016-11-29, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. SERVICE BULLETIN \- A JUDDER FROM THE TORQUE CONVERTER LOCK\-UP CLUTCH MAY BE FELT WHILE DRIVING BETWEEN 20 AND 60MPH. THE PROBLEM IS TYPICALLY DIAGNOSED AS A BAD TORQUE CONVERTER. AMERICAN HONDA INVESTIGATED THE JUDDER AND FOUND THAT THE TORQUE CONVERTER WAS NOT CAUSING THE JUDDER; RATHER, IT WAS CAUSED BY DETERIORATED TRANSMISSION FLUID.
- [ASN: 1305](/bulletins/10052433.md), 2013-07-27, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); TIRES; SERVICE BRAKES, HYDRAULIC; ENGINE; WHEELS. ACURA: SERVICE NEWS. ENGINE SHUTS OFF, POWER ON, BUT IN ACCESSORY; NEVER USE CONVENTIONAL WHEEL \& TIRE ASSEMBLIES ON PAX VEHICLES; MIL ON AFTER THROTTLE BODY CLEANING OR REPLACEMENT; S/M FIX BRAKE SYSTEM BLEEDING. VARIOUS MODELS AND MODEL YEARS. \*PE

JSON: [/v1/bulletins/10100125](/v1/bulletins/10100125)

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