# Service bulletin 05\-003\-18\-3460a

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: 10143976
- Published by NHTSA: 2018\-08\-20
- Manufacturer's number: 05\-003\-18\-3460a
- Manufacturer's date: 2018\-07\-10
- NHTSA component: POWER TRAIN:MANUAL TRANSMISSION

## NHTSA's summary

Some customers who drive at elevations higher than 3,300 ft \(1,000 m\) may complain of a shift shock felt when shifting into 3rd, 5th and/or Reverse with no AT related DTCs stored. The symptom can be temporarily repaired using the AT initial learning procedure, but may recur after multiple driving cycles. Applicable situations: Shifting up: 2\-3 or 4\-5 Shifting down: 4\-3 or 6\-5 NOTE: Shifting from 2\-3 or 4\-3 is more likely to be felt due to the gear ratio. Shifting into Reverse: D\-R, N\-R or P\-R Improper control logic of the TCM may cause improper learning of R\-3\-5 brake engaging speed when the vehicle is driven at high elevations. To correct this issue, the control logic of the TCM has been modified.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10143976-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10143976-0001.pdf)

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

## Components

Transmission and driveline, Manual transmission

## Vehicles listed

- 2018 MAZDA CX\-3
- 2017 to 2018 MAZDA MAZDA3
- 2017 MAZDA MAZDA6

## Other bulletins for the same vehicles and component

- [05\-001\-20\-3699](/bulletins/10176968.md), 2020-07-02, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION. Some customers may complain of a shift shock felt when shifting into 3rd, 5th and/or R range with no A/T related DTC stored. The symptom can be temporarily repaired by A/T initial learning procedure, but may recur after multiple driving cycles. Applicable situations: • Shifting up: 2\-3, \(4\-5\) • Shifting down: 4\-3, \(6\-5\) NOTE:\(4\-5\) and \(6\-5\) are felt more than others due to the gear ratio. • Shifting into R: D\-R, N\-R, P\-R. Improper control logic of the TCM may cause improper learning of R\-3\-5 brake engaging speed during certain driving situations. To correct this concern, the control logic of the TCM has been modified.

JSON: [/v1/bulletins/10143976](/v1/bulletins/10143976)

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