In October 2007, Mitsubishi filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Drive force transmission unit, covering the MF61WE. The filing affects 82 vehicles manufactured between May 2003 and July 31, 2007.
Overview
| MLIT filing number | 1119620 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | October 30, 2007 |
| Manufacturer(s) | Mitsubishi |
| Component | Drive force transmission unit |
| Production period | May 2003 — July 31, 2007 |
| Vehicles affected | 82 units |
Filing in context
The Drive force transmission unit is the most frequently cited component category in this archive, appearing in 5 of its 4,890 filings. This filing is one of 86 Mitsubishi notifications from 2007 in this archive. For scale, 3,960 of the 4,890 filings in this archive report a larger number of affected vehicles; the vehicles involved here were manufactured over a span of about 4 years and 2 months.
Defect
In the travel motor reduction gear unit located within the rear wheel, improper support of the drive shaft causes wear of the rotary bush in the clutch hydraulic oil circuit and allows sealing performance to degrade at high temperatures. Continued use under these conditions may allow clutch hydraulic oil to flow into the reduction gear unit during high-speed travel, raising internal pressure and engaging both the low-speed and high-speed clutches simultaneously. This may cause the rear wheels to lock while driving.
Corrective action
On all vehicles, replace the travel motor reduction gear assembly with a corrected part. To prevent internal temperature rise, revise the maximum speed setting, install a temperature sensor on the reduction gear unit, and reprogram the control software to limit travel speed when elevated temperatures are detected. Because the corrected parts require additional procurement time, as an interim measure, notify users of operational precautions related to vehicle use.
Affected models & chassis ranges
This filing lists 2 type code(s). A vehicle is affected if its chassis number falls within one of the ranges below.
| Type code (型式) | Model | Chassis ranges |
|---|---|---|
| A4P | ＭＦ６１ＷＥ | A4P003801 — A4P003842 |
| SB-A4P | ＭＦ６１ＷＥ | A4P103843 — A4P103884; A4P106001 — A4P106006 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
後輪内の走行モータ減速機において、駆動軸の支持が不適切なため、クラッチ作動油の油圧回路のロータリブッシュが摩耗するとともに、高温時にシール性能が低下するものがある。そのため、そのままの状態で使用を続けると、高速走行時にクラッチ作動油が減速機内部に流入し内圧が上昇して、低速及び高速の両クラッチが接続状態となり、走行中に後輪がロックするおそれがある。
改善措置
全車両、走行モータ減速機アッセンブリを対策品に交換する。また、減速機内部の温度上昇を防止する為、最高速度を変更するとともに減速機に温度センサーを取付け温度上昇時に走行速度を抑制する制御プログラムに変更する。 なお、対策品の入手に時間を要する為、暫定措置として、使用者に対して使用方法に係る注意事項を周知する。
Source & verification
This entry reproduces public data from Japan's MLIT recall registry. English text is jdmvin.com's own translation; always verify against the official source:
https://renrakuda.mlit.go.jp/renrakuda/ris-detail-car.html?class=recalldatacar&id=3001713
Related recalls
Same manufacturer, same component
Other Mitsubishi filings involving the Drive force transmission unit, closest to this one by filing date.
Drive force transmission unit — affects 331 vehicles.
Open recall detail →Drive force transmission unit — affects 184 vehicles.
Open recall detail →Other recalls affecting the same models
Filings whose affected type codes overlap with this one, newest first.
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Open recall detail →Wheel lug nuts — affects 63 vehicles.
Open recall detail →All Mitsubishi recalls · All 2007 recalls · Recall Archive home