Introduction
This guide addresses the issue of an automatic transmission occasionally slipping in 3rd gear, particularly just after shifting into that gear. This issue can affect vehicles with automatic transmissions around the 145,000 km mark.
Problem
The automatic transmission slips intermittently when shifting into 3rd gear. The issue is not constant, occurring only a few times per day. The transmission fluid was recently serviced, but the slipping issue existed prior to the service. Visual inspection during the service showed no significant debris on the transmission pan magnet.
Possible Causes and Solutions
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Firmware Update: Check with a dealer to determine if a firmware update is available for the transmission. While a specific update may exist for 6-speed transmissions, it’s worth investigating whether a similar update applies to other transmissions.
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Valve Body/Solenoid Issue: Intermittent slipping can be caused by a malfunctioning valve or solenoid within the transmission. These components control fluid flow and gear selection. A faulty solenoid might not always operate correctly, leading to occasional slipping. If this is the case it will be substantially cheaper than an overhaul.
Note
If mechanical wear is the cause, an overhaul of the transmission or replacement with a second-hand unit may be necessary.
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