Automatic transmission may not shift when cold on Suzuki Grand Vitara

Problem Description and Possible Solution

The automatic transmission may not shift when cold due to debris on the output speed sensor. There is a revised output speed sensor and software update available which should correct this concern.

Problem Data
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Average mileage: 120,000 (120,000–120,000)
Drive Train affected: Automatic Transmission
2 model years affected: 2006, 2011
2 people reported this problem
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Will not shift correctly into reverse, and now it will not shift into 2 easily. the rpm will hit 4000 and it still will not shift