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shifting issue

  1. Big shock on shifting, 1.8T Auto

    Can you tell me what's wrong? 2004.5(Mk IV) Jetta GLI, 1.8T, Automatic, 70K+ miles Suddenly, big shock for shifting up. But after restart the engine, it works just fine. This transmission was replaced at 49K miles for similar problem at VW dealer. It was fortunate that I still had a new car...