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Posted a while ago about the lurching problem with my cayenne. Got the car back from OPC yesterday and it is transformed. No lurching from 1st to 2nd, no delay in kickdown, no jolts, it has gone from one of the worst auto boxes I have ever driven to the best. I will see ho things go over the nex few hundred miles, but if the effect persists then I will try and find out the details of what was done from the OPC.