I just bought an 04 TDI yesterday and the former owner said that they the trans was going bad. It came with all of the service records for the 5 years. The owner said he had a friend look at and said there were some codes in the memory and he reset them and the trans shifted fine for about 8 weeks and it started shifting erratic again. My first thought was the valve body going bad but my son has VAGCOM and he scanned it. It came up with a code that said "transmission speed sensor faulty". Can that cause erratic shifts if it is not sending the right signal to the ECM? Any thoughts?