Audi Automatic Box 2.5 TDI

Hello, I am writing to see what you think, it is a Typtronic Change an A6 2.5 TDI of 2000, it is a quattro, the thing is in the diagnostic machine gives the DTC P0717 Turbine Tree speed sensor, but it has not seemed to see that sensor like that, if anyone knows where it is or had a manual for these gearboxes (they are zf).