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VW Golf 105bhp TDi - VW Golf automatic gearbox problem - steve in sidmouth
The exact symptoms are: when the car is about to change gear there is a whizzing sound as though the clutch is slipping (I know it doesn't have a clutch as such!) , then a thump as it jumps into gear. This happens both going up the gears and going down, mostly in the lower gears.

The car is a VW Golf SE TDi 105 bhp 1895cc diesel automatic year 2006

Changing the gearbox oil had had no effect on the problem.

VW Golf 105bhp TDi - VW Golf automatic gearbox problem - hardway

Did you change the filter at the same time?