Automatic shudders on some gear changes.

check replace engine and transmission mounts

Is it a full auto box or auto with manual selection. Full auto has only 1,2,D,R. If its full auto take it to a regular tyre/exhaust place and ask them to help.
The vw and audi auto gearboxes that also have selectable manual gears are only reliable when they have the correct clean oil in them.
The oil is special and expensive, and you must only use the oil from VW. If you havent changed the gearbox oil, get it done. Its much cheaper as a first step, compared to taking the gearbox apart to check for wear or damage.

You will see the bolts holding the alternator in place. In most cases no more than three to remove. Before starting the replacment disconnect battery.............hope this help and good luck.....Please rate this.

indicates a reverse servo/ solenoid problem
have the fault codes read by an accredited auto transmission specialist shop

Replace the Engine Coolant Temperature (ECT) sensor. ECT sensor is placed in the right back side of the cylinder head on 2002 VW Jetta 1.9 TDI. See picture below:



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test a new maf sensor , the signal to the gear shifting comes from tha maf sensor

water pump impeller grinding on housing from dead bearing they often dont last the timing belt intervall

how much fluid does the power steering system take

motor com dirty or brushes worn

I had the same problem with my T5 130. My mechanic replaced the head gasket to no avail,then we checked the oil filter,that was ok.then we went on to a web forum and found out that the AXD engine suffers from water pump failure.We took it off and it was corroded,the seal had failed and was pumping water into the block.My advice,CHECK WATER PUMP FIRST! Good luck Marc,Somerset.