What is the serious jitter of Passat 1.8t automatic transmission?

Passat 1.8t transmission is the main hydraulic oil used in at transmission.

I think the first thing to consider is the oil problem, followed by the control valve.

The third is that the gearbox is seriously worn.

Solution: change the gearbox oil first (economic consideration)

If not, it is necessary to consider the gearbox itself.

I think if there is a second or third fault, you should consider the economic problem.

Passat 1.8t gearbox is easy to break down and age, so I don't think it is necessary to repair it.

Because the gearbox is badly worn

Repairs are expensive.

Consider replacing and disassembling the integral gearbox of vehicle components.

The best way

Change the oil frequently to save some use.

The engine emits black smoke.

It is incomplete combustion.

The train may not be new.

Simple solution

It is to clean the fuel injector and throttle regularly and replace the air filter.