Gearbox service

[sellxc70]

Originally Posted by ferg55

I would avoid using a garage that flushes the box with a machine (i.e under pressure) this has been known to cause harm to the valves etc.

You don't need to pressure-flush it anyway - the proper method (Volvo approved) is to disconnect the pipe from the intercooler and let the box pump the oil out of the torque converter and internals by itself (aka Gibbons method).

I would put the Gibbons method above the drain and fill option and flushing if you are not comfortable with going that route.

The flushing problems generally relate to machines that backflush the transmission. Forward flushing in the same direction as the oil flow seems to be a safer option. However this is a topic where data and results are difficult to come by.

The AWTF80SC seems to be a fairly robust transmission which should last with a periodic oil change.

Steve