Transmission Fluid Change - Automatic

[paulfoel]

Is this right that you have to change it twice in effect?

 

Because 1st time its only possible to get half out then run the car and change again?

 

Do garages do this (or even know)? Or not bother?

[BrianH]

Even changing it twice doesn't do the whole lot - If its been allowed to get to a point where its closer to Tar than oil then twice would be the minimum required to get somewhere close to reasonable. Though if its already that bad it may be too late.

 

Because of the design of the torque convertor its impossible to empty it without pumping new fluid into it - a specialist setup where you can pump new fluid in would have more success at this, but provided you change it before it gets too bad it shouldn't be a problem.

 

Of course where that doesn't work out is when people only do something about it when it stops working properly - When it can be much worse to try and fix.

 

Does vary depending on the transmission in use though as well- Some are better than others for reliability, some keep the fluid in better condition for much longer than others (generally as they cool it more effectively though not always the case)

[gregers]

have heard/read that some will use a thin flushing fluid,to really give it a good go at cleaning out the crud.

[BrianH]

have heard/read that some will use a thin flushing fluid,to really give it a good go at cleaning out the crud.

 

yep, or Diesel if your doing it on the cheap!