240 transmission flush.

Canoe

Had a ganda at what the guy did to flush the tranny oil out of his auto. What i thought was interesting is that when my tranny oil is changed,all its flushing out is the oil from the pan and not the torque converter which obviously holds oil.

If i understand correctly,what he did was flush the torque converter as well. There are liters of fluid in that. When you run the engine and get the tran to pump fluid around,you therefore pump the old oil out of the torque converter as well.

A variation of what he did would be to dump the oil out of the pan first,then fill with new oil,then start car to pump the new oil in through the converter. Might save some oil that way.

Any thoughts?

http://volvo940se.wordpress.com/2014/07/26/flushing-volvo-940-transmission-fluid-change-to-fully-synthetic-atf/comment-page-1/#comment-39

Vee_Que

Don't bother changing to synthetic oil for a start. But I haven't read the link. Just giving my personal knowledge as a mechanic.

As someone who had built more than one Auto for these cars now. I can say the only way to ensure all oil is out is pull the box apart and send the torque converter off for inspection where they cut out open and clean it.

The best you can do is drain the oil then pull the pan off, change the filter, put it together. Then fill with about 5l of oil. Then start and check level is right. Then undo one of the cooler pipes with the car running and keep putting fresh oil in till the oil coming out of the cooler pipe is the right color. The torque converter will have fresher oil in it now but unless you have an aw70/71/72L box it isn't that important. Its easy to do this on a hoist. Painful and messy on the ground.

Vee_Que

Read article. Not doing the filter is the biggest issue there. You will use that much oil.