I am swapping out the good old 4l60e with a new unit that has Amsoil in it, the torque converter has it as well. My old tranny/converter has regular fluid in it, both are coming out.

I am concerned with fluid that may be left over in the trans cooler mixing in with the Amsoil in the new tranny/converter which I think will not be a good thing.

How do I make sure all the old fluid is out.

Thanks

 

There is a can of tranny flush that is pressurized. Just spray it through the lines without the tranny connected. Spray until the can is completely empty (as per instructions on the can).

Hal

 

thanks Hal I'll look into that

 

I would first lightly blow some compressed air into the feed line to move the majority of the old fluid out. Then buy 2 cans of the Tranny Flush. Run the first can through the cooler backwards, then the 2nd one through the feed tube. This should have you covered.

 

 

Thanks guys for your replies