This is something I've been scouring the interwebs for a few days now. I'm getting ready and over at the TCCA forums that I belong, I modified the procedure a bit. I just wanted to know if you all had an 'at home/diy' procedure that maybe a little better?

0) add in 1/2 pint of SeaFoam Trans Tune to transmission fluid 30 mins before doing oil flush and follow instructions (drive around or go through gears) to work in Trans Tune properly.

1) Disconnect trans-line from transmission. Follow back the line from the Bottom of the Trans-Cooler on driver's side of radiator to find the 'return' line

2) Turn truck on and pump out old fluid through the return line. This will take a minute or two. Turn truck off when fluid starts 'crawling' out of line to prevent damage.

3) Pour in 4 quarts of new fluid and pump out the new fluid through the same disconnected hose. This will get any remaining fluid out of the Torque Converter.

4) Drop the Trans Oil Pan. Clean up magnet and pan itself with some brake cleaner

5) Replace new filter and gasket for Transmission pan. Make sure magnet is back in pan and bolt pan to transmission.

6) Add in 9.5 quarts and shift through all the gears.


By my calculations, I'll need roughly 9.5 quarts of oil for the full fill in step 8, along with the 'new' oil drain that step 3 calls out. So, roughly 14 quarts of oil. Does step 3 have enough oil going into the system to 'clean' out the old stuff?