For those with experience draining ATF through a cooler line - any tips or tricks that made the job easier with less mess ? * I tried using a inexpensive fluid syphon pump through my ATF fill tube but only removed 1.5 ~ 2 qrts which is a bit too slow a process on a '02 Trailblazer .
Tips & Tricks for ATF Flush Through Cooler Line ?
- Thread starter ChrisD46
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Might have to plug off the unused line; on mine when the pan started to get low it did not like pumping much out the cooler line.
Also don't do this anyplace where you don't mind mopping up fluid. It can squirt out a couple feet if you pull the wrong line.
Also don't do this anyplace where you don't mind mopping up fluid. It can squirt out a couple feet if you pull the wrong line.
I've been doing this for years-but on older GM cars mostly with the THM400. I get the flare wrench on the radiator fitting(upper on these)and after removal of the line, push a hose over-snug fit-and direct the hose into an old gas jug. I start the car and idle til I get about 4 quarts out-doesn't take long! Shut off and replace with fresh ATF in the amount removed. This on cars I've owned for years and already know the condition of the transmission and filter. The more recent autos with the 'interesting' line fittings, I haven't done tho-good luck. Dan Mpls. Mn.
I have done it on a few cars. If you install a Magnefine filter you can then just unclamp one side of the filter. Some vehicles need to be in N rather than P to run the pump.
I have found on some vehicle's it is easier to break the return line from the cooler at the transmission. Whatever works for you. Be sure to flush your cooler with new ATF. Shut engine off as soon as it starts to spit. I like to drop the pan and change the filter at this point.
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