Is this for the 6 spd or 4 spd? And for whichever it is, can it be done to the other?

 

My bad, I did it on my 4 speed auto. I won't speak for a 6 speed one way or another but I don't think it would be too hard to figure out. I actually asked about this quite a while back but I didn't get anything back that was directly helpful. I'd specifically asked which line was which line was which on the trans to cooler connections. When I changed some leaky fitting seals on the lines I left the vertically attached line disconnected from the tranny and put it in an oil container and started the engine. I ended up making a small mess in the driveway from the fluid shooting out of the tranny (instead of from the line and into the oil container) but at least I had my answer.

On a 4 speed car the fluid enters the bottom of the trans cooler and exits the top. I don't know if a 6 speed uses the same methodology but that's how I would formulate my guess. It's 50/50 on whether you guess right or not but you're 100% guaranteed to get your answer.k3:

 

I don't think flushes are recommended on the 6 speed trannies in the 2012 + Impalas.Just draining the fluid will result in approx. 4.5 qts of the 5.3 qt. capacity. I am comfortable with less than a quart of old fluid remaining.If you aren't then drain,fill,and drive awhile,then drain and refill again.

 

I don't think flushes are recommended on the 6 speed trannies in the 2012 + Impalas.Just draining the fluid will result in approx. 4.5 qts of the 5.3 qt. capacity. I am comfortable with less than a quart of old fluid remaining.If you aren't then drain fill and drive awhile,then drain and refill again.

That seems reasonable. The 4 speed trans has considerably more fluid and considerably less fluid (percentage wise) gets removed by just dropping the pan. The main concern is keeping the TPS clean on a 4sp so that an otherwise serviceable trans isn't completely sidelined by an expensive to access part. The maintenance of changing fluid every 40k isn't that big of a deal and it definitely isn't that much more work to change all of the fluid instead of just dropping the pan.

...I wish I would have added a shift kit when I had mine apart as well, but that's another story.

 

Add a real Boss Products Magnefine R038M filter to the trans cooler return line using 3/8" German Fuel Injection Clamps and SAE J1532-AT hose. DO NOT use SAE J30R9 fuel hose. It will delaminate and spew fragments through your transmission.
SAE J1532 executive summary.

Add a drain plug to the pan and change the strainer out with a brand new WIX or AC Delco part. Drain the pan and replace the magnefine filter every oil change. You'll never need to drop the transmission pan again.

The magnet in the magnfine filter will catch more of the fine iron dust than any of the pan magnet schemes. The 25 micron paper filter will catch the non ferrous stuff and is fine enough that there will no longer be particles large enough to get caught in the 110 micron strainer. Drain the pan and change the filter just like the engine oil. Refill with Dexron VI.

 

Thanks for that as I will be installed a trans cooler, shift kit and now this as well. I plan on purchasing the tru cool cooler from Dave@TEP, I wasn't sure if the hose that came with it was good or if I would need to use a different kind, he said it comes with everything needed for the install.