Tranny Oil Cooler Line Question

[colnago]

I put in a new radiator the other day, which meant disconnecting the C6 tranny oil cooler lines. I expected tranny oil to come out, so I had a couple of pencils to jam in the lines as I removed them. I hardly had a dribble, and ended up putting a plastic bin on the driveway to catch anything that dripped out. The radiator probably took a couple of hours to replace. During that time, I might have had 1/4 cup of tranny oil drip out.

My question is, while the engine is off, and the tranny not spinning. should I have had more tranny fluid come out, or does it only pump it through the system when it is turning? I expect I have some plugged lines, because there should have been some fluid in the cooler itself, and it didn't drip, either.

Any pointers?

Joseph

[Donnie]

Hi, with the engine off, you will get only a small amount of oel out of your system , the cooler in the rad is small , the lines are horizontal & the pump is not moving any fluid.....your experience is normal........donnie

[colnago]

So, since I parked with the front of the truck pointed to the top of my driveway, did the fluid in the cooler simply drain back into the tranny, and gravity kept it from coming out the lines when I was swapping radiators? Is there a "good way" of checking for plugged lines without having tranny fluid all over my driveway? Mity-Vac, maybe?

Joseph

[Donnie]

Hi, if you were on a steep enough incline, what you said makes sense..
The easy was to check cooler flow with out any a flow meter, on the C6,the cooler return line is the rear line.
After refilling the trans and running it a few minutes to circulate the fluid, not long enough to get it hot , a few minutes is enough
Disconnect the rear line & slip a piece of hose over the line & run it down toward the floor...If you set a quart jar into a hog pan (in case of overflow)..have an assistant start the truck while you watch the jar fill up, you can use a can, but a jar will provide a better view.
At engine idle your cooler should flow about a quart in 20 seconds at idle...........Donnie