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So how are you changing tranny fluid ? I was thinking suck fluid out before changing filter ?? I just changed lines I have 4 pipes from the ends .What I found worked after I made a mess from the tubing coming out and pumping oil everywhere was get the adapter piece and hose. It snaps in just like the oil cooler line.
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So. I originally got the oil out of the pan by using the method of tapping the lower trans line (its the one that oil will be pumped out of) on the driver side for my 18 Tahoe. Start vehicle and let trans pump bring out oil until you see air bubbles. I then dropped the pan partially, changed the filter, magnet and wiped out pan. Then put about 8 quarts back in and begin to pump again until fluid was cherry red. I suspect I got about 10 or so of the 12 qts out that way. Then just topped off to bring up to fill mark. I did some towing over the summer and just wanted to do a quick fluid exchange without going through the hassle of disconnecting the line so I picked up a pump. It worked great. It got out about 5.25 qts. The only thing is that the suction line is not long enough so I picked up clear tubing at Lowe’s. 3/8 OD. Fit over pump tubing snug. Just make sure that the bought tubing is long enough to make your connection outside of the dipstick. I did the fluid exchange on a stone cold vehicle. I put back exactly what I took out. Easy transfer.
