anyone know how many quarts trans fluid when changing fluid

 

It depends on what tranny you are running.
Also, is it auto or manual transmission?

C4: 9.6 to 10 quarts
C5: 11 quarts
C6: 11.7 to 13.5 quarts

AOD: 12 quarts
E4OD: 16.2 to 17.7 quarts

 

IIRC, it took about 3 quarts when I dropped the pan and changed the filter.

I'd be interested in others' responses - wondering if I missed something during the process?

 

I got the numbers I posted from the repair manual.
It listed them as:

Automatic transmission(U.S. quarts)(total system capacity)

Not sure how that differs from when you drop the pan and change
the filter. I would have thought it would be like an oil change, when
you drain the oil, all the oil in the engine comes out. Perhaps the transmission is different when you drain it?

 

Found this little tidbit when I was searching the 'net for transmission capacity.

It suggests draining the torque converter as it holds transmission fluid also.
It was step 4 in a transmission drain/refill process.

4. Place your drain pan under the inspection hole and remove the drain plug out of the torque converter with an 11mm socket and extension. The oil will pour out slowly... in fact it may take a couple hours to fully drain the torque converter. It is estimated that it holds almost half of the transmission fluid capacity or around 6 quarts.

 

Here is the entire procedure as I found it:

1. Wait until the vehicle has cooled off for at least 1/2hr if you've just driven it to avoid getting a "hot oil treatment"... burns hurt!
2. Remove the rubber inspection grommet (1 1/2inch diameter) between the engine and the transmission in the bottom of the bell housing. Use a flathead screwdriver to pry it out - not difficult.
3. With an assistant under the vehicle looking into the inspection hole with a flashlight or worklight, use the 18mm socket & wrench to turn the crankshaft pulley (by the radiator) to turn the engine (clockwise). In the inspection hole you will see the torque converter. Have your assistant stop you turning the engine when the 11mm drain bolt is visible in the torque converter. You can do the procedure yourself but it is a lot of climbing under the vehicle and back to turning the crank pulley until you find the plug.
4. Place your drain pan under the inspection hole and remove the drain plug out of the torque converter with an 11mm socket and extension. The oil will pour out slowly... in fact it may take a couple hours to fully drain the torque converter. It is estimated that it holds almost half of the transmission fluid capacity or around 6 quarts.
5. Replace the drain plug and tighten securely but do not over-tighten. Some people like to use locktite on the threads to prevent it coming out. This is difficult unless you let it drain overnight so you can clean off the plug and dry off the threads in the torque converter. If fluid is still dripping out it will be difficult. It's optional! Ok, then after tightening the plug, replace the inspection cover.
6. Loosen all the bolts holding the transmission oil pan on. Carefully remove the bolts by one corner of the pan. Carefully pry the pan down at that corner with your drain pan underneath. There will be fluid going everywhere. Try to get a drain pan that is at least 18 inches wide.
7. Keep removing the other bolts but leave them loose on one edge to hold the pan up. Tilt it more to get more oil out. Once half of the oil is drained hold the pan back up with an assistant if you have one and remove the rest of the bolts while your assistant holds the pan up. Then carefully drop the pan (without spilling fluid all over yourself) into your drain pan. Drain it.
8. Using rags or paper towels and solvent clean the interior of the pan and carefully remove the sludge from the pan magnet at the bottom. There is a metallic film on most of the pan surfaces that will wipe off.
9. Note the position of the OE filter, pull it off and replace it with the new one, make sure the old rubber seal comes out too. Pop the new filter in place of the old one in the same position. Use clean rags to clean the gasket mating surfaces on the pan and the transmission. The old gasket is re-usable. Place the pan back up onto the transmission. Hand-tighten all the bolts.
10. If you have a torque wrench use it to make sure you don't over-tighten the bolts.
11. Using a long funnel fill about 5-6 quarts into the transmission through the dipstick tube. You'll need a small neck funnel.
12. Start the engine and run it for 30 seconds.
13. Fill another 4 or 5 quarts.
14. Start the engine again and run 30 seconds.
15. Inspect level with the dipstick.
16. Fill more oil up to "full" mark on dipstick.
17. Drive it around the block and again check the oil level.

You're done!