C4 Transmission fluid question...
Recently I had my automatic 1966 HiPo automatic transmission out of the car when it was being restored. We had a separate mechanic working on the transmission from us when doing the engine detailing and clean up. Once back on the car we had a ton of fluid leaking from the pan and from the band adjustment lock nuts. Now I have no problem redoing the bands and the pan from all the research and help I've gotten. But the question I have is related to filling the transmission back up with fluids.
1) The attached image is what the guy used to fill the transmission (looks like cheap stuff, but I don't really know), this is not Type F, and from everything I've read, most people suggest staying with the older Type F on an older "not rebuilt" transmission. Or is what he put in fine?
2) The reason I ask is if I am changing to Type F, I assume I completely need to drain the entire transmission, including the Torque Converted as well, or can I skip this step and leave what's in there and have a subtle mix?
3) If I do have to completely drain and refill the entire transmission, is the method below the full sequence for firing up the car and adding fluids when it's been completely drained? I read a post somewhere that said not to completely drain the torque converter because of "shock to the seals and system"... Is this true?
"If you just do the pan drop then you will need 5 quarts.
If you do the convertor and pan then you will need 9 quarts.
1. Place the gasket on the pan and install (tighten to spec's don't over tighten).
2. Pour 5 quarts of type 'F' into the filler tube (check for leaks).
3. Start the car, slowly shift the shifter all the way down and up a few times (pause at every gear). You will not feel it going into gear, keep the car running and check for leaks, add some more fluid.
4. Try shifting again this time it will go into gear return the shifter to park and top up the transmission to full on the dip stick (don't over fill) remember to check for leaks. If no leaks take it for a test spin around the block and park it and shut it off and once again check for leak. If no leak re-install the inspection plate.
When you buy the gasket they usually come in a small box and the gasket is twisted everywhere which makes it hard to install. A good tip is to flatten it out the night before, put it between two big books and put a weight on top."
Any help or opinions would be appreciated.
Thanks in advance...