Ranger if that doesn't fix it and I'm assuming this is a 727 then before you do anything else check the O-ring at the base of the dipstick tube. I chased a leak on my '68 road runner for weeks and every time I thought I had it fixed I'd let it sit for a few hours or a day and there was the puddle again. It would only leak after sitting and not when it was running. I tried three different pans and pan gaskets, the reverse light seal and even changed the seal on the shift linkage shaft from inside of the trans and no luck. Then I finally figured out why it leaked after it sat for a while........the torque converter would empty back into the pan and raise the fluid level and it would leak at the base of the dipstick tube, migrate around the front of the pan seal to the left side and make it appear that the gasket and other areas were leaking. Just thought I'd throw that out there if you haven't checked that area and of course if it's a 727.
