Changed the tranny fluid and filter, during the filter change I installed the seal and filter as an assembly, I pushed it as far into the oil tube as possible, installed pan, gasket, re-torqued bolts, new tranny fluid, synthetic dexron III (what I had on hand). Poured 3 quarts in and started the car, when I went to put the car in drive nothing at all, no gears will engage. Put in another quart, still nothing. Got on internet and read where there may be air bypassing the seal if its not fully seated. Dropped the pan, while pulling the seal out damaged it. Got the old seal from the used filter and used a deep socket that was the same diameter to tap the seal all the way into place into the oil tube. Installed filter, gasket, pan bolts torqued to 10 ft lbs. Re-used same dexron III fluid (had a clean bucket). Still no drive. The fluid level is full when the car is off, when I start the car it it is halfway between add and full so it looks like the pump is working. Any ideas? Thanks much for your help.