Hi All. I recently changed the transmission fluid and filter on my '94 with 79K on a Jasper rebuilt transmission. I am having two issues. First, is that since the fluid change, whenever I am in a stopped position on a hill or slight incline, particularly when the transmission is cold, and put my foot on the accelerator, the transmission does not seem to engage the first gear. If I take my foot off the brake, the truck will roll backwards. Once the RPM's increase to about 2500, it will slam into gear with a jerk. This didn't happen prior to the fluid and filter change. This is really disconcerting. I did overfill the transmission with fluid, but I syphoned the extra out, and each time I check the fluid level now, it appears to be ok. Any ideas as to what is causing this or how to fix it? NOTE: Just looked at some old threads, and realized that the filter I installed did not have O rings. They may have been in the package, but if they were, I completely missed them. Ugh! Can't believe I did that! Could the lack of O rings on the filter cause the slipping problem? All was fine before the filter and fluid change. Second issue is that fluid seems to be leaking around the pan gasket. The pan's gasket surface seems to be ok, and I torqued the pan bolts to spec. I have never used gasket sealant, but I am now wondering if I should have used it. What is the best way to seal the pan so that fluid doesn't seep or drip out?