i have had a few problems with tranny oil leaking heavily from my gearbox. i noticed the leak was from the main oil seal in the gearbox. Itook it out and replaced it with the proper replacement seal. I put it all together, but she still leaks. I was advised that when topping the tranny fluid up, it will take about 4 1/2 litres. is it common to happen that if i put too much oil in, that it will push the seal out again? your help will be apprieciated in this matter. markwill