Try changing your transaxle fluid to a synthetic. You can search and read reviews on which one to use. For now (or forever) just blip the throttle to about 1500-1750 before fisting it into gear. This should work very well if done right. If it doesn't work, I'd say it's time to rebuild probably. Someone else should chime in sometime soon. How many miles on it? This thread would actually be in the transaxle forum below, but it's your first post, so I don't think people will care. Watch out for Search Nazi's and welcome to CEG.

Oh, by the way, don't listen to Zippy Zetec a.k.a. luvinmycontour.