Hi yall. I am about to get a '89 LC. Im trying to get all the info I possibly can. He told me it has a few problems. The major being "the transmission has problems. I will be able to make it to work probably. But it slips on the highway." Starting I'm going to do a filter fluid change. Any preferences for the best additive? He said it a has a t?? (Like t56) But I thought a440 was the trans that came with it. I know he said 4 speed with over drive. Does this sound correct? Possibly looking at rebuilding it if need be. I am fairly comfortable with it. Rock auto has a 275$ kit. Even 3 screw ups is cheaper then buying a rebuilt one. The water pump leaks. Then I believe he changed the 2 front windows from power to manual. It has 300k on it. Missouri first 13 years then 18 in Las Cruces. No rust. Besides what I listed what should I do?? Of course a motor tune up as well. I appreciate everyone's input.