I have a 86 cimarron..I know that it may not be the best caddy ever produced..but it was given to me and it runs great (after some head porting and stuff). Anyway - I want to put an auto trans that has 4 gears (or over drive) in it..It has the stock thm 125, 3 speed in it now...Does anyone know if I can put in a thm 440t4 or any other transmission...The 3300 rpms at 70 mph is a little too much....