Thanks in advance for your help.........I have a 94 LS400 that hesitates on hard acceleration. When I put the hammer down it feels like the tranny is slipping, but I know it is not the tranny.....just a bunch of hiccups. Any Ideas what this could be??? Really not sure how to explain, except that it takes off smoothly and then gets jerky (the tranny is not shifting gears when this happens).