Im not even at 3k with my 3.73s and TH400. Im at around 2800 and when I switch to 3.42s here soon it should go down to around 2500. Thats at 60mph though.darbysan said:Good point! If you have a 3 speed trans, then this is probably too high, unless it is just for fun. 3.42 is OK, but even then you are running 3k at hwy speeds. If you have a 4 speed OD trans, then these are perfect.