urgent tranny problem

i have a 2001 supercrer f150 4x4 and i am not sure which tranny i have how can i tell if it is an 4r100w or a 4 r70w please let me know

You can call the dealer with your vin and they should be able to tell you. If my memory serves right the 4r100w is the tranny that comes in F250 and lightnings and is a heavy duty tranny. The 4r70w comes in 150 and is a piece of crap I'm on #2 in less than a year, don't let anyone install a shift kit in it either

Its the 4R70W. Came in 1995-2003 f-150s RWD/4x4, the 4R100 was available but more than likely its the 4R70W.

The 4R70W was behind the 4.6L only thru 2000 or so, then behind both the 4.6L and 5.4L after that.

So, if it is a 5.4L, it *could be* a 4R100.