I'M LOOKING TO BUY A NEW COOLANT LINE THAT RUNS FROM THE TOP PORT ON THE RADIATOR TO THE TRANSMISSION. iT GOT KINKED WHEN THE PLACE CHANGED MY MOTOR FOR ME AND THEIR FIX WAS TO CUT IT AND PUT A BLACK HOSE ON IT WITH CLAMPS..SO I'M GOING TO TAKE THAT OFF AND DO IT RIGHT BECAUSE RIGHT NOW IT LEAKS LIKE A SOAB.....BUT LOOKING AT THEROCKAUTO.COM..IT LISTS A 4R100 AND AN 4R70W TRANSMISSION FOR THESE TRUCKS. I HAVE AN 2000 F150 LARIAT 5.4L ENGINE 4X4 WITH AUTO TRANSMISSION. IS THE 4R100 A 2WD AND 4R70W 4WD???

 

no, the 4R70 is for both 4x2 and 4x4, the 4R100 is for the F150 7700

 

ok Thanks..So mine is the 4R70W

 

Look at your door jamb Id plate. There is a transmission code under TR I believe its at the bottom right side.
U is the 4R70W.

 

Transmission codes E or 7 is the 4R1000

 

have heard the 4R100 is stronger. I have the 4R70W with the 5.4 and factory tow package, have towed 5k lbs with it, no problems.