Originally posted by CiscoKiDD
That trans is basically an E4OD.
The R470W....and the 4R100(as I think its called) are all the same animal...just with upgraded components...
I think you're a bit confused on the application here. The 4R100 is the evolution of the E4OD transmission. The 4R70W is the evolution of the AOD & AOD-E transmissions. Different transmission families.
Ford Rulez All,
Before you decide on a replacement, you'll want to be certain of which transmisison you have because Ford offered the 4R100 and the 4R70W with the 5.4L engine in 1999.
If you have the 4R100, Factory Tech's monster box is strong.
If you have the 4R70W, there's not a whole lot you can do to toughen it up. The only difference between the 4R70W behind a 5.4L F-150 and the 4R70W behind the 3.8L Mustang is on additional clutch pack.
makes a strong 4R70W for under $2500.00, as does Performance Automatic
. All you really need to do though is add a shift kit, or replace the current valve body. You'll also want to replace the intermediate shaft at some point. They tend to break under high torque, stressful applications. When I was speaking with a transmission tech who handles a lot of the MN State Patrol Crown Vics, he said the number one failure, when they actually break their transmissions, is the intermediate shaft. It is the weakest point of the 4R70W.