tarnold wrote:
J/D, my 1997 e350 VIN says an 44e transmission, which is a e40d, so 97's can go either way?
Till you brought that up, it was my understanding that when E-Series went to V10, they also changed from E4OD to 4R100. Either transmission was still the venerable C6 (three speed and very durable) with Overdrive added. The change, was going from E4OD's hydraulic valve body plus electric OD engagement, to a fully electronic (solenoids instead of hydraulics) valve body. Then they changed the name to match their new scheme, where 4R was Four Speed Rear Drive, and 100 meant 1000-ft-lb of Multiplied Torque. Say the Torque Converter multiplies Engine Torque by doubling it, and the engine has 400-ft-lb. That'd be 800 into a transmission rated for 1000 so the combination is Good To Go.
It does seem Ford closed out its inventory of 1996 E4OD's into 1997 vehicles. A cousin worked for Ford for decades, in vehicle assembly plants. Said "I don't know how Mechanics keep up - We build with what the send us and those neat Mid Year Change Bulletins don't tell the whole story."
You didn't ask, but I'm sure you could NOT "upgrade" to a 4R100 (or a 5R115 TorqShift) without a total transplant of ECM, wiring, and a whole other bunch of interfaces. You might have to change the Radio before you were done...