What are the differences between a 4R75W and a 4R70W transmission?

 

I'm not a trans expert but I've never heard of a 4R75W. What is it used in?

 

It is in my 2004 Ford Expedition. The 4.6L's get the 4R70W and the 5.4L's get the 4R75W. I think the expeditions used to use the 4R100 prior to 2003. I don't know why they changed transmissions as they still use the same 5.4L.

 

you mean the new 5 speed auto tranny? they are totally different in every way.

 

The 4R75W is a 4-speed auto
http://www.modernengineuity.com/specs/04mdr.htm

 

here is a cut and paste from ford media about 4r75e...:

ENHANCED AUTOMATIC TRANSMISSIONS

Matched to the new 5.4-liter V-8 is a new 4R75E automatic transmission, an evolution of the 4R70E used on the current F-150. Upgraded to handle the torque of the 5.4-liter engine, this transmission shares patented upgrades with the 4R70E, which backs the 4.6-liter V-8:

* A redesigned torque converter improves launch performance and increases efficiency.
* A turbine speed sensor improves transmission control, providing the basis for fully electronic shift scheduling to limit "hunting" and to fine-tune shift speed and feel.
* Increased microprocessor speed improves responsiveness and precision of the control system.
* "Smart" fully electronic shift scheduling knows what the torque will be in the next gear so it chooses the shift points based on the vehicle's projected performance in the next gear.
* Coupled with the electronic throttle strategy, the transmission computes the output torque required to maintain the vehicle speed, and chooses the correct gear and converter state accordingly.
* A sealed case and lifetime transmission fluid make the transmission maintenance free, while adaptive pressure control maintains consistent shift feel over time.

By predicting the performance of the truck in the next gear, the computer-controlled transmissions provide a more sophisticated solution to heavy demands than a simple shift delay switch, such as the one-size-fits-all "towing mode" some competitors use.

 

Thanks everyone for the reply's. I checked my owners manual again and under refill capacities it says 4R70/75 E-W On my window sticker it says AODEW/4R talk about confusing! Anyway I do know that it is a 4 speed Auto, that much I do know!

 

The 70, 75, and 100 are the torque ratings; 700, 750, and 1000 ft./lbs. which is engine torque multiplied by 2 by the torque convertor. So, 350, 375, and 500 ft./lbs. of engine torque.

 

Am I blessed or no... My work van locked up and would not even push when in N . I put more trans fluid in thinking my day b4 rad swap left me low. Somehow I rocked it into R and then D and made it 60 miles home honestly thinking it was the rear end untill i inspected the pan, Below is what I found in the pan. My question is will my Neighbors blown 03 Expedition 5.4 w/ a 4R70W Drop into my 03 e150 5.4 / a 4R75W I'm hoping I might get blessed for a change. Thanks!!!

 

There was no 4R75W in 2003. If they are both 4R70W, 2003, and the Expy is 2wd they should interchange. If the van is 2004 they will not interchange.