4R75W and 4R70W Differences??? - F150online Forums


4R75W and 4R70W Differences???

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  #1  
Old 04-17-2004, 11:12 PM
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Question 4R75W and 4R70W Differences???

What are the differences between a 4R75W and a 4R70W transmission?
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Old 04-20-2004, 05:47 PM
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I'm not a trans expert but I've never heard of a 4R75W. What is it used in?
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Old 04-21-2004, 07:24 PM
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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.
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Old 04-24-2004, 03:19 PM
 
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you mean the new 5 speed auto tranny? they are totally different in every way.
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Old 04-24-2004, 03:36 PM
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Quote:
Originally posted by silver bullit99
you mean the new 5 speed auto tranny?
The 4R75W is a 4-speed auto
http://www.modernengineuity.com/specs/04mdr.htm
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Old 04-24-2004, 03:44 PM
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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.

Last edited by TroyK; 04-24-2004 at 03:49 PM.
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  #7  
Old 04-24-2004, 04:14 PM
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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!
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Old 04-24-2004, 06:47 PM
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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.
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