4R75W trans in '04: Different?

[David Morton]

Is this just a beefed-up version of the 4R70W or is it a different design?

[Bradley G]

Is this just a beefed-up version of the 4R70W or is it a different design?I think upgrades to the converter are the basic differences

[MENINBLK]

Is this just a beefed-up version of the 4R70W or is it a different design?

There are more differences than just a Torque Converter.
I do not have a list of all of them, but the 4R70W was failing very early on, where the 4R75W
made a lot of corrections to the 4R70W so that they would be more reliable.

[Smokie]

Does anyone know, if the 4R70W has a failure, do the repairs convert to the upgraded 4R75W parts or they simply install the same 4R70W parts ????

[David Morton]

Look what I found.

http://www.f150online.com/forums/archive/topic/154137-1.html

Back in the fifties some hot rod motorhead took a GMC 6-71 diesel truck blower and put it on top of a gasoline engine and history was made. Go to the truckers if you want to find out about performance parts. They're always about ten years ahead of the rest of us. What we call 'performance' they just call heavy duty.

[joflewbyu2]

good find. With just about everyone doing a computer tune/tuner and some changing the torque converter, there really isn't much of a difference. Here is what is on the Mercury site "refinements include the addition of needle bearings and Teflon seals to a new 11.25-inch high-stall-speed torque converter with a one-inch one-way clutch. The new transmission provides quicker upshifts and downshifts, and lets the driver “kick down” into first gear at a higher speed." http://media.ford.com/products/presskit_display.cfm?vehicle_i d=955&press_subsection_id=421&make_id=94

[MENINBLK]

Look what I found.

http://www.f150online.com/forums/archive/topic/154137-1.html


"A sealed case and lifetime transmission fluid make the transmission maintenance free,
while adaptive pressure control maintains consistent shift feel over time."

The FORD definition of "LIFETIME" is 36 months.

Don't ever trust anyone who says that fluids are "LIFETIME".

How many people have ever changed their BRAKE FLUID ?
Did you know that it needs to be replaced every TWO YEARS !!!