tranny slips to all gears

[chrisis]

hey guys

i'm trying to help a friend that he has a 2002 ford explorer 4.0L V6 FI SOHC / 4 WHEEL DRIVE with 85000 miles.

yesterday the transmission started to slip throw all gears.

<<NO LIGHT FLASHING IN THE DASH>>

i told him not to move it.

Do you know if an additive or if we change fluid and filter is a good start before we get to something more expensive and propably rebuild?

 

[Glacier991]

A failing Electronic Pressure Control solenoid failure could result in this, as could a blown control (Valve) body gasket. A filter and fluid change cannot hurt, but I bet what is needed is covered nicely in the 5R55E Valve Body Rebuild Diary in the stickies section above.