2003 explorer squeal

[tworanger]

I have a 2003 Ford Explorer with the 4.0, 4wd, 93,000 miles, and the trannhy fluid has been chnged at 60,000 miles. when traveling around 45-50 and you floor it, the tranny downshifts to second and squeals until it upshifts to third. the first time i noticed it i was accelerating on a highway, not floored but into the throttle 3/4 just going through the gears like normal. the nxt time a month later or so i was towing a 4500 pound trailer(i have to tow package and everyting is properly set up, i do not use over drive) on the freeway(60mph) up a slight hill enough to cause a down shift to either 3rd or 2nd and caused the whine till it shifts out of whatever gear it was in. now it seems to do it with about a 3/4 throttle when about to shift to 3rd from second(4000-4500 rpms) it can cause a squeal similar to squeaky brakes for just a second. No idiot lights or rough shiftling though. I have heard about some sileniods and 2-3 gears shift problems in this tranny, any help would be great

 

[backerm]

what kind of tranny you got in the there? be a good idea to change the fluid now. suppossed to change fluid every 30K miles, or more if you tow. Unless you use synethic.

 

[tworanger]

Not much towing, 75mi a year, 5 speed automatic and i'm pretty sure it is conventional

 

[backerm]

it must be the 5r55. suppossed to change the fluid every 30k. some places still do it the old fashioned way just drain it, this only changes 3 or 4 qts. out of the 14-15 qts. possible. Find a mechanic that will do a total fluid renew. Its over twice the cost but well worth the money.