98 ford expedition 4.6 2wd, 4r70w only reverse works
<HR style="COLOR: #d1d1e1; BACKGROUND-COLOR: #d1d1e1" SIZE=1><!-- / icon and title --><!-- message -->here's the low down on what happen.
first off the truck overheated a little then was cooled off and coolant added. about a week later it wouldn't go forward so i told my wife to check the tranny fluid it was low barely on the dipstick, fluid was added and she was on her way. this past weekend the truck sheard all 5 lugnuts on the driver rear wheel. fixed that but went to drive it away and the tranny was slipping a little. added 2 quarts to fill and on the way again. 3 days later went to drive it to my dads shop to find out where the fluid is going, its slips again, added 2 quarts to fill just to drive 6 miles. it drives fine until i get to my destination we have to stop to open a gate, i put in neutral to roll back to open the gate and no forward gears, only revers. i drive backwards to the shop about 300' and the tranny is empty again. looks like the fluid is going into the radiator which i'm sure caused the overheating a couple weeks back. no water is getting into the tranny. i've changed the filter and fluid and radiator, but still no forward gears only reverse. could there be an easy fix, electical part maybe or mechanical or do you think its trashed and need replacing. thanks in advance.

 

I've never seen one leak into the radiator and not also leak into the trans. Does the hole that must be in the trans radiator cooler only allow thick (relatively) ATF to leak into the coolant, but not allow thin coolant to leak into the trans? That must be a magical hole.

Water and coolant will dissolve the glue that holds the clutch material to the steel plates. Then the clutch comes apart. Running the trans very low, especially multiple times, will destroy the clutches.

This trans is toast. There is nothing electrical that can cause this. You can unplug all the electrical connectors from the trans and it will still drive forward and backwards.

 

thanks, i figured as much, but as for the fluid transfer i don't have no idea how it happes like that, but its the second time i've seen it. i had a 95 s-10 blazer that did the same thing. i've already made plans to pull the tranny this weekend. starting today. any tips or things too look out for?