shifting problems 93 aro,4.0 4aol

[oldmanbergie]

my 93 arostar quit shifting just like the vacume mogulator went bad. one time the hose cracked and fell off, doing the same thing again. have installed a new moduletor, new hoses engine end, and transmission end, thought i had a bad moduletor installed a new second unit, and yes the pin is inside valve. have checked and do have vacume at transmission, seems low did not install a guage yet. will not shift out of 1 gear untill aprox 45 mph, can let off the throtle to make shift through all gears, HELP.

[DCRB]

dang that's high... what's your tranny fluid look like, and what's the level of it?

[Pablo-UA]

Problem may be hidden deep in valve body ore in governor

[oldmanbergie]

the fluid isn't as red as new i have added lucas trans tune up/stop leak.

[Bear River]

Get all that old fluid out with the gentle flush procedure that is pinned. If you don't get that stuff out, the tranny will tear itself apart.
http://www.ford-trucks.com/forums/71...procedure.html

[93nighthawk]

I agree with Bear, get the old stuff out, and get some high quality Mercon III/V in there.