I'm pretty familiar with lots of Ford stuff, including AOD, but not E4OD, the "electronic" C-6. Got a '90 F-150 several months ago, shows 60,000 on clock, likely 160,000, runs very well, shifts very well (till this morning!).

Left house to go to town, pulled out on road, shifted 1-2, 2-3 OK, I thought, then suddenly engine overspeed, slipping, 30 mph., not 4th. gear, I thought, slowed down, gave gas, 3rd. seemed to slip again. Stopped. Started off easy, 1-2, 2-3, 3-4 OK, no trouble rest of day.

A fluke? Shift solenoid sticky, dirty, or something more sinister. Going to break? I brought back 2,000 lbs. of bags of ready-mix, really don't want to break down not knowing a soul here to call for help. New resident area July.

What do you transmission gurus think? Thanks! impish

 

The way you describe it sounds similar to what my 97 f250 E4OD started doing about 6 months ago. Seemed to go into neutral between gears, causing engine to race rather then shifting, I would have to back off the gas and wait for it to shift. It only did it once in a great while at first, but then after a few months it was getting much more often(almost every stop sign and uphill downshift) Ended up putting in a new tranny a few weeks ago.

Hopefully this is not the case for you

 

Check the MPLS. If it's faulty, it could be sending inaccurate information to the ECU.

https://www.ford-trucks.com/forums/2...ml#post2220974

 

my grandpa had this on his 94. when it happened it was usually always with a trailer or going up a steep hill the way he described it is this: you push down on the gas to make it downshift. the computer is oversensitive to the throttle input and double downshifts this takes longer so the engines revs if you let it keep revving it will actually shift and pull hard which is a little hard on the motor but in his case and maybe yours when you let off the gas it slams really really hard back into gear. ( like knocked a full coffe mug off the tray on the dash hard) which isnt good for the tranny so he just usually lets the motor rev and **** then to let off as far as codes or anything it doesnt pull any and works fine so i think the drivetrain is just overly sensitive

 

any reason it blanked out shift unless maybe i forgot the f or something

 

My 94 Bronco did the same thing. I'd be driving along, and it would go to shift, but would rev up, as if in neutral, and then slam back into gear very hard. +1 to the MLPS, I ended up getting rid of my Bronco before fixing it, but I heard that the MLPS being faulty could cause this. I guess the MLPS is alot like a Neutral Safety Switch.

 

Before jumping to the store, check the basics, as this same symptom will show if the transmission is lacking over 2qts of ATF. To check the ATF level, get the truck to the operating temperature, like a 10 minute drive to the grocery store, since you want the transmission to do some shifts before measuring, then, measure the level while iddling in Park (P). My recomendation to make that transmission last longer? get a good cooler, like the one from B&M. Oh, and if you haven't done it, you could replace the old ATF and filter, it's a little annoying to do, but quite easy.

 

i should have noted that my grandpas tranny only did it when it was warmed up with a trailer or steep hill