I have a 1997 f150 5.4 E4OD that has a lot of miles on it. The odometer broke over 10 years ago @280,000.

This summer I was hauling cows with my f150 pulling a gooseneck stock trailer cause my F350 was in the body shop. I was pulling through the North GA mountains and the OD light starts blinking and it begins to shift hard. I made it home 200 miles without a problem.

I havent used the truck much since then, but I blew up my V10 a few days ago, so I started hauling hay with it this past week. The slipping has gotten worse, and it gets worse every day.

When the trans is cold first thing in the morning it works great. But as it warms up, the converter lockup gets weaker and weaker to the point it will slip with any ammount of throttle. Otherwise the trans is shifting fine and every gear holds.

I have been riding around in 2nd gear to keep the lockup clutch from engaging. But that is getting old. Do you folks have any advice? I feel like the trans is fine. The TCC seems fine too cause it holds firm when the fluid is cold. I recently changed the trans fluid and filter. I think I used ATF and pouch of shudder fixx.

I would at least like to disable the TCC solenoid so I can go 55 without taching 4500 rpm.

 

If the OD light was blinking, there are trouble codes. Read out the OBD2 with a scanner that can read Ford transmission codes.

 

Pretty much guarantee it would post a P1744 DTC (excessive TC slip ratio).

 

It sounds like the transmission needs to be replaced. With that many miles it doesn't owe you anything.

 

I dont remember the exact code but it was a slip code. I'll get the code pulled again and give the exact number. Any chance the TCC solenoid be bad?

 

There's always a chance of that (or a hydraulic leak or a worn valve body or some other worn out part).

It's guaranteed that the TC is bad, it only has to slip once and it's toast.

 

My f350 with 4R100 started acting up at around 200,000 miles. It would bang into gear, then flare and slip for a long time after shifts. I took it to a tranny shop and they told me it was time for a rebuild. I surmised it just had a problem, because it would work fine otherwise. I took it to a shade tree mechanic friend of mine who knows how to fix junk instead of replace it. He figured it was an issue with the accumulator. He had an old accumulator laying in the junk pile out of a broken trans, so he popped it in. That was about 130,000 miles ago, and it hasn't been worked on since. I was hoping for something of the sort like that!

 

Take it to the shade tree guy if he's still around.

 

It has been over a year since I worked on my f150. I started piddling with it today and I found this post in my search for a fix. I forgot I posted this. I thought it was kinda funny that my f350 has almost 370,000 miles on the transmission that my shadetree mechanic patched. I towed a 30ft gooseneck trailer with a telehandler on it yesterday. Tipped the scales at 41,100lbs. I've gotten almost 170,000 more miles out of it since I got the news it "needed a rebuild"

 

No trying to be an a$$ but why did you even ask for advice? To stroke your ego? Sounds to me like you are a broke hillbilly who drives junky a$$ crap and thinks it’s the best thing on the road. Nobody wants to hear your stupid stories. 🤡