So I had my batteries disconnected for about two hours the other night while I addressed some starter issues on my truck. I hooked everything back up and now when I am having shifting issues, it feels like the torque converter is locking up early and it hunts in and out under WOT. when I am slowing down it doesn't seem to unlock or downshift until I come to a stop, and lugs really bad when I get back on the throttle. what have I caused to happen here? thanks in advance for any pointers

truck stats: '97 F350 CC PSD 35" tires 4:10 gears 107k miles 15k on rebuilt trans.

 

Put some miles on it and see if it comes around.

 

you should be very careful giving advice on a trans that cost as much as some of these trucks now.
if he follows your advice here for example,he's likely to loose his converter and, or, whole transmission in very short order.
the problem is likely electrical and needs to be addressed asap.
with 15k miles,she should be under warranty.take it back to the shop and have them diagnose the issue would be the best bet.

 

Check your grounds at the batteries make sure they are clean and have a good connection

 

Well I guess the sky could fall too. Why not advise the OP call a tow truck just in case every time he disconnects the battery.

The PCM is likely relearning. The only way to do that is to drive the truck. If the Op wasn't having any issues with the transmission before the batteries were disconnected I believe this to be the case.

Are there any other questions?

 

Thanks Pete, that was the issue - my '03 cobra needed to "relearn" how I drove it after the battery was unhooked but this was a little more dramatic so I figured I better run it by some fellow motorheads before I went Evel Knievel on it. Thanks!

 

ahh i stand corrected.our old systems don't work like that.
i'll go back to reading in here where i belong.
well that's a relief.what a fear that would put in me on a fresh rebuilt trans.

 

I'm just repeating what racerx told me. I bought a valve body from them and my trans shifted really, really hard. I asked about this learning curve and they said our OBS's don't learn. They said the SD's did. My chip was screwing up my shifting with the new valve body and after I got that reburned everything was good. So.....maybe its just different PCM's in our OBS's, some learn, some don't? I'm confused. Or maybe I just misunderstood RacerX?

 

Nuff said
https://www.ford-trucks.com/forums/1...ml#post9779289

 

The PCM doesn't learn in the 7.3L. It does in the gas, and the 6.0L did, but the moron in charge of the software for the 7.3L didn't think the PCM could learn unless it was also firing spark plugs. They got rid of him after all the 7.3L software was done.

 

Okay
Mark how come people keep think that then? Is that because of chips and or sparking moding a chip or maybe its even heat related and the connections get better or even a circuit voltage improvement, springs get unhung-- dont know just guessing.

I keep seeing this mentioned yr after yr that the pcm can learn some, so thats why I ask, see it mentioned in other diesel sites too. Your thoughts on that are appreciated.

Maybe its teh gas ones that are throwing everyone off

 

I think everyone thinks that because the owner's manual says that it does. The gas ones do, the 7.3L ones do not.

 

Mark, I like your avatar now, it really suits you,G

 

Thanks! The old one, with the racetruck, had me in it. This one does look better.

 

Mark if it doesn't have to learn then why does my truck shift all over the place for the first coue of take off's then it goes back to normal shift points after the batteries have been disconnected for awhile