2003 7.3L PSD Hard shift or won't shift from 2nd to 3rd

[m2b1969]

I have a 2003 F250 SD 4x4 w/ automatic transmission. Not sure which transmission is in it. I am not knowlegable about transmissions. Here is my problem. Sometimes this happens and sometimes it doesn't.

I come to a light and stop. Light turns green I step on the accelerator as normal, and go forward the tranny shifts from 1st to 2nd (no problems) then the truck starts to bog down, smoke comes out the tailpipe, and will not shift from 2nd to 3rd, and if I let off the accelerator for a brief moment and re-accelerate it shifts hard, and goes into 3rd, and wahlah no more problems shifting. Then it will not occur again for a few more times, and then it does it again all the sudden. Then it goes away for a few days, but always comes back.

Now if I get on it off the light it shifts hard, but it will shift, and does not bog down. Any suggestions on this one, would be greatly appreciated, and how to figure out what kind of transmission I have.

Thanks

[jesilvas]

Is it an auto?
If so, it's a 4R100.
That's weird. It may not be trans related, and may be.

[m2b1969]

Yes it is an auto. WHat do you think it may be besides the tranny? Thanks for the help

[jesilvas]

Could be an injection/wiring issue. It's hard to tell.
Really, you need to see if you can get it scanned either for stored codes or while it's happening. And not just some cheap scanner will work, especially for trans codes.

[m2b1969]

roger that. Any suggestions on scanners? I have a code scout. Thanks for the help.

[85_305]

AE or the likes. snapon... dealership if you must.