Been a little while since I posted last, but my truck has just been doing too good.
Last weekend, a friend called. He had managed to drive off into a hole and gotten his 2005 F250 stuck.
I took my '89 with the PTO winch over and pulled him out. Discovered that his vacuum hubs were not working.

Since we don't feel like tearing the whole spindle section down to replace that back gasket, we had planned on freeing up the driver's side manual **** which is frozen and just using them manually until after Spring Gobbler season.

However, he called today and said he was getting a check engine warning besides the Tow Brake Controller we had on the list also for after turkey season.

I have not scanned it yet, but a friend of his did and says its a P2800 transmission code.
Since its not my truck, I have no service manuals or schematics like I do on all mine.
And I do not see much of any information on the web for that code. Lots for the 700 series about range selector problems, but almost nothing for the "B" circuit.

Are we still looking at the selector on the side of the transmission, or something else?

I will probably look at it tomorrow. Hopefully I'll see something obvious...

Thanks

J.

 

Probably a bad TRS or TRS connector if that's a valid DTC. FWIW, it's not in the Ford service manual for an 05 SD.

 

That doesn't surprise me. He bought this truck used, not that long ago, and he has an absolute genius at buying strange vehicles.

His last truck was a Dodge that had lots of stuff on it that they only made for that one year.
The power steering pump had to be special ordered because they only used that model that one year.........

So, he got rid of it, and bought this one used. I think its the first year they came out with the vacuum hubs, so any improvements are not going to be there.
He is also getting the dreaded TBC warning on the dash when he cranks it up.

From what I have read, the fix for that can range from a blown fuse, chaffed wiring, corrosion in the trailer connector to a new Trailer Brake Controller module.

Right now, its more an annoyance than a worry, so we will tackle it in our spare time. But the P2800 could be serious.

I need to find out more about this truck. I'm guessing its an E4OD, or does it have a newer transmission?

Heck, I don't even know how its controlled. If its totally drive-by-wire with the shift lever just controlling a switch, or if there is still a mechanical linkage.

If its electric like I suspect, then he could lose the ability to put it in gear completely if that switch goes out.
Don't even know where the switch is yet.

I have a friend with a shop, so I can use his computer to check schematics and troubleshooting steps if I have to. But its an hour and a half drive, so I will use that as a last resort.
I'm an electronics engineer who troubleshoots complex equipment from a cold start on
a regular basis, so we will see what I can do.

Any suggestions on the P2800, the hubs, or the TBC greatly appreciated.

J.

 

Hubs probably lost vacuum, could have blown the hose off the back. The auto hubs are nice but not necessary. As long as they work in lock then I wouldn't worry too much about it.

The TBC fault could be pretty much everything you stated above. The CEL code has me confused. The trans is a 5r110w Torqshift btw

 

Thanks for that. I figured Ford had come out with a few replacements for the E4OD. Now I just need to do some reading on that model.

When I ordered my '89 250, I had to specially request a C6, because they were pushing the E4 on all 3/4 and above trucks.
I knew that since it was the first year for it, they were wanting to get in on trucks that would give heavy loads so as to find the problems sooner.

Since I had no desire to be a test bed for them, I stuck with the C6. Friend of mine bought a 250 of the same year with the E4, and I forget how many times it went in the shop under warranty.
My problem is, since I did so much modifications to my truck, I'm not interested in getting a new one anytime soon.

Which means my general knowledge pretty much stops at 1989 or so.
I have learned some isolated stuff about the newer trucks, both Ford and Chevy, but its on a piecemeal basis. No sitting down and reading the shop manuals, that sort of thing like I did with mine.

Now that this problem has cropped up, I will be learning about the newer transmission and control systems.

As I mentioned earlier, I have not scanned it myself yet, so I have not actually seen that code.
Hopefully this weekend I will get a chance to put my Acton on it and verify that number.

If I find out anything new, I'll post back.