Bought another manual, and interestingly enough I now see what you guys are talking about on the under the hood diagrams, but my truck is totally different. The underthe hood schematics for 91-93 7.3L Diesel show my truck. BUT, the one diagram that just says Diesel 7.3L DI with no date has things like the fuse box by the driver finder (nothing is there on mine) and has the PCM against the firewall (not there on mine either). Now I would think I was going crazy or something, but the 91-93 diagram shows exactly what I've got. So here it goes:
1) I guess I dave a 7.3L but NOT a 7.3L DI (???)
2)So now I see the TECA and will clean, (it seems VERY hard to get to an the firewall directly above the fender, right?)
3) Is that cylindrical metal thing above it the Speed Control Servo? because the weird metal wrapped tube that comes out of it and disappears under my Banks box atop the engine looks EXACTLY like the one that comes out from under the box on the other side and then is broken off by my BAP sensor I wrote about earlier- I'm still wondering if that has something to do with the problem.
4)I am still confused about the most important one: THE TRANS SOLENOID PACK, I don't see any Power distribution box in my truck or on the diagram (???) Is it one of the connectors that in my manual are just called
C152, C151, C134, C102, C133, C103, C129, etc. ?
Sorry, I've searched the manuals and the internet, and all I can find is the actual transmission solenoid which is in the transmission above the pan. Thanks again for all your help, I just have to troubleshoot everything this weekend before sending it to the trans shop, because if its NOT something actually inside or attached to the transmission (IE one of these connectors) they claim it is not under warranty. One would think that $2000 and a one year warranty on a transmission would mean that if the transmission doesn't work that they will fix it, but I guess that was way to optimistic of me!

 

You have a 7.3 IDI. DI is the PSD.

The thing with the weird metal wrapped tube is the cruise control servo.

The tranny solenoid pack is internal. The connection is on the passenger side (behinde the heat sheild). Check that plug. Sqeeze and pull up. Do not pry it with a screwdriver. Check for corrosion, damaged pins, ect.

 

OK, I cleaned EVERYTHING again. The TECA was a pain to get to, but its clean too now. attacked all the connectors with brake cleaner, a tooth brush, a hairdryer, and dielectric grease. also readjusted the MLPS as it was about 30 degrees out of alignment!
The truck drives and shifts better now (probably due to MLPS), and when it was cold I actually had overdrive! But after a 20 min drive I parked it at the store, and on the way home my OD was gone again. Pulled the codes AGAIN, and I'm down to one one! That damn 99 is still there, causing me to believe its the actual Solenoid pack. So, unless anyone has a better idea I'll be driving it to San Jose and asking the transmission shop to fix it, since it's only 4 months into a 12 month warranty! Thanks again for all the help guys.

 

well this is good.your narrowing things down.
so it's either the pcm,the wires,the banks trans command,one of these connectors in between,or the solenoid pack.

you line up the marks on the MLPS while trans is in neutral.
you didn't line 'em when you had 'er in park did you?

 

Haha, no, funny thing though, the tic mark was clocked EXACTLY to the park position, meaning the transmission shop lined it up, then slid the MLPS on while in park, and then TURNED it until it the bolt holes lined up, making it 30 degrees off of neutral...I couldn't believe they actually did it until I tested my theory and low and behold the tic mark ended up right where I found it when it was 30 degrees off! Needless to say I'm thinking less and less of the transmission shop with every passing day.