Stuck in Germany

Im stationed over hear in Germany with a 2003 F-250 (7.3L Diesel). My wife was driving it back and the O/D light started flashing and making a weird noise above 40 mph. Long story short I have had it in the Ford dealership for 2 weeks now. Im not 100% sure its the tranny. The Germans don't often see these trucks and don't work on them much. I just spent 600 dollars on computer checks with them and all they can tell me is its something in the tranny (90% sure). The only codes in the tranny thats coming up is a hydraulic code & 4x4. Before i took it in i checked the pulleys changed the power steering and no difference. The truck shifts just fine.

Also my truck is haveing a terrible time starting. The mechanic told me it was an hpop and a valve that was bad, but he wouldn't tell me what one (i took it to another mechanic previously and he said it was a computer thing with my glowplugs) I asked the Ford mechanic if i could get the codes from him for a second opion back in the states before i bought a transmission. He told me to take my truck and get out of his shop. So i paid 600 dollars for nothing to show for. If you could help me in any way please let me know. Parts and labor is very expensive over here and its very difficult. All in all i don't trust the mechanics (and the knowledge of this vehicle) and am at a stand still of what to do. Thanks