Mitsubishi: trans codes, transmissinon, TCU

Question
my brother has a 2001 mits gallant. ever since he got it, it has not been running properly. the service engine soon light came on and the car goes into "limp" mode.. i put an otc scanner on it and it gave me the following OBD-II codes:  p0765-shift solenoid D malfunction,  p0760-shift solenoid C malfunction,  p0755 shift solenoid B malfunction....  also it gave me the following OEM codes:  42-second not synchronized,  46-R not synchronized,  44-fourth not synchronized.  what could cause these codes to come up and what can i do to correct this issue?

Answer
Unfortunately, with multiple codes like this and the vehicle running in its "safe mode" it is probably a sign of impending transmission failure.  Sometimes an erratic TCU (Transmission Control Unit - Tranny Computer) can cause a misdiagnosis of these codes too.  That is very rare.  The electronics inside the TCU and the transmission sensors have improved significantly over the past models...  I would lean towards a partial transmission failure.  Definitely a mechanical problem.  You could possibly take it to a transmission shop who could repair the transmission for about 1/2 the price of putting in a new one.  

First thing is first though, make sure that the transmission has fluid in it.  If the fluid drained out because of a hole in the pan... or gasket leaking... I have seen transmissions act up in this manner.  If it is full and the fluid looks good... and isn't black/brown or foamy/bubbley you'll want to take it to a transmission specialist, as soon as possible, before complete transmission failure which will cost significantly more to replace rather than repair.