2005 chrysler 300c hemi intermitant goes into limp mode wiyh fault code u0103 i have replaced the complete stick shift but is still the same problem ,has anyone any ideas Mike.

run a scan for the trouble code

Here's the link and I'm sure you will get the solution of your problem
Jeep Grand Cherokee Service Repair Manual 2005 2006 2007 2008

Get an OBDII reader and connect to see what error codes you are getting. Limp mode can be caused by many different things including problems with the transmission.

U0103 is ''loss communication with gear shift module'' This could be the can C bus failure, or PCM, or electronic shift module. China OBD2 car diagnostic tools wholesale on CareUCar

I can't find the exact brainbox of my Chrysler 300c Hemi 2005 model and i need to replace my own that is spoilt

Have to use Google for vehicle codes
OBD -- P1521 etc
Most Generic Codes are PO
Yours are maufacturer specific for the most part

loose or dirty connection at the transmission harness maybe..

ello
The engine and transmission in this cars drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant teperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL THE DIAGNOSIS & TESTING IS COMPLETED.

it sounds like the transmission has gone into what they call limp in mode which indicates a problem with the transmission.you will have to have a scan tool put on it to pull the code out of the tcm(transmission control module) which will turn on the engine light.at the same time it may show a code for the temp control.

yes. If the rack is not held ,when you try to turn the rod you could bend the rack.With the pin out it doesn't take much to hold the rack,loosen the end with the rack "turned " so the rack is retracted into the housing,not sticking way out .