So I have purchased a 1 owner srt6 with 30,000 miles, couple of little door dings for a very good price in limp mode. The car has been in a Chrysler dealership for 18 months with no joy on the repair.....I thought I would take a chance.....so firstly it started for about 3 seconds, traced this to a bad fuel pump connection in electrical box under hood, wired fuel pump direct and now it runs great,,,,now the limp mode problem to deal with....changed the conductor plate and filter with genuine parts and refilled with a German transmission fluid....no joy,,,,read codes, p0370, incorrect gear ratio,,,,long story short I went and bought a Mercedes code reader and have now changed a solenoid with a direct replacement and it worked great for about 5 minutes changing gear as it should until we tried manually shifting by tapping the gear leaver, went straight back into limp mode.....although solenoid was correct part number, the numbers on the top of the solenoid are different, I am being told this solenoid is used in several cars and although they have the same part number, the numbers on the top refer to different cars which is some sort of gear ratio thing? Also I will tell you I have changed the electrical connector plug and checked the module in the passenger footwell.. Can anyone give me a few ideas guys please.....don't think the transmission is shot as it worked great for 5 minutes.....����������. Slagburger@hotmail.com is email address , and phone number just incase you wanna ask me anything and it's easier to call is 8632589789, I could also call you right back on my phone....many thanks in advance