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I have a 2000 Chrysler 300M with about 100,500 miles on it. The other day as I was leaving my house and shifting from reverse to drive, tranny kind of shuddered and then shifted to drive. A minute or so later, the check engine light came on and the tranny would not shift out of second gear. I pulled the codes out of the computer and they were as follows, P0700, P0715, P0733, and P0731. I trired to do some research on them as to learn what was actually wrong with the tranny, but did not really find what was wrong. But what I did find, suggested that the input speed sensor is bad. Is this correct? How hard is it to replace? Where is it located? Any pics of location or breakdowns available? Any help or information is greatly appreciated!

Thanks
 

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Welcome to Allpar. Disregard P0700, that is just the PCM saying that faults are stored in the TCM.
P0715 could cause the other faults and should be addressed first. It may be the only problem. It is the input speed sensor.
P0720 would be the output speed sensor.
It is screwed into the drivers side transaxle case by the dipstick. A 1" socket should work once the connector is off. It can be tight up in there. Let the exhaust cool.
You have the 42LE transaxle. The input and output speed sensors are threaded differently so they can't be mistakenly swapped.
See input speed sensor (#4) here: 80a826a5.gif
(#2 is the output speed sensor. It also drives the speedometer).
Fluid and filter changes should be done occasionally for maintenance purposes. Use ATF+4 only in the transmission section.
The differential portion uses SAE 80W-90 hypoid gear oil and has a drain and fill plug.
 

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After reading the responses and doing more research on my own, I decided to replace the sensor myself. I went to my local Chrysler dealership and got the required sensors. I ended up replacing both, input and output. I figured, I'm already doing one, so I might as well replace the other at the same time. It would also eliminate any guess work as to which was the faulty one. Even though everything I read lead me to believe that the input sensor was the problem. They were relatively inexpensive. The part numbers are as follows 4800878 (Input) and 4800879 (output), I paid about $50 for both. You can also get them from most part houses too, however, after reading about these issues I was lead to believe that the aftermarket sensors fail more often than a factory one. Not to mention that they aren't that much cheaper than a factory one, at least not in my area. Probably $5-7 dollars cheaper. Since I don't like to do things more than once if I can help it, I went with the factory ones. Just needed a 1" deep well socket, swivel joint and a few extensions to get the job done. Took less than an hour from the time I put the car up, till I took it down and I even changed the oil as well!!! I will say, that this job is best done with the exhaust cold!!!! Otherwise you might get burned. It's a tight fit for someone with big hands such as myself. But all in all it was an easy job!!! So thanks to everyone for their input and suggestions. It sure makes it easy!!!!!!! Thanks again!!!
 
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