2005 Dodge Neon Transmission Stuck in Second Gear

2005 Dodge Neon stuck in second gear. My car was leaking transmission fluid because of a bad seal around the pan. A couple friends and I changed the transmission fluid along with the seal and the filter. Soon after than the transmission began to slip a little occasionally. When it would do this I noticed that the speedometer would go down during these moments. It eventually got to where it would just stay in second gear and wouldn't shift any higher. It would be fine in the morning and shift normally but the longer I drove it the worse it got. I was told to replace the input and output speed sensors. I did this and it stayed in second gear all the time. It wouldn;t even run right in the morning. I put the old ones back in and still had the same result. Second gear all the time. It does seem to occasionally start out in first gear then roughly switch to second gear. The speedometer never works now. Here are the codes.

p0016
p0501
p0700
p0344
p0340
p0736
p0841
p0731