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Transmission stuck limp mode and won't shift out of first.

Tiny
SHAWNFRED10
  • MEMBER
  • 2005 DODGE NEON
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 155,000 MILES
We changed the shift soleniod in my friends 05 neon. Then changed the transmission fluid and filter. After that it doesn't want to shift out of first. Code gave was p0700 which is a general transmission code. For the life of me I can't figure out what is the cause. It worked before we did this so apparently we disturbed something. Any ideas would be greatly appreciated. We also changed the input/output speed sensor. And the spedo won't read swell.
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Wednesday, March 9th, 2016 AT 6:28 PM

4 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,871 POSTS
Why did you replace all these parts if there was no problem?
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Wednesday, March 9th, 2016 AT 6:35 PM
Tiny
SHAWNFRED10
  • MEMBER
  • 3 POSTS
I should of specified the reason lol. The engine light was on and we had the codes that said these were issues. We recently had an exhaust leak fixed and the transmission was acting up as well. It would not shift as it supposed to sometimes but usually fixed itself after a few seconds or so. So we replaced said parts hoping it would fix the issue. But now it doesn't shift at all. No more codes nor engine light is on. But the last thing that coded was the p070"
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Wednesday, March 9th, 2016 AT 6:48 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,871 POSTS
If it's stuck in second gear, that's "limp" mode to allow you to drive slowly to a repair shop without needing a tow truck. There should be some diagnostic fault codes in the Transmission Computer. Code 700 is read in the Engine Computer and just means there are other codes in the Transmission Computer. If you are using a simple code reader, you may need to get a scanner to read codes in the other computers. Most code readers only read Engine Computer codes.

As for the sensors, check that no pins got pushed over when the plugs were connected, and look at the terminals in the plugs to see if any are stretched or deformed. If the speedometer isn't working, one of the speed sensors isn't providing its signal, and that will put the Transmission Computer into limp mode.
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Wednesday, March 9th, 2016 AT 7:11 PM
Tiny
SHAWNFRED10
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Ok. Will def look at it in the morning. The speedo isn't doing anything so hopefully that's the case. Thank you. Will provide feedback when I check it.
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Wednesday, March 9th, 2016 AT 7:24 PM

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