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Chrysler Repair/03 stratus 2.4 auto: trans code 1790

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Question
Have code P1790 , fluid ok , level good , no reverse gear . can this be a valve issue .

Answer
Hi Geoffrey,
That code is a speed error code (the input and output sensors don't agree that the ratio is appropriate for any one of the gears). It should have a second code stored with it, so if this was not found by means of a plug-in code reader I would suggest that you get such a readout at a nationwide auto parts store such as Autozone (often for free) or from an independent shop which likely will do it for under $40. Let me know that second code number.
There is a code for the reverse ratio being wrong (0736) and were that the case the best possibility would be something to do with the solenoid/pressure switch assembly which can be changed out without removing the transmission. Otherwise it involves removing the transmission to deal with the reverse clutch, etc.
But get the second number and I can tell you the possible causes.
Please read the PS below and respond to it.
Thanks,
Roland

Chrysler Repair

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Roland Finston

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Get a Free Fast answer to your repair question about a Chrysler/Dodge/Plymouth car, minivan, SUV, or truck. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty. This free troubleshoot advice forum helps you diagnose faults, minimize repair costs or do-it-yourself.

I answer questions seven days a week and respond to you in about 30 minutes. "Maxed Out" means I am answering another question, briefly unavailable, or asleep overnight, so try again later.

I have do-it-yourself experience (50+ years) and a library of 100 1982-2012 Chrysler factory shop manuals and 20 multi-manual Chrysler Corp. CD's.

I was voted "Top Expert" 2010-2015, here at AllExperts, and have answered 20,000+ questions.

Experience

Five decades as a 'do-it-yourselfer' on domestic and imported cars.

Organizations
Yahoo Autos Group called The Chrysler Lebaron Club (co-moderator)

Education/Credentials
Advanced degrees in Physics/bruised knuckles

Awards and Honors
"Top expert" of 2010, 2011, 2012, 2013, 2014 and 2015 here at Allexperts. Quickest "average response time" at Allexperts (currently no. 1).

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