Hi,
If it was working properly, are you sure the wiring wasn't an issue? I've seen a breakdown under the insulation causing problems. One minute there is a connection and movement causes that to change.
Did you check all connections and the wiring when you did the work?
If the trans was working correctly, there is an issue either with a bad solenoid or shift valve is stuck. This repair is much cheaper than a new trans.
The code you provided, 45-06 (P1734), can be either with solenoid B or C. Your last post is the first I saw it. Do me a favor. Take a look through the diagnostics below and let me know if you are comfortable performing them. You will need a scan tool that can actuate solenoids.
Note: The first pic below shows the definition of the code, pics 2 - 4 are the diagnostics, and the last pics are advanced diagnostics.
Let me know. And again, I don't (at this point) feel the transmission is bad.
Take care,
Joe
See pics below.
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Monday, August 30th, 2021 AT 5:19 PM