Do you recall the actual code number you retrieved.
In the picture below can you tell which solenoid you replaced.
Do any of these codes fit.
All of which are solenoid codes?
Any other shifting issues like no 2nd gear or no engine brakeing in manual 2nd or 1st?
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Here is what the codes mean.
According to the picture above you did replace the correct solenoid. Since 2nd and 4th gear use the same parts and 2nd works then you must have a electrical issue between the solenoid and PCM. You will need to perform some electrical tests shown by clicking here to see if it s wire fault or PCM fault.
You would get a failure code for other solenoids if found faulty. SSC is another possible faulty solenoid for no 4th but a supporting code was not retrieved.