Bad transmission speed sensor no check engine light?

So I just replaced both o2 sensors & the governor pressure sensor & solenoid & my check engine light keeps on coming up for the govenor pressure sensor & solenoid! Now how is that possible? I changed them correctly, do you have to reset your jeeps ecu after replacing sensors? If so how? & I have all the symptoms of a bad transmission speed sensor but no code for that, just the governor pressure sensor & solenoid! Please help! 98 jeep grand Cherokee limited 4.0L zj automatic transmission 42re. Ohh & do I have a vehicle speed sensor & transmission speed sensor? Or are they the same thing?

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