Won’t shift into 3rd gear

I did replace the axle seal on the front differential and three of The solenoids

Professional quality scan tool can monitor live transmission data during test drive - this includes all solenoid operations as well as other important parameters required for a successful diagnosis., There just ain’t no other logical way to do this - trial and error can be expensive.

Thank u for your advice

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Code reader says my throttle body mod is bad will that make it not shift