The auto gear box will not go into Drive, 1st & 2nd work & will kick back to first if needed but will not go into Drive or O/D.

Started after being stuck in a bog hole for a few minutes.

Last time this happen was it was a faulty TPS, replaced the TPS & reset the ICU.

This time I have replaced the TPS & reset the ICU, idle has returned to normal but will not select Drive.

Ideas?

Thanks Hunno