New Holland T8010 Manual page 1534

Section 55 - Electrical System, Controller - Chapter 4
FAULT CODE TRANS 24
The Transmission Clutches Are Not Calibrated
Cause:
Transmission clutches have not been calibrated
Solution:
Clear the fault codes and perform the calibration procedure.
If the fault code still appears after the calibration procedure is completed replace the Transmission controller.
55-4-7