STOP DRIVING VEHICLE IMMEDIATELY TO AVOID TRANSMISSION DAMAGE!
Transmission slippage is extremely dangerous to the transmission and can destroy the clutches quickly. Do not drive the vehicle with a slipping transmission or while slip codes are shown.
If your transmission doesn't have a Input Shaft Speed Sensor, then slip codes can also be triggered by a slipping torque converter clutch. For more information about this, please contact BE Controls Tech Support.
Check to make sure a valid line pressure curve is being used in the controller's calibration and that all settings have been set correctly.
The picture below shows an example of a proper line pressure curve.
(The screenshot above shows a normal curve with all other lines hidden. The above example is of the Quick 4.)
For the Quick 1, the line pressure curve is displayed in units of solenoid current with an idle value of approximately 125 and a WOT value near zero.
For the Quick 4, the line pressure curve is displayed in PSI of line pressure. So a curve begins at approximately 60psi and grows to about 200psi as throttle is opened.
Since the line pressure curve goes in opposite directions according to controller version, it is VERY IMPORTANT that you don't confuse them.
Also, the Quick 4 allows line pressure to be adjusted individually for each shift. So if only one shift is harsh, check the line pressure curve for that shift.
Look over the example calibration files to make sure your line pressure setting is reasonable.