You have a coefficient of friction problem, B3 clutches are to aggressive, coolant contamination, dirty or worn transmission fluid, worn B3 clutches.

Check the fluid level and condition, if clean, not brunt, not strawberry looking (water). The less expensive attempt to fix this problem is a transmission fluid flush, if it doesn’t work the Tran’s needs new B3 clutches and nitrated steels in a 722.4 transmission.