This valve body kit deals with these problems: Code 1870 Delayed engagements Slide bump 2nd & 3rd 3-4 clutch burn-up Help for worn plates Provides more lube oil Regular and Heavy duty applications Improves overall transmission performance Includes PWM Powervalve to correct code 1870 problems and still maintain normal computer strategy of the converter. Includes oversized checkballs to give new life to the original worn separator plate.