[Big Blue24]

On the driver's side of the tranny, just above the fluid outlet to cooler line, is the adjuster for the 2nd gear band. Loosen the 3/4" locknut, tighten the 5/16" adjuster nut till it's good and snug, then loosen it 1.75 to 2 turns and retighten the 3/4" lock nut.

To adjust the low/reverse band, you need to remove the transmission pan. Typically, this band doesn't need adjustment. If reverse isn't engaging correctly, or if the truck acts weird when the gear selector is in L position, it might need adjustment.