The B&M GM 4L60E PreRunner/Trail automatic transmission is for use with Chevrolet LS based engines. This transmission features a manual/forward valve body and includes a deep, cast aluminum pan. Internal components include a beast sunshell, reinforced input drum, "Billet" Corvette 4th gear servo, all new solenoids & wiring harness, 29 element dual cage sprag, all new high performance friction plates, and 8 Count 3-4 Friction Pack with Koleen steels. Max 550 HP / 450 Ft/Lbs. Intended for off road/trail use. For use on LS engines. Does not replace 4L60 (manual shift model). Transmission shipped without speedometer driven gear or housing.