Drag Race Transmission ChevyTH350V8 & 4.3L V6Non Lock-upReverse Shift Pattern6'' TailshaftHeavy Duty Sprag Assembly and DrumTransbrake TCI 312500 Features:Full manual valve bodies with full race clutches & bands allow for quicker shift timing and the ability to run higher line pressures than with an automatic shift transmissionHigher line pressure makes it more difficult for clutches to slip under high loadsOversized sprags & races (where applicable) increase holding capacity; steel hubs increase durability & strengthImproved lubrication system increases the amount of fluid sent to planetaries and internalsDesigned to handle up to 650 TQReverse shift pattern.