91.5 beater

Is this mod gonna hurt my tranny in any way if i just use the lockup at desired speed 2nd gear locked for 30mph, 3rd gear locked for 40-45mph and overdrive of couse will lock on its own for highway speed, i just want the torque converter locked at cruising speed, and i know not to let it shift through the gears with it locked, i NEVER hotrod my truck around i drive it like a granny so i didnt do this mod for more power to the wheels i did it for better mpg

jpajax

Will up shift but will not down shift. You have to be careful not to accelerate hard with tc locked. It is one of the best mods I have done it will can control your transmissions temperature by locking tc.