Roxydog1

My lightning will not accelerate when floored to pass traffic. The transmission kicks down , RPM's go up but truck stays at steady speed. On a grade the same results but losses speed ! The trans fluid it translucent red still and does not smell burnt. It is also in the cross hatched level. Normal driving it shifts out fine and I can gain speed as long as I dont floor it . My other two f-150 work just fine in this area. Any help is good !! Thanks , Ron