do the 4r100's have a vent?????????

 

Yes, the Lightning model has a "jiggle cap" on the very top of the case at the base of the bell housing, just over from and aft of the Turbine Speed Sensor. If you happen to take the tranny down, the "Right Angle Vent and Tube" from the SuperDuty can be used to replace it, which is harder to clog if you go off roading, or drive in the desert a lot, but otherwise is not worth doing, even if you do have it down.

Hope this helps,

G