A/T - E40D Burned Overdrive Section

TRANSMISSION: E4OD

BULLETIN: # 080

SUBJECT: Burnt Overdrive

APPLICATION: Ford

DATE: November 1991

Burned Overdrive Section




A burned E4OD overdrive planetary may be caused by restricted lube oil feed in the stator. To check for a restriction, blow into the hole. Figure 1.




Air should come out of the orificed cup plug in the rear of the stator support shaft. Figure 2.

There is drain back valve assembly under the orificed cup plug in the stator shaft. The valve assembly may have melted if it was subjected to severe heat.




Thread a tap into the orificed cup plug, grab it with pliers and while wiggling it, pull it out. Underneath the orificed cup plug is the drainback valve. Remove it and inspect the end for possible damage. Figure 3.

If the valve assembly is damaged, stator replacement is required. The valve is not sold separately from Ford.

BULLETIN RECAP

^ If the overdrive planet is burned, check the drain back valve and orifice in the pump cover.