5R55N Archives - Transmission Digest
Valve-Body ‘Kibbles & Bits’

In all the years of building transmissions, I think the worst thing that could happen is having the R&R guy, manager or owner come back after a road test and tell you, “It’s not working.” All of a sudden you get this knot-in-your-stomach feeling that makes you wish this were not really happening.

Morning Sickness – Well, Sort Of

At ATSG we have received several calls on the 5R55N/W/S transmission in the new Lincoln LS, Jaguar, Ford Explorer or Mountaineer concerning a complaint of delayed or no engagement. The condition occurs most often during first morning startup, under extreme cold-temperature conditions, and the transmission may engage if the throttle is snapped wide open.