Case Bushing Wear and Sun Gear Bushing Wear

If case bushing wear, sun gear bushing wear, excessive wear in the I.D. of the center support, output shaft bushing wear (located in front of the output shaft), and/or low one-way clutch malfunctions are noted at teardown, replace with the following upgraded components in conjunction with normal service procedures.

^ Ball Bearing Center Support Kit (F4TZ-7A130-B).

On transmissions built before 3/30/92, the following components should also be replaced:

^ New balanced low/reverse clutch hub (F3TZ-7BO67-A).

^ New unitized plastic cage low one-way clutch (F3TZ-7AO89-A).

^ New reverse planetary with minor diameter fit (F2TZ-7DO06-A). When the reverse planet is replaced, thrust washers numbers 10B and 11 must also be replaced.

^ New case bushings of harder material (F2TZ-7025-A front and F2TZ-7025-B rear). Refer to the new Front and Rear Case Bushing Replacement Procedure in this article.

^ Overdrive planet and input shaft kit (F4TZ-7B446-B)

^ New sun gear with harder bushings (E9TZ-7D063-A).