A/T - Planet Gear Service Interchangeability

87ford11

TRANSAXLE - AUTOMATIC - NEW SPLIT LONG Article No.
PINION PLANETARY GEARS - SERVICE 87-2-14
INTERCHANGEABILITY TIPS


FORD 1981-86 ESCORT, EXP; 1984-86 TEMPO; 1986 TAURUS

LINCOLN-MERCURY 1981-86 LYNX; 1984-86 TOPAZ


ISSUE: Design changes to the automatic transaxle planetary gear were made on late 1986 units to improve intermediate gear noise. The three basic design changes are:

^ The outer, long pinion, is divided into two short pinions and the ring gear is extended to mesh with both of the outer pinions. This arrangement effectively allows the compound planetary gear set to act as a simple planetary gear set in second gear.

^ The planet carrier assembly is "piloted" directly in the transfer housing bore to make sure of uniform meshing and gear action of the planet gears during rotation.


^ Final drive input gears were shorted to allow planet carrier to pilot into the transfer housing.

Some components used in past model years may appear to be similar, but are not interchangeable with the current split long pinion design.

NOTE: The transaxle build date and model number on the identification tag located on the main control cover is needed to determine the correct component design level.

ACTION: The application chart below lists the attached components and design level.

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"


Design Level

Component Coarse Pitch Fine Pitch Split Long Pinion

All models built All models built All models built
1981 thru from 1/14/85 after 7/13/86
1/13/86 thru 7/13/86
(except model and all PMB-C

PMB-C3)

Gear assembly - transaxle 1st-3rd * * *
reverse (7N107)

Drum and sun gear low/intermediate * * *
(7A626)

Gear assembly - intermediate reverse * * *
clutch ring (7F348)

Planet assembly - transaxle (7A398) * * *

Input gear (7F342) * Same as coarse *
pitch

* Denotes unique component for each design level.


NOTE: To service a past model with a split long pinion gear set, the final drive gears need to be updated with the proper level of


3.26 FD gears and a split long pinion input gear used.