Home Bronco TSB Summaries Recent Updates Gallery Submit A Link Unique Visitors: 282897	FORD BRONCO -> TRANSMISSION, TRANSFER CASE, DRIVE SHAFT -> Automatic -> E4OD -> Forward/Reverse Sun Gear Service Information TSB 94-05-15 for 94 Bronco, Econoline, F-150-350 WELCOME to MIESK5's BIG BRONCO LINKS This is a Ford Bronco, Truck & Van Technical, Parts & Vehicle Classifieds LINKS site developed by the MIESK5 Family and is not affiliated with the Ford Motor Company in any manner. Although we initially developed this site for 78-96 Big Broncos, information in many Links also applies to Ford Trucks, Vans & Cars. Select A Link: Forward/Reverse Sun Gear Service Information TSB 94-05-15 for 94 Bronco, Econoline, F-150-350; "...There are two different forward/reverse sun gears in production. One type requires a retaining ring and the other does not. The retaining ring is used to hold the input shell thrust washer in place on the input shell during assembly. ACTION: Some E4OD transmission have been built with a forward/reverse sun gear that does not require a retaining ring. The sun gear has no groove for a retaining ring, Figure 1. These transmissions are identified as model PRA-FA12, serial number 00157935 thru 00158019. If internal transmission service is required for these units, replace the forward/reverse sun gear with the current service sun gear with retaining ring groove (E9TZ-7D063-A), Figure 2 and retaining ring (377300-S)..." read more Source: by Ford via thedieselstop