727 Transmission Help

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moparspares

moparspares

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I have read that there is a fibrous washer that goes on the rear planetary gears. I however have a 3 eared clover washer and a round flat washer. Are both of these used or just the one and if both the orienation would be flat washer against the planets and then clover washer.

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I have always seen the fibrous washer on the front of the output shaft, but a few days ago I took apart a non lockup mid 80s 727, the newest one that I have worked on and it had the three ear washer, there are three scallops that the ears fit into. I think this is a newer style. Interestingly this transmission had the most input shaft endplay that I have seen, over .100". It is possible that they also had more endplay and someone added the second washer to tighten it up.

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According to Carl Monroe Book see pic but goes onto say 1978 and up have a washer and plate but dont show a pic which is not helpful.

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d55dave said:
I have always seen the fibrous washer on the front of the output shaft, but a few days ago I took apart a non lockup mid 80s 727, the newest one that I have worked on and it had the three ear washer, there are three scallops that the ears fit into. I think this is a newer style. Interestingly this transmission had the most input shaft endplay that I have seen, over .100". It is possible that they also had more endplay and someone added the second washer to tighten it up.

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Ok so I am assuming I use the 3 ear thrust plus the steal washer according to Carl Monroe
 
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There is a thin race that goes between the 3-tab washer and the output shaft. I had a heck of a time finding one a couple years back, the factory P/N is 4329806. Superior sells a kit #K063 that has a few different thickness shims, you can use one of those to set endplay as well.
 
The three tab thrust washer was a running change. Not sure when they went to it. I think the output shaft shim was always round but they did use a fiber there and later years switched to the copper/steel version. I like to use the copper one, the fibers are always ate up.
 
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