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bruce, you don't know what you're talking about, any 727 518 904 back to 1966 can be made a lockup with the reaction shaft support, input shaft and valve body. You could go back to 1962 (59 or 60 for the 904) but the cable shift valve body would be hard to come up with.
txs wrote:if you wish to make your 518 a lockup, get a second gen flywheel housing and starter. for the tranny you will need a lock-up input shaft, a lock-up reaction shaft support and a lockup valve body. Between engineering changes the only difference between a non lockup and lockup reaction shaft support is one ball staked into the cast iron part. Indeed if you went to most tranny shops and wanted a reaction shaft support they will ask if you need 2 ball or 3 ball support. I believe you could use any truck lockup valve body , just check under all the covers for different colored springs and use the diesel ones if they are different colors. There was only one valve body casting for rear drive apps from the time period we are interested in. NEVER mix and match the steel (separator) and transfer plates unless you know what you are doing, that's where you will get in trouble. Oldest,the case work would be for trying to make a 727 diesel tranny into a lockup, they never made the 727 valve body in an electric apply version, they were all straight hydraulic. I still think you could use the 904 valve body as it was a solenoid controlled setup, but the 904 body will not bolt to the 727 case, the solenoid hits. So some work would be in order to use that deal.
cmann250 wrote:You still won't have the double wrap rear band with the 518. I don't know if you can swap levers and get the double wrap set-up or not. Goerend won't deal with 518s because of the rear band, so I'm told.
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