727 transmission leak
Speedo, shift seal. Dipstick, pan.
Since I picked up mine in July I've replaced the speedo seal, the pan gasket, the selector shaft seal, the kickdown seal and the extension housing cover seal.
Speedo seal is a snap, bought the kit off ebay. Just pay attention to the dial marks when you reinstall.
The ext housing seal I couldn't source so I used gasket maker. Its tell-tale drip is off the tip of the bolt on the bottom of the crossmember. The rubber inside the cross member will likely be sopping wet from fluid.
For the selector shaft seal and kickdown seal I slid a bottle jack under the tailshaft and pulled the cross member. Lowering the trans slowly I could get to the top where the shift shaft protrudes from the trans case in order to clean all the oily grime off and disconnect the linkages. I replaced the seal by dropping the valve body as had been previously suggested, rather than invest $30 in a tool that may or may not work (or you may or may not have the clearance to make work). I didn't pull the valve body out entirely, just spun it slightly out of the way and zip tied it off to the pan bolt holes to support it. Once I had some clearance I could drive the seal out from the bottom. FYI the kickdown seal is on top of the shift shaft, retained by an e-clip and washer.
Selector shaft seal Napa part #: ATP 13308
Kickdown grommet/seal Napa part#: ATP 14582
Interestingly, the area around the dipstick tube has stayed dry this whole time (knock on wood).
