It should be possible to replace the lip seals at the input and output shafts by simply removing the yokes, without any further disassembly. Once the yoke is removed, just use a sheet metal screw and a pry bar to lever the seals out. Be careful where you put the screw so you don't deface a part number and your friendly NAPA store can probably cross-reference numbers to get the right replacement seals.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!