If you're going to use this for racing, you'll want to add the 786218 Needle Bearings on to the axle ends, inside the housing. Much better durability and less friction.
And...the 691218 Service Manual is available in print format, if you don't want to have to refer to your electronic device when you're working on the transaxle.
Respectfully,
Rodney Rom
Rom's Reworks
Butler, MO