my 727 build thread

ok guy, I made a dumb rookie mistake. on the tail shaft extension housing there is a small tab cast in to the housing on the bottom of the gasket mating surface. this tab is meant to secure the reverse servo pivot pin in the main housing. well, I ground it off when i was prepping the housing for powder coat. I didn't know that the small tab had a purpose. with out the tab the reverse servo pin could walk out of its bore and drop the linkage. this is highly unlikely but id rather not risk it.

this however led me to a pretty cool discovery. the 727 has several tail shaft extension housing variations. One of which is a heavy duty housing used in stock performance vehicles, trucks and vans.

this is a light duty housing, the one i screwed up.



notice the indentations around the end of the housing? the housing is cast thinner.

this is a heavy duty tail housing




notice how the housing has much more material cast into it? no indentation at the end. this has a much thicker housing at the end where the drive shaft yoke enters the trans.

I have one of these on order from A&A transmission. This was an expensive time consuming mistake but in the end i did learn something. just thought i would pass this along.