Inspection of a 904 torqueflite

I finally got around to getting the line pressure hole drilled. The measuring was good and lined up perfectly with the valve body mocked up.

I drilled a 1/8 hole in the back of the case to lube the sprag clutch better.

And then drilled a decent sized hole for a 1/8th pipe thread plug or a vent to be put there and possibly block the vent in the pump. I know this was unnecessary but while I was at it and had aluminum shavings ll over the place. I figured to just get it all done at once whether I was gonna use it or not.

I do wonder though. Why do people block the pump vent and open up the top of the case or put it toward the back near the governor.

Why not just have both vents and vent out pressure and heat from two locations? Either way.....I don’t think I’ll use it but it’s there.

I haven’t had a chance to drill the valve body yet for the Transgo. Been busy with work.

But as said above.
I decided to go the more tf1 route and go with the largest of those.

The .140

Hopefully it will be more of what I’m looking for. I opted out of the shift command mod.

I should be drilling the separator plate tomorrow and start the process of putting this back together.

It’s been out for way too long. Longer than I expected by far but other stuff gets in the way. The book by Tom hand and the other book by Carl munroe are both excellent. I recommend both of them.
I am surprised that you claim to have drilled the hole in the case for line pressure adjustment with no mention of welding.
I too did that mod but it required adding a piece of aluminum to the case by welding to get the hole in the right location.
The reason some builders block the vent at the front is usually because it is required if using a transbrake. The instructions with some brakes requires a small bleed hole to be drilled in the front drum under the piston. This hole will allow fluid to spray out of the hole at high pressure and it will spray fluid right at the vent in the pump. Plugging the vent and moving it to the rear allows the trans to still be vented without having a leak.