Easiest 727/904 rebuild thread...
Okay so first thing I pulled out was the first thing in line the pump. It looks horrid... Now had I just been giving this transmission a refresh and it was previously in working order in recent history and stored correctly I probably would skip a lot of this process and just flush it out real well with cleaners turning it pumping it and flushing it out real well with lubricants. Just to get the contaminants out of it.... The 727 in my power wagon was actually a good running transmission that just broke the reverse band so I just cleaned it all out and put new seals on it and stuff and let it run. And it's ran fine.
This one on the other hand as you can see in the pictures is pretty damn rough. It's going to need a complete overhaul... Which is good for this thread.. the first thing I did was take off the two ring seals on the inside snout and and pulled the spacer off as well and laid them out in order. I flipped it over to the input side and plucked the front seal out and mangled it a bit but this is no big deal cuz we'll put a new one in. Also laying on the table you'll see the big rubber seal that goes around the outside of the pump itself. And of course the gasket on the inside outer ring.
A tip I got from watching a factory rebuild video was to put a scribe across the pump gears to know where to mesh them together and know which side faces up..
I had to bite the bullet and go down and get a new brush wire brush. I said to myself here we go Ace hardware they're going to want four or five bucks for it and I was wrong they wanted seven! Damn it!!!...
Okay so first thing I pulled out was the first thing in line the pump. It looks horrid... Now had I just been giving this transmission a refresh and it was previously in working order in recent history and stored correctly I probably would skip a lot of this process and just flush it out real well with cleaners turning it pumping it and flushing it out real well with lubricants. Just to get the contaminants out of it.... The 727 in my power wagon was actually a good running transmission that just broke the reverse band so I just cleaned it all out and put new seals on it and stuff and let it run. And it's ran fine.
This one on the other hand as you can see in the pictures is pretty damn rough. It's going to need a complete overhaul... Which is good for this thread.. the first thing I did was take off the two ring seals on the inside snout and and pulled the spacer off as well and laid them out in order. I flipped it over to the input side and plucked the front seal out and mangled it a bit but this is no big deal cuz we'll put a new one in. Also laying on the table you'll see the big rubber seal that goes around the outside of the pump itself. And of course the gasket on the inside outer ring.
A tip I got from watching a factory rebuild video was to put a scribe across the pump gears to know where to mesh them together and know which side faces up..
I had to bite the bullet and go down and get a new brush wire brush. I said to myself here we go Ace hardware they're going to want four or five bucks for it and I was wrong they wanted seven! Damn it!!!...
