Complete tear down and rebuild for my 4R70W and all has gone very smoothly. The only thing that has caused me some concern is at the very end when you go to install the pump. In videos I've seen they seem to be able to turn the input shaft rather easily by hand and also show some end play. After I install my pump, I can't turn the input shaft by hand, however I can turn the output shaft. Also, there is no end play.
I have completely disassembled this thing 3 times looking for an upside down bearing, too many frictions/ steels, anything that I could think of that would cause what I'm guessing is a "too long" of an assembly and have found nothing.
So I started taking some measurements and comparing to dimensions I've found on-line. Two measurements that have me confused; 1) from the last steel of the intermediate clutch pack to the pump surface of the case should be (according to Ford) 1.645, I measure 1.4375 which indicates that my pack is too thick/ high however when I measure the overall thickness of the pack, it is .0225" thinner than the the old pack that I'm replacing. 2) my measurement from the top of the reverse drum bearing to the pump surface is 1.6185 and have seen that it apparently should be in the 1.5130 range based upon the variety of the colored selective washers. This seems to indicate that the drum is "too low".

What am I missing?

Thanks, Kurt
Typed with two thumbs

 

What hard parts did you change?

 

Steels/ frictions/ bearings/ seals. No real hard parts.
Everything else checked out fine.

 

Either something has to be assembled wrong, or you're not fully seating some components. I could understand there might be an issue if you replaced some hard parts like a clutch hub.

 

I've tried to cast a wide net by placing my situation on 4 forums that have some very knowledgable and experienced members, many of whom have helped me over the years. One person pointed out that the #2 and #9 bearings are very similar and can easily get mixed up.
So I completely disassembled again to verify that I had those two bearing installed correctly, and they are in their proper locations. I'm still looking for any other suggestions.
Thanks

 

Did you ever find an answer to this? I can turn my 4r70w shaft by hand but i have no end play at all.

 

Yes and no. Or more precisely, I don't know yet.
I tore it all back down one last time and reassembled very slowly, double checking everything over and over. I must have done something differently/ better this time as once I finally installed the pump, input shaft turned much easier by hand and my end play was within range.
Two things though;

I don't know what was wrong to start with as nothing seemed obviously wrong in the last tear down

I don't have the tranny installed yet as I'm STILL building my replacement 300

 

Thanks. I ended up needing a selective thrust washer that was thinner. The one in it was .086 and I used the green one (.052) to bring within spec. Got it locally at Transtar for $1.95.

Good luck on your build.