i have two questions.

1. assembling internals of case, i can get oil pump to go in if i leave the band out, but it stops about 1 3/4 inches if the band is in. Not sure why this is happening. Band is in its proper place, and positioned correctlly. Any ideas?

2. 1-2 shift spring in the valvebody is 1/4" shorter than in the book. I suspect it has lost its length due to wear not sure though. I have the ATSG book for the transmission and it has two pages with actual size of valves and springs. this is what i am using as a guide.
Where could i get a new spring?

Thanks

 

I cannot visualize how the band could get in the way of the pump unless it is shifting the entire drum assemblies into a strange position.

Have your already installed the servo? I suggest doing this before the pump so that you can see and confirm that the band anchors are properly engaged. You can then also estimate the servo end play which should be between 1/16" and 1/8".
This will ensure the band, reverse drum and input drum are properly positioned.

Also make sure the top of the reverse drum is slightly below the edge of the case tabs that position the pump. Remember the plastic washer between the reverse drum and pump. Generally you have to use transgel or vaseline to hold that washer onto the pump.

Sorry, I did not have a chance to measure the 1-2 accumulator springs for you yet and/or compare them to the ATSG book. transmissionpartsusa.com sells the outer 1-2 spring in a wide variety of tensions to firm up the shift. The inner spring is hard to find.

 

Thanks i finally got it in. It was the band causing the problem. It is a pain and wants to be in a specific position in its slot. took me about 6 or 7 tries to get it right.

I was just getting rather frustrated with it.

I haven't done anything with the servo. I already got the pump on. This transmission was rebuilt 1000 miles ago and failed because when i replaced the radiator, the fella that was helping me did not tighten up the fitting into the radiator properly and it created a leak when i drove it home 1000 miles. I got here and it was like a week later and the 3/4 frictions wrere burned up.

So mainly what i have done is clean the transmission thourougly to remove the black contamination from it, replace the frictions, and am decontaminating the valvebody.

I am not sure what your referring to on the servo. The fella that rebuilt the transmission before is my uncle and he's a master mech, been doing it for 50+ years.

All the updates and upgrades have been done and he put in a corvette servo into this one.
I suppose i need to open up the servo and clean it cause it probably has black crap in it as well.


Check did that. It was the first thing i made sure of when i slid it into place. It was just below about the thickness of the plastic thrust washer.


Thats kool, i've been trying to get an answer on my pump problem for 3 days now from various boards and your the first one to answer. As luck would have it i sat down this morning took it back apart and piddled with it til i figured out that the band was dang finicky in its positioning.

I'm waiting on a shop in wichita to call me back and tell me if they have a 1-2 shift spring. I can't buy them from Gm. they won't sell it outside of a kit. I don't need a kit but they want to make sure they get top dollar on parts that you don't need.

I'll update this when i get further along.

 

Glad you finally got the pump installed.

For your Q about the springs - in the 1-2 accumulator I measure the stock outer spring with a length of 1.35" and the inner spring 1.38".
I have seen two different 1-2 accumulator housings with different internal depth. My 2009 definitely was shallower.

You mentioned "ATSG book ...two pages with actual size of valves and springs". Those are valve body springs, not the 1-2 accumulator.