Does the 1-2 Accumulator Require 1 or 2 Springs?

[Smoot178]

I'm replacing my 1-2 accumulator.  4L60E 2005.

 

The old accumulator came out with 2 springs: one small and one larger.

 

The new accumulator (ACDelco) came with only the one smaller inner spring.

 

See attached.  New on left, old setup on right.  Should I be putting the old large spring in or not?

[Smoot178]

After reading this:

 

http://www.autoserviceprofessional.com/article/92759/servicing-a-harsh-gm-shift

 

I am not going to put the large outer spring in.  Since it came from ACDelco with only one spring, I can only assume, without any further information, it should only have one spring.

 

Wish me luck.

[Smoot178]

The results are in.  The 1-2 accumulator replacement with just one inner spring was successful.  Shifts so smooth you almost can't even tell.

 

If anyone comes across this thread with a hard shift from 1-2 at low acceleration but shifts normal with hard acceleration, replace your 1-2 accumulator.