4L60E 4x4

hey Guys I'm looking for a 4L60E 4x4 OS for my 12200411, need to do a transmission segment swap.. does any one have this OS?

I have the express van file on a L31 1996 Vortec 5.7 and need to do a segment swap to see if my 4 low is going to work.
since the express van is not a 4x4, many had told me that this might solve my 4l not shifting. My 4 H is fine it shift ..but not the 4L it revs to 6k


if any one has any input It will be apreciated!
any one that has done the swap to the 12200411 and using the OS of the express van, as experience the problem with the 4L not shifting???

-Gilbert

any one?