Will not shift our of D, R56, 2008 S turbo
 

new trans.. will not shift our of D1. code is P0974 Shift A solenoid High.. cannot find where it is?? can i change it
When i start it .. put in R , it actually JUMPS .. like too much pressure in Tranny
we checked both connectors.
but it seems that it is not getting signal to shift. .OR Shift A solenoid is saying DO NOT shift out of D1 . or DS says M3 .. will not get out of M3 in DS mode.
thanks for any help you can give me. this is just puzzling.

Did you install the new transmission yourself or did a shop do it? Not too well versed on this code, but maybe see if this info might help you out: P0974 – Shift solenoid (SS) A -control circuit high – OBD2 Trouble Codes