Well, a 97 doesn't have a shift module it has a voltage coded switch. Although many dealer techs like to replace the whole thing (which is the only way with a module) the shifter assembly can be disaasembled and just the switch replaced on the cars that have D,4,3,2,1,. Cars with modules have -D+
I would be real tuff on any tech who doesn't know about the control pressure spring though. First of all it is just so easy to check. All one has to do is remove the pan and pull off the front valve plate. The
VB does not need to be removed or disassembled.