Only 10,000 mile warranty. I get the new pnp switch on Saturday. We'll see what happens

I have a 1995 850 wagon non turbo. Problem in no drive, reverse or park. Had the trans rebuilt 20,000 miles ago. Rebuilt the pnp switch no luck. Ordered a new one. Is there internal linkage that's excesable with out pulling the trans ??? Trans just stopped working after it was parked. No slipping no...