P700 No speedo, no shift

[Xlerator]

2016 700 with no issues until speedo stopped and would no shift out of 1st. Did the usual check of connections and grounds and all of a sudden it’s fine. Next day same issue. Same check with no luck. No codes, runs fine. Any info would be great.

 

[Glock21user]

2016 700 with no issues until speedo stopped and would no shift out of 1st. Did the usual check of connections and grounds and all of a sudden it’s fine. Next day same issue. Same check with no luck. No codes, runs fine. Any info would be great.

I wish I could offer more than a crap this is where I would start sorta thing.
On these machines the rear diff speed sensor controls to some degree both of your issues.
I would start looking there.
Sticks and such have been known to get up in and damage wiring and break things
Good luck.