Wrench light on 2010 Forester 3171DS. Stays in 3rd gear.
On startup, starts out in 1st gear, shifts to 2nd, then 3rd. Wrench light comes on (along with check engine light). As long as engine stays running transmission stays in 3rd. Starts in 3rd from stop thereafter. Manual downshifts are ignored. Goes into reverse OK from stop, but goes back into 3rd in Drive. Turn ignition off, restart, wrench light clears, and trans starts in 1st again. But once in 3rd, that's where it stays until engine off.
Disconnected negative cable from battery and shorted across negative cable and battery positive to drain capacitors as advised. Cleared check engine and wrench lights, but they come back on first 1st-to-3rd sequence.
6.8L V10 with Tow/Haul (transmission code "T" (TorqShift?))
Any advice? Thanks!