The #1 speed sensor broke off inside the transmission.

I ended up removing the cove r plate on the front differential. All of the pieces were there. Now I need to buy a new speed sensor c/w the plastic turning gear but very doable . The parts guy figures the sensor musy have been defective and will replace it for free but I have to put it in.

Sounds like fun.......not! Good luck , glad you got it under control.