Ended up changing both the shift position sensor and transmission output shaft speed sensor. Machine is up and running as it should for now. Apparently, this is a very common problem with these Liebherr loaders. Deere, Liebherr and Dana/Spicer are actively trying figure out why the failure rate of these two sensors are so high. In the mid-west, Deere has a “special allowance” to aid customers in the cost of the repair because there has been so many failures. It seems that it’s the northern states where these loaders get used for snow removal that are having the most problems.