Need help troubleshooting drive issue on Snorkel TB50

Thanks in advance. I've got a oldish TB50 that is finicky when it comes to driving on the ground. I just got it and haven't tested it extensively, but so far I've observed it 1) going in the wrong direction...when offloading from the trailer it went forward properly to a point, then decided reverse was "forward". 2) not going "uphill"...it should be able to handle a 25% grade...my driveway is no where near that...yet it had to be towed. and finally 3) not wanted to go in any...

Need help troubleshooting drive issue on Snorkel TB50

Need help troubleshooting drive issue on Snorkel TB50