Hello, I have a 2012 l45 loader backhoe with around 700 hours on it. The problem I am having is after the tractor reaches normal operating temp I begin to have forward and reverse issues. The tractor will start jumping forward and often the reverse will completely stop working. I took it to a Kubota shop, after almost a month they had made no progress and racked up nearly 5 grand in shop hours. Any advice would be greatly appreciated.