I have a around 1998 l3400 hst and the shift into 2 and 4 stopped today, i have lo and don't want to force the lever as the last time (3 years ago) i had an hst issue and forced the lever it cost 6400 to fix at a kubota dealer. Any things to check? The engine runs fine, the fluid is good and it was working in 2nd earlier with no problem The tractor has minimum use on it and never gets beat on so the second time having a hst problem on less that 500 hours is strange.