New poster needs help with 2013 Rancher TM

Hi everybody,
Longtime reader but new poster on the forum. I’ve searched my topic but have not found an answer or direction for my problem.
A couple weeks ago, I bought a 2013 Rancher TM that would not shift. The engine runs fine and after checking it out I thought it was probably a linkage-type issue. My youngest son and I were looking for a winter project (and he wanted a new/used atv, so I bought it.
Since getting it home we pulled the engine and removed the front crankcase cover to expose the forward linkage. With the engine removed, we discovered that the rear end (final drive) was locked up.
Thinking I’d found the problem (yeah I know,AFTER pulling the engine), I thought we should be able to shift and free up the output shaft but I can’t get it free.
Does the engine need to be running to shift?? On my foremans, I can shift them into neutral with just the key on. Do I need to hook electrical back up to shift it?
I’m following the Honda service manual for this model but there are really no troubleshooting keys in there.
Other than the discolored outer hub on the centrifugal clutch everything inside the front cover looks intact.
I’m beginning to think I’m the only guy out there that has a TM shifting problem…….
Sorry for the long post but I’m at a loss. Any ideas would be greatly appreciated. Thanks.

New poster needs help with 2013 Rancher TM

Hi everybody,
Longtime reader but new poster on the forum. I’ve searched my topic but have not found an answer or direction for my problem.
A couple weeks ago, I bought a 2013 Rancher TM that would not shift. The engine runs fine and after checking it out I thought it was probably a linkage-type issue. My youngest son and I were looking for a winter project (and he wanted a new/used atv, so I bought it.
Since getting it home we pulled the engine and removed the front crankcase cover to expose the forward linkage. With the engine removed, we discovered that the rear end (final drive) was locked up.
Thinking I’d found the problem (yeah I know,AFTER pulling the engine), I thought we should be able to shift and free up the output shaft but I can’t get it free.
Does the engine need to be running to shift?? On my foremans, I can shift them into neutral with just the key on. Do I need to hook electrical back up to shift it?
I’m following the Honda service manual for this model but there are really no troubleshooting keys in there.
Other than the discolored outer hub on the centrifugal clutch everything inside the front cover looks intact.
I’m beginning to think I’m the only guy out there that has a TM shifting problem…….
Sorry for the long post but I’m at a loss. Any ideas would be greatly appreciated. Thanks.