Locking Tuff Torq?

[Brushape]

At some point I want to replace my K57 with something that I can lock. Not so much for the summer but I do a fair amount of snowblowing and the K57 isn't really ideal. Some K66 and k71 diffs come up for sale but I have no idea what models are locking. I know I may have to make some modifications to make this work. Anyone know where to find this info? Thanks

 

[Wolfy]

We have an John Deere GX335 at work that has a manually operated differential lock. Im pretty sure it is a Tuff Torq.

 

[Brushape]

Thanks - that does help. What I am really hoping to get is the model/part number right off a locking Tuff Torq

 

[jaydee325]

I've attached the Tuff Torq brochure for the models you're interested. It shows under Key Features that differential lock is optional on these models. I couldn't find anything on Tuff Torq that tells you what to look for if for instance, you found a used one.