no it will not keep up with a quad but it is very capeable.
Why would you weld them when a lock right is only a couple of hundred dollars for the suki if it is a DD?
You could also flat tow a suzuki if you wanted to with no issues (Transfercase in N as described in the manual) especially if it had an open rear diff (or manual locking) or you made a full floater axle with locking hubs for the rear. on ours there is a towbar hookup so it can be towed behind a motorhome etc .
we just keep a comealong and rope in the tracker when we go out and that is good for most things