I would like to know how to fix this as well. I had mine pull out while making a turn and it is not the kind of excitement I like. All it has is a little set screw to hold it on the steering box. I can't recall what kind of connection is on top of the steering box but I remember thinking it did not look like a standard splined unit. I ended up putting mine back together and loctited the setscrew in so it won't come loose again.
Post a pic guys it sounds dangerous . I am using a coupler-u-joint in mine and it isn't coming apart.
On the splined shaft box you just use a splined shaft coupler and a set screw to hold it in place.
We rebuilt quite a few steering boxes for Total back in the day. The coupler was held on the straight shaft box with a 3/16" solid pin. never ever heard of one breaking. On the splined shaft box you just use a splined shaft coupler and a set screw to hold it in place.
This is how mine is. But if the screw comes loose than the steering shaft can pull out a few inches.
Use a longer set screw with a nut on it to lock it in place. It should not come loose.
Post a pic guys it sounds dangerous . I am using a coupler-u-joint in mine and it isn't coming apart.
Thats fine use the 5/8 to doub d or whatever the steering shaft is borgleson joint and drill the notch when you get it in hand