I've had 4 tranny problems in the 20 years with this machine but this last one is a new twist. Shifter has had more of a tendency to spring OUT of detent in 1st gear than any other gear for quite a while now. Today the rig stopped engaging at all in 1st, the lever goes into detent but it doesn't engage. The other 3 speeds work fine, so does the shuttle lever on the column which I fixed just months ago. I fear this might be a "remove to investigate" event!