Got the gearbox tightened with lock tight on the bolts.
So hope I am good to go for a while.
Did notice the pto shaft on the gearbox did not have a safety snap ring installed in the grove.
This to keep the pto drive shaft connected to the gearbox shaft in case the shear bolt shears off.
Must get that fixed.
When I got my post hole digger, it was the same way, the gearbox pto shaft did not have a safety bolt or pin to keep the drive shaft attached in case the shear bolt broke off.