Hi guys I've got a question about my 94 580sk 4x4? What I'm wanting to know is does it sound right for the pump spline's to strip out approximately Evey 4to5 years or if I go by hours it would be every 1500 or so hours this will now be the third time for me on this machine sense I've owned it is this normal for this on the k&SK machines ? Just looking for info?