I have dune some trouble shooting and with the transmission in forward, and the veh off, the shifter tries to jump out of geer when it's rocket back and forth, especially forward. We have also tried having a second person holding the actual transmission shift linkage in forward and it jumps in and out the same way. Adjusting is no longer available, nothing else can be adjusted. Like I said in the beginning. Now it seems to be mechanic time and break it down and actually find the problem. That's the manual that I need, to breaking it down. Fun begins now.