M8970DT TRANSMISSION Parts group M8970DT T07700 TRANSMISSION CASE T07900 PTO PROPELLER SHAFT T08000 FIRST SHAFT T08100 COUNTER SHAFT T08200 HI-LO GEAR SHAFT 1 T08300 HI-LO GEAR SHAFT 2 EXCEPT BACK CREEP T08600 BACK IDLE SHAFT sale parts diagram catalog online construction equipment excavator tractor