M7970DT TRANSMISSION Parts group M7970DT T07600 TRANSMISSION CASE T07700 TRANSMISSION CASE REAR COVER T07800 PTO PROPELLER SHAFT T07901 FIRST SHAFT (EXCEPT DUAL SPEED) T07902 FIRST SHAFT (DUAL SPEED) T08000 COUNTER SHAFT T08100 HI-LO GEAR SHAFT T08200 HALF GEAR SHAFT T08300 BACK IDLE SHAFT T08400 PTO DRIVE SHAFT T08502 PTO SHAFT [AU] sale parts diagram catalog online construction equipment excavator tractor