New Holland T8010 Manual page 121

Section 21 - Transmission, Drivelines - Chapter 1
POWER FLOW (REVERSE SPEEDS)
THIRD REVERSE GEAR - As the operator selects third reverse speed, he simultaneously engages the odd-speed
clutch, reverse-speed clutch pack and the medium-range clutch pack through the transmission controller. The
power then flows from the drop box, through the input shaft, the engaged odd-speed clutch pack, to the
countershaft gear. Since the countershaft gears are in constant mesh with the output shaft gears, power flows
forward from the countershaft, to the even-speed drive gear (idler gear), to the engaged reverse-speed clutch pack.
Power is then directed across the output shaft to the master clutch. The addition of an idler gear for third-reverse
causes the speed output shaft, and everything rearward of the pinion shaft, to reverse rotation in contrast to the
forward gear rotation. With the master clutch engaged, power is transmitted across the range transmission input
shaft to the medium range clutch pack. Power then flows to the medium-range driven gear on the range
countershaft, across to the constant mesh gear set driving the pinion shaft.
FOURTH REVERSE GEAR - As the operator selects fourth reverse speed, the odd-speed clutch is disengaged,
and the even-speed clutch is engaged. Power then flows from the speed transmission input shaft, through the even
speed clutch, directly to the reverse-speed clutch. Since the countershaft is not used to transmit power in fourth
reverse, the direction of rotation provided to the speed output shaft is opposite that which occurs in the forward
speeds. Power flows through the range transmission in the same manner as third reverse.
NOTE: HIGH RANGE CLUTCH PACK IS NOT USED FOR REVERSE SPEEDS.
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