Regal Velvet Drive 3007000E01, Service Manual, Page: 7 / 72

5
T R A N S M I S S I O N S
®
Section I Description
INTRODUCTION (see figure 1)
The 71L and 72L transmissions consist of a planetary
gear set and multiple disc clutches . The input and out-
put shafts are in line .
Hydraulic pressure is provided by a crescent type
pump . The pump is driven at engine speed by the input
shaft . Oil from the pump is sent to the control valve .
The positions on the control valve are forward-neutral-
reverse . An internal regulator valve controls system
pressure . Oil discharged by the regulator valve is sent
to the oil cooler .
THEORY OF OPERATION
General
: Forward is direct drive . A planetary gear set
(1 .1 to 1 .0 ratio for 72L and 1 .0 to 1 .0 ratio for 71L) is
used to obtain reverse .
Figure 1. 71L & 72L Transmission Assembly
Description
Model
71L
Model
72L
Model 71LV
& 71LVTS
Model 72L
& 72LVTS
Model
72LX
Model
72LH
Model
72LHP
Speeds
Fwd.
and Rev.
Fwd.
and Rev.
Fwd.
and Rev.
Fwd.
and Rev.
Fwd.
and Rev.
Fwd.
and Rev.
Fwd.
and Rev.
Approx. Wt. 67 71 113 117 71 85 87
Table 1. Technical Specifications
ID TAG ID TAG ID TAG
71L AND 72L 72LX 72LH AND 72LHP
71LV AND 72LV
71LVTS AND 72LVTS
ID TAG
ID TAG
3007 & 3019
3018 & 3008 3018 & 3008
3010 & 3009 3011