Allison Transmissions

Automatic Models VR 731RH, V 731RH VR 731, V 731, V 730 up to 275 nhp (205 kW) General Rating+

                                         V 730 / V 731 / VR 731
Input...............................Left hand (viewed from input)
Output............................Right hand (viewed from output)
Output configuration......................at 63° angle with input
    

                                             V 730RH / VR 731RH
Input..............................Right hand (viewed from input)
Output............................Right hand (viewed from output)
Output configuration.....................at 63° angle with input
    

                                                      
Net input power (max).............................275 hp (205 kW)
Input speed range................................2000 - 2600 rpm;
                                       2100 - 2600 rpm for V 730
Net input torque (max).......................890 lb ft (1207 Nˇm)
Vehicle Weight...................up to 40,000 lb (18,144 kg) GVW    

                                         V 730 / V 731 / VR 731
Engine............SAE #1-1/2; flywheel housing with +quill shaft
                                              & torsional damper

Vehicle..............................Provision for rear mount if
                                 required by engine manufacturer
    

                                             V 730RH / VR 731RH
Engine.................Unique engine adapter plate. Damper drive
                                    through integral input shaft

Vehicle.............Bolt pad on rear cover plus one (6) bolt pad
                  at 3 o'clock and one (5) bolt pad at 7 o'clock
                      position as viewed into transmission input
                                to serve as rear engine mounting.
    

Type..........................Single stage, 3-element, polyphase
Stall torque ratio......................TC 470-2.79; TC 490-2.54
Automatic lockup clutch..........Effective in 2nd and 3rd ranges
    

Type...................Constant mesh, helical right hand gearing,
                                            spur type, planetary

         Range                                  Ratios*:
         First...................................1.77:1
         Second..................................1.21:1
         Third...................................0.88:1
         Reverse.................................1.46:1

           * Gear ratios do not include torque converter ratio,
             but includes .875 input bevel gear ratio    

Type....................................Engine-driven shaft type
Location..Right side of vehicle, parallel with engine centerline
Drive gear ratio.............................1.48 x engine speed
Drive gear rating........................50 hp (37kW) continuous
    

Oil type.................DEXRONŽ, DEXRONŽ-II, type C-3, type C-4
Capacity - initial fill (excluding external circuit)
     V730, V731, V731RH.....................34 US qts (32 liters)
     VR731, VR731RH.........................36 US qts (34 liters)
Filter............Full flow, replaceable element, remote mounted
Cooler............................................Remote mounted
(filter and cooler not furnished on transmission assemble but are supplied
  by vehicle manufacturer)    

                                                       V730/731
Length.........................................46.4 in (1179 mm)
Width...........................................26.4 in (671 mm)
Height..........................................26.5 in (673 mm)
Weight (dry)....................................890 lbs (405 kg)

                                                          VR731
Length.........................................46.4 in (1179 mm)
Width...........................................26.4 in (671 mm)
Height..........................................26.5 in (673 mm)
Weight (dry)....................................935 lbs (425 kg)

                                                         V731RH
Length.........................................46.4 in (1179 mm)
Width...........................................31.1 in (789 mm)*
Height..........................................26.5 in (673 mm)
Weight (dry)...................................1090 lbs (495 kg)

                                                        VR731RH
Length.........................................46.4 in (1179 mm)
Width...........................................31.1 in (789 mm)*
Height..........................................26.5 in (673 mm)
Weight (dry)...................................1135 lbs (516 kg)
*Typical dimension varies from engine to engine depending on mounting hardware.
 
NOTE: Transmission attaches directly to engine supplied adapter plate, not
 flywheel housings resulting in a weight savings

+Quill shaft and torsional damper not supplied with transmission.    

	Designed for use with diesel engines up to 275 nhp (205 kW). Three forward ranges and one reverse. This transmission model is designed specifically for transit bus applications.
	Clutches are multidisc design, oil-cooled, hydraulically-operated, and self-compensating for normal wear. Spur type planetary gears are designed for strength, quietness, and long life.
	Automatic upshifting and downshifting within each drive range. Built-in inhibitors prevent downshifts or shifts into reverse unless vehicle speed is within an acceptable range.
	Optional engine-driven power takeoff is shaft type and is located at right side of vehicle, parallel with engine centerline.
	Output configuration is a 63° angle with the input; output rotation (as viewed from the input) is clockwise in forward range.
	Allison Electronic Controls provide: programmable features to perform vehicle and vocational requirements; built-in diagnostics which constantly monitor operation and facilitate the detection of problems if they occur.
	An optional hydraulic retarder is available to provide additional vehicle braking. The VR 731(RH) retarder is located at the output of the transmission and consists of a high-efficiency hydraulic, vaned rotor-type retarder designed for maximized space utilization. Retarder power is obtained by directing transmission fluid to the retarder housing where power is absorbed by fluid impacting against the rotor vanes. The retarder rotor rotates at output shaft speed, resulting in smooth braking independent of gear range or engine speed.

Transit Bus