Allison Transmission

                                                         
Gross input power (maximum).......................1250 hp (933 kW)
Gross input torque (maximum)................3700 lb ft (???? N·m)
Net Input power (maximum).........................375 hp (280 kW)
Net input torque (maximum)..................1200 lb ft (1627 N·m)
Rated input speed (minimum-maximum)..............1700 - 2300 rpm

      

Direct..................SAE #0 flywheel housing, flex disk drive
Chassis............18 bolt min. flange mount or 6 bolt side pads        

Type.........................One-stage, three element, polyphase
Stall torque ratio............TC 521-2.4; TC 531-2.3; TC 541-1.9
                                          TC 551-1.8; TC 561-1.6
Lockup clutch with torsional damper............Integral/standard
                                        (available in all ranges)
        

Type...............Patented, constant mesh, helical, planetary.
                  Available in 4,5 or 6-speed shift calibrations.

         Range                                  Ratios*:
         First...................................3.51:1
         Second..................................1.91:1
         Third...................................1.43:1
         Fourth..................................1.00:1
         Fifth...................................0.74:1
         Sixth...................................0.64:1
         Reverse.................................4.80:1
         Ratio Coverage 
         Forward (5 speed).......................5.48:1

           * Gear ratios do not include torque converter multiplication.        

Oil type....C4, MIL-L-2104, MIL-L-46167, DEXRON®-II, DEXRON®-IIE
Capacity.............................(excluding external circuit)
                             Initial fill 47 U.S. qts (45 liters)
Oil change............................... 37 U.S. qts (39 liters)
Filters-main & cooler..............Replaceable element, integral
Heat exchanger type................Oil to water, direct-mount or
                                          remote-mount available
        

                                                          B 500
Length (FW housing to outputflange face)........34.0 in (865 mm)
Depth (centerline to lowest point)..............13.1 in (328 mm)
Weight (dry)**..................................831 lbs (378 kg)

                                                         B 500R
Length (FW housing to outputflange face)........34.0 in (865 mm)
Depth (centerline to lowest point)..............13.1 in (328 mm)
Weight (dry)**..................................906 lbs (412 kg)
**Weight inclues output flange/yoke and adaptation.        

	The WT Bus Series incorporates the latest technology in design and manufacturing techniques.
	Hydraulic torque converter with lockup clutch and integral torsional vibration damper, planetary gear package, and oil pump on one concentric axis.
	Unique patented helical gear arrangement provides up to 6 speeds in a compact package.
	The electronic control system is standard equipment. This includes a bus pushbutton selector and wiring harness.
	Integral externally accessible cartridge type oil filters simplify maintenance.
	Pressure balanced rotating clutches provide quick, smooth shifts.
	Adaptive controls tailor shifts to the driving conditions.
	The B 500R includes as standard: Integral retarder Remote oil cooler Output flange/yoke Engine adaptation* Shallow sump for ground clearance Oil level sensor Two year bus warranty Secondary shift schedule Integral pushbutton or lever selector and max feature ECU Throttle position sensor (TPS) Wiring harness Vehicle interface module (VIM)

	Remote shift selector
	Power takeoff provision (adds 3.8 in to length of transmission)
	Power takeoff units
	Direct-mount oil cooler

	Transit Bus
	Intercity Bus
	Intercity/Tour Bus
	Articulated Transit Bus