SPECIFICATIONS

Cross-Section | Features & Benefits | Typical Applications | SCAAN Specification Assistance

Gross input power (maximum).......................295 hp (220 kW)
Gross input torque (maximum).................910 lb ft (1234 N�m)
Net input power (maximum).........................270 hp (201 kW)
Net input torque (maximum)...................870 lb ft (1180 N�m)
Rated input speed (minimum-maximum)..............2000 - 2800 rpm
    

Mounting

Engine...................SAE 2 flywheel housing, flex disk drive
Chassis....................................Rear support required    

Torque converter

Type.........................One-stage, three element, polyphase
Stall torque ratio............TC 411-2.8; TC 413-2.4; TC 415-2.4
                  TC 417-2.2; TC 418-2.0; TC 419-2.0; TC 421-1.8
Lockup clutch with torsional damper............Integral/standard
                                        (available in all ranges)
    

Gearing⁺

Type.................Patented, constant mesh, helical, planetary
         Range                                  Ratios*:
         First...................................3.49:1
         Second..................................1.86:1
         Third...................................1.41:1
         Fourth..................................1.00:1
         Fifth...................................0.75:1
         Sixth...................................0.65:1
         Reverse.................................5.03:1
         Ratio Coverage:
         Forward (5 speed).......................4.65:1
           * Gear ratio does not include torque converter ratio.    

Power Takeoff Provision

Optional power takeoff units, multiple ratio/ratings....constant-
       drive or clutched-drive (adds approx 4.2 inches in length)
Left or right side......................................optional
    

Oil system

Oil type.........................................C4, DEXRON�-III
Capacity (excluding external circuit).....26 U.S. qts (25 liters)
Filters-main & cooler..............Replaceable element, integral
Heat exchanger type................Oil to water, direct-mount or
                                          remote-mount available
    

Size

                                                          B 400
Length (FW housing to output flange face).......29.0 in (736 mm)
Depth (centerline to lowest point)..............11.0 in (279 mm)
Weight (dry)**..................................535 lbs (243 kg)
                                                         B 400R
Length (FW housing to outputflange face)........29.0 in (736 mm)
Depth (centerline to lowest point)..............11.0 in (279 mm)
Weight (dry)**..................................610 lbs (227 kg)
**Weight inclues output flange/yoke and adaptation.
+Vocational shift calibrations vary by application.
    

Transmission Cross-section (go to top)

Design Features (go to top)

	The B 400R 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 400R includes as standard equipment: Integral output retarder Remote oil cooler Output flange/yoke Engine adaptation Shallow sump for ground clearance Electronic dipstick Two year unlimited mile warranty Secondary shift schedule Integral pushbutton shift selector and max feature ECU Throttle position sensor (TPS) [Nonelectronic engine] Wiring harness Vehicle interface module (VIM)

Certain features listed above can be handled as delete options.

Various add options are available direct from Allison and also carry the full B 400R transmission warranty. Contact Allison Transmission Sales for specific information.

*Base price will vary if other than specified adaptation is requested

Typical Applications (go to top)

	Low Floor Transit Bus
	Intercity Tour Bus
	Double-Deck Bus
	Transit Bus

Areas of the world may differ in approved models

SCAAN Specification Assistance (go to top)

To be sure that you get the most efficient engine/transmission package for your operation in your territory with your preferred vehicle, your local Allison Transmission distributor offers SCAAN (System for Computerized Application ANalysis) to help take the guesswork out of vehicle-buying specification decisions.

SCAAN can compute a wide variety of vehicle performance parameters; and will also check your powertrain specifications against Allison Transmission vocational experience to optimize vehicle performance.