Net input power (max)............................235 hp (175 kW)
Input speed range.......................2400 - 4000 rpm (diesel),
                                      3200 - 4400 rpm (gasoline)
Input speed range w/retarder option.....2400 - 3600 rpm (diesel),
                                      3200 - 3600 rpm (gasoline)
Net input torque (max).......................445 lb ft (603 N�m)
Vehicle weight (GVW or GCW)....................Up to 30,000 lbs
                                                     (13,608 kg)    

Engine...SAE 3 automotive flywheel housing with flex plate drive
Vehicle......................One vertical mounting pad each side    

Type.........................Single-stage, 3-element, multiphase
Stall torque ratio.........TC 230-2.60; TC 275-1.96; TC 290-1.72    

Type..........................Constant mesh, spur type planetary
         Range                                  Ratios*:
         First...................................3.45:1
         Second..................................2.25:1
         Third...................................1.41:1
         Fourth..................................1.00:1
         Reverse.................................5.02:1
           * Gear ratio does not include torque converter ratio.    

Converter driven (SAE 6-bolt Regular Duty PTO)
Location............................Right side (viewed from rear)
Drive gear ratio............... All ranges--1.00 x turbine speed
Drive gear rating.................200 lb ft (270 N�m) continuous; 
                                250 lb ft (340 N�m) intermittent    

Oil type..........................Dexron� IIE;, Dexron� III, C 4
Capacity (excluding external circuit)...20 U.S. qts (18.9 liters)
                                                 (w/std. oil pan)
Filter............Full flow, replaceable element, remote mounted 
Cooler............................................Remote mounted 
(Filter and cooler not furnished on transmission assembly but is supplied
 by vehicle manufacturer.)    

Length..........................................27.2 in (692 mm)
Width...........................................19.8 in (503 mm)
Height............(with standard 5.3" oil pan)..20.4 in (519 mm)
Depth Below Center Line.........................11.2 in (284 mm)
Weight (dry)....................................289 lbs (131 kg)
Weight (dry w/retarder option)..................329 lbs (149 kg)
+NOTE: Vocational ratings may vary by vocation. 
*NOTE:  The PTO provision is not available on the retarder models.    

	Designed for use with diesel and gasoline engines up to 235 nhp (175 kW). Four forward ranges and one reverse. This transmission model is best suited for school buses, fuel delivery, beverage delivery, general P&D, limited transit coach and light-duty dump truck 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.
	The Allison three-element torque converter provides smooth, shock-free operation. A choice of converters permits matching the AT 545(R) to a wide variety of engines.
	Converter-driven power takeoff drive on right side of transmission (as viewed from the rear) is standard on non-retarder models. Design is SAE 6-bolt.
	Provisions for neutral start switch, reverse signal switch, SAE regular-duty thread-type speedometer drive, electronic speedometer drive and parking brake.
	5.3 inch oil pan is standard. Optional 3.8 inch oil pan is available when ground clearance dictates its use. Optional 3.8 inch oil pan is not available with retarder option.
	An optional additional neutral position allows for "park brake" position on the shift selector for application of an OEM-supplied parking brake system.
	Optional input retarder with power absorption capacity of 160 hp at 2600 rpm for vehicle downhill speed control. This option requires the 5.3 inch oil pan.

	Stepvan
	Tanker Truck
	P&D Truck
	Emergency Vehicle
	Lease/Rental Vehicle
	Refrigerated Van
	Motorhome
	School Bus
	Flatbed Truck
	Small Wrecker
	Utility Truck
	Road Sweeper
	Other applications are available.