Allison Transmissions

Automatic Model HT 754CR up to 445 nhp (332 kW)

Net input power (max).............................445 hp (332 kW)
Input speed range................................1900 - 2100 rpm*
Net input torque (max)......................1435 lb ft (1946 N·m)
Vehicle weight (max)............Up to 80,000 lbs (36,287 kg) GVW
                                 and 130,000 lbs (58,967 kg) GCW  

Direct..............SAE 1 flywheel housing with flex plate drive
Remote.....Converter housing side pads, and rear housing top pad  

Type..........................Single-stage, 3-element, polyphase
Stall torque ratio.........TC 470-2.83; TC 487-1.50; TC 488-1.70;
                           TC 495-2.39; TC 496-1.78; TC 497-2.72;
                                        TC 498-2.45; TC 499-1.91
Lockup Clutch, automatic...............Normally Effective in 2nd
                                              through 5th ranges  

Type..........................Constant mesh, spur type planetary

         Range                                      Ratios*:
         First.......................................3.69:1
         Second......................................2.00:1
         Third.......................................1.58:1
         Fourth......................................1.25:1
         Fifth.......................................1.00:1
         Reverse...9.65 (2.96 required with second gear start)
           * Gear ratio does not include torque converter ratio.  

Converter driven (SAE 6-bolt)
Location...................Top, left side at 10 o'clock position
                                            (as viewed from rear)
Drive gear ratio............... All ranges--1.00 x turbine speed
Drive gear rating.................300 lb ft (407 N·m) continuous; 
                                400 lb ft (543 N·m) intermittent  

Converter driven (optional) (SAE 8-bolt)
Location.................Converter housing; one o'clock position 
                 and eight o'clock position (as viewed from rear)
Drive gear ratio............... One o'clock--1.35 x engine speed
                              eight o'clock--0.84 x engine speed
Drive gear rating.................200 lb ft (149 N·m) continuous; 
                                260 lb ft (194 N·m) intermittent  

Oil type.........................................Dexron III®, C4
Capacity 
     (excluding external circuit).....7.5 U.S. gals (28.5 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.........................................41.0 in (1041 mm)
Width...........................................21.8 in (552 mm)
Height (7" pan).................................26.6 in (675 mm)
Weight (dry/approx.)............................940 lbs (426 kg)
+NOTE: Vocational ratings may vary by vocation.   

	Designed for use with diesel engines up to 445 nhp (332 kW). Five forward ranges and one reverse. This transmission model is best suited for medium- and heavy-duty vehicle 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 lockup clutch, throttle-modulated for maximized fuel economy and enhanced engine braking. 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 HT 754CR to a wide variety of engines.
	Converter-driven power takeoff drive on right side of transmission (as viewed from the rear) is standard. Design is SAE 6-bolt.
	Optional engine-driven power takeoff is available in two locations - upper right and lower left sides, as viewed from rear. Design is SAE 8-bolt.
	Optional input retarder, with power absorption capacity of 365 nhp (272 kW) at 2100 RPM, for vehicle downhill speed control.
	Provisions for neutral start switch, reverse signal switch, SAE regular-duty thread-type speedometer drive, Electronic Speedometer and parking brake.
	7.0 inch oil pan is standard. Optional 6.0, 4.5 and 8.5 inch pans are available when ground clearance or heavy-duty operation dictates their use.

	Linehaul
	Refuse (Side load)
	Dump Truck
	Agricultural Tractor
	Motorhome
	Intercity Coach
	Fire Truck
	Wrecker
	Construction Hauler
	Refuse (Rear load)
	On/Off-Highway Logging Truck
	Lowboy Equipment Hauler
	Other applications are available.