ALLISON HT 740 TRANSMISSION SPECIFICATION
ALLISON HT 750 TRANSMISSION SPECIFICATION

 

 

Specialiazing in Repair, Maintenance, Overhaul of Allison Transmission : Allison HT 740/ HT 750

 

Maju Engineering Services Sdn. Bhd (MESSB) offers not only new Allison Transmissions but we also have a vast stock of rebuilt Allison Transmissions. The gearboxes are overhauled by factory trained mechanics who with the use of new and genuine Allison parts create an automatic transmission which is as good as new.

Every rebuilt transmission is fitted with new bearings and where applicable the latest modifications are implemented. Finally every rebuilt transmission is severely tested under load. All this results in a high quality rebuilt transmission which equals a brand new transmission. Drive Line Systems has a vast stock of rebuilt AT/MT/HT/CLT transmissions but we are also able to offer rebuilt Off-Highway transmissions like the CL(B)T5000 and 6000 Series.

Today's engine and axle options have made specifying a truck more demanding. We can help. Whether you're looking for enhanced fuel economy, increased productivity or high performance, we have the tools to help you select an Allison Transmission that will match your specific application needs.

So if you are searching for a rebuilt Allison HT 740/ HT 750 transmission so you can proceed with your business as soon as possible, don’t hesitate to contact us and ask for a quotation which meets your requirements. We ship to anywhere in the world, we are located in Asia and carry most stock.

ALLISON HT 740/ HT 750 SPECIFICATIONS
  • Designed for use with diesel engines up to 445 nhp (332 kW). Four forward ranges and one reverse. This transmission model is best suited for medium- and heavy-duty trucks and buses.
  • 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 740 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.
  • Provisions for neutral start switch, reverse signal switch, SAE regular-duty thread-type speedometer drive, electronic speedometer drive, 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.
General Purpose Truck Rating

Net input power (max).............................445 hp (332 kW)
Input speed range................................1900 - 2400 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
Mounting
Direct..............SAE 1 flywheel housing with flex plate drive
Remote.....Converter housing side pads, and rear housing top pad
Torque converter
Type..........................Single-stage, 3-element, polyphase
Stall torque ratio.........TC 487-1.50; TC 488-1.70; TC 497-2.72;
TC 470-2.83; TC 495-2.39; TC 496-1.78;
TC 498-2.45; TC 499-1.91
Automatic lockup clutch..........Effective in all forward ranges
or effective in 2nd through 4th ranges
– depending on model used
Gearing
Type.........................Constant mesh, spur type, planetary

Range Ratios*:
First...................................3.69:1
Second..................................2.02:1
Third...................................1.38:1
Fourth..................................1.00:1
Reverse.................................6.04:1
* Gear ratio does not include torque converter ratio.
Power takeoff provision
Converter driven (SAE 6-bolt)
Location................10 o'clock position (as viewed from rear)
Drive gear ratio............................1.00 x turbine speed
Drive gear rating.................300 lb ft (407 N·m) continuous;
400 lb ft (543 N·m) intermittent

Engine driven (optional) (SAE 8-bolt)
Location....converter housing: one at 1 o'clock position and one
at 8 o'clock position (as viewed from rear)
Drive gear ratio.......1 o'clock position – 1.35 x turbine speed;
8 o'clock position – 0.84 x turbine speed
Drive gear rating.................200 lb ft (149 N·m) continuous;
260 lb ft (194 N·m) intermittent
Oil system
Oil type..........................................Dexron II®, C4
Capacity
(excluding external circuit)...7.5 U.S. gals (28.5 liters)
(w/std. oil pan)
Filter..................................External, remote mounted
Cooler............................................Remote mounted

(Filter and Cooler not furnished on transmission assembly but is supplied
by vehicle manufacturer.)
Size

Length..........................................37.4 in (950 mm)
Width...........................................21.7 in (552 mm)
Height..........................................26.6 in (675 mm)
Weight (dry)..........................840 lbs (381 kg) (approx.)

+NOTE: Vocational ratings may vary by vocation.


 

Model No.
   
175
235
603
445
186
250
868
640
332
445
1945
1435
205
275
1085
800
     
Off Highway Series TORQMATIC SERIES 1000 SERIES
2000 SERIES 3000 SERIES 4000 SERIES
ENGINE DRIVEN PTO ALLISON TORQUE CONVERTER POWER
SHIFT TRANSMISSIONS
4th gen transmission    
     
     
     



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