Cat C27 with Allison 8963 Transmission QT-2

Description

Engine: Caterpillar C27

Type: V-12, 4-stroke, turbocharged and after-cooled diesel
Displacement: 27 litres (1,649 in³)
Bore × Stroke: 137.2 mm × 152.4 mm (5.4 in × 6.0 in)
Rated Speed: 1800 rpm (industrial setting)
Power Range: 800 – 1050 horsepower (597 – 783 kW)
Peak Torque: around 3,450 lb-ft (4,675 Nm) @ 1200 rpm
Aspiration: Twin turbocharged, after-cooled
Injection: Direct electronic injection
Weight (dry): about 6,600 lb (3,000 kg)
Applications: Oilfield pumps, drilling rigs, mining, and other heavy-duty mobile or industrial setups


Transmission: Allison DP8963 (often shortened to “8963”)

Type: 6-speed, powershift, automatic
Rated Input Power: about 1,100 horsepower (820 kW)
Rated Input Torque: 3,300 lb-ft (4,470 Nm)
Gear Ratios:

Gear Ratio
1st 4.24 : 1
2nd 2.32 : 1
3rd 1.69 : 1
4th 1.31 : 1
5th 1.00 : 1
6th 0.73 : 1
Reverse 5.75 : 1

Dry Weight: ~3,700 lb (1,680 kg)
Length: ~60 in (1.5 m)
Oil Capacity: ~21 US gal (79 L)
Mounting: SAE No. 0 housing, typically flex-plate drive
Use Case: Heavy industrial/off-road — frac rigs, haulers, oil-field equipment

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