Engine & Transmission Specifications

Duramax LBZ Diesel Engine Specifications

Type: 90º V-8 charge-cooled turbodiesel
Displacement (cu in/ cc): 403 / 6599
Bore x stroke (in x mm): 4.06 x 3.9 / 103 x 99
Block material: cast iron with induction-hardened cylinder liners
Cylinder head material: cast aluminum
Intake manifold: cast aluminum
Exhaust manifolds: cast nodular iron with steel pipe extension
Compression ratio: 16.8:1
Valve configuration: overhead valve, four valves per cylinder
Valve lifters: Mechanical roller
Firing order: 1 – 2 – 7 – 8 – 4 – 5 – 6 – 3
Fuel system: direct injection diesel with high-pressure common rail
Horsepower 360 @ 3200 rpm
Torque (lb-ft / Nm): 650 @ 1600 rpm
Fuel shut off: 3450 rpm
Crankshaft: forged steel
Connecting rods: forged steel, stress-fractured
Additional features: Turbocharger with charge cooling; exhaust braking (medium duty only);
heated air intake; GM Oil Life System

Allison M1000 6 Speed Transmission

Type: Six-speed rear-wheel-drive, electronically controlled,
automatic overdrive transmission with torque converter clutch
Engine range: 6.6L - 8.1L
Maximum engine torque: 650 lb-ft
Maximum gearbox torque: 900 lb-ft
Gear ratios:  
First: 3.1
Second: 1.81
Third: 1.41
Fourth: 1
Fifth: 0.71
Sixth: 0.61
Reverse: 4.49
Maximum shift speed: 4850 rpm
Maximum validated gross vehicle weight: 9200 – 2500 HD series
6-position quadrant: P, R, N, D, M, 1
Case material: die cast aluminum
Shift pattern: (2) two-way on/off solenoids
Shift quality: force motor control / adaptive shifts
Torque converter clutch: Variable Bleed Solenoid Control
Converter size: 310mm (diameter of torque converter turbine)
Fluid type: DEXRON® VI
Transmission weight: dry: 150 kg (330 lb)
Fluid capacity (approximate): shallow pan: 12L (13 qt.) (dry)
Power take off: provision available
Pressure taps available: main pressure
Assembly sites: Baltimore , Md.
Additional features: Tap-shift range selection mode; elevated idle mode;
low traction mode; shift stabilization; tow/haul; grade braking