Specifications

ENGINE: 6.7-LITER HIGH OUTPUT CUMMINS TURBO DIESEL I-6
Availability ---- Opt. - 2500, 3500; available Jan. 1, 2007
Type and Description ---- Six-cylinder, inline, liquid-cooled,
turbocharged, intercooled
Displacement ---- 408 cu. in. (6690 cu. cm)
Bore x Stroke ---- 4.21 x 4.88 (107 x 124)
Valve System ---- OHV, 24 valves, solid lifters
Fuel Injection ---- Electronic high-pressure common rail
Construction ---- Cast-iron block and head
Compression Ratio ---- 17.3:1
Power (SAE net) ---- 350 bhp (261 kW) @ 3,000 rpm
Torque (SAE net) ---- 650 lb.-ft. (881 N*m) @ 1,500 rpm w/6-spd.
automatic;
610 lb.-ft. (827 N*m) @1,400 rpm w/6-spd. manual
Maximum High-idle Engine Speed ---- 3,500 rpm
Fuel Requirement ---- Ultra Low Sulfur Diesel
Oil Capacity ---- 12 qt. (11.3L) with filter
Coolant Capacity ---- 29.5 qt. (28.0L)
Emission Controls ---- Exhaust after-treatment systems and internal engine
features

TRANSMISSION: 68RFE ORION-AUTOMATIC, SIX-SPEED
Availability ---- Opt. with 6.7L turbo diesel engine; available Jan. 1,
2007
Description ---- Three planetary gear sets, one overrunning clutch, full
electronic control, electronically controlled converter
clutch
Gear Ratios
1st ---- 3.231
2nd ---- 1.837
3rd ---- 1.410
4th ---- 1.0
5th ---- 0.816
6th ---- 0.625
Reverse ---- 4.444
Overall Top Gear Ratio ---- 2.33 with 3.73 axle ratio; 2.56 with 4.10 axle
ratio