| Design Feature |
Duramax 6600 |
Ford Powerstroke
(Navistar T444) |
Dodge (Cummins ISB) |
Horsepower rating
(SAE hp @ rpm) |
300 @
3100
(Auto. Trans.,
Man. Trans.) |
250 @
2600
(Auto. Trans.) 275 @ 2800
(Man. Trans.) |
235 @
2700
(Auto. Trans.,
5-Speed Man. Trans.) 245 @ 2700
(6-Speed Man. Trans.) |
Torque Rating
(lb.-ft. @ rpm) |
520 @
1800 rpm
(Auto. Trans.,
Man. Trans.) |
460 @
1600 rpm
(Auto. Trans.)
520 @ 1600 rpm
(Man. Trans.) |
460 @
1600 rpm
(Auto. Trans.)
505 @ 1600 rpm
(Man. Trans.) |
| GCWR(1) (max. lbs.)
|
22,000
|
20,000
|
20,000
|
| Deep skirt, cast iron
block |
Standard
(features cross-bolted main bearings) |
Not
Available |
Standard |
| Aluminum cylinder head |
Standard |
Not
Available
(cast iron) |
Not
Available
(cast iron) |
| Electronic Fuel
Injection System (direct or indirect) |
Bosch
Common Rail
(direct) |
Hydraulic Electronic Unit Injection
(direct) |
Bosch
VP44
(direct) |
| Manual Transmission
|
Standard
6-speed |
Standard 6-speed |
Standard 5-speed Standard 6-speed |
| Automatic Transmission
|
Available new Allison Series 5-speed |
Available 4-speed Automatic |
Available 4-speed Automatic |
| Tow/Haul Mode |
Included
with Allison 5-speed |
Not
Available |
Not
Available |
| Automatic Grade Braking
|
Included
with Allison 5-speed |
Not
Available |
Not
Available |
