What are the HP/Torque figures for the new 6.7 WITH a manual transmission???

 

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

 

Why the difference with the manual tranny??

 

I don't think the clutch can handle any more than 610 Tq. I also heard they will be cut back to 325 HP for the manual trans for the same reason.

 

Why???? Are manual trannies not stronger????

 

no probably to keep from having to replace alot of clutches while still under warranty.

 

they can put in a clutch that can handle in excess of 550hp. my thinking is DC is wanting people to buy more automatics just the same way chevy detunes the d-maxie for sticks.

 

I think it's because the torque converter eats up the difference. It's my understanding that torque converters take away some of the power. I bet if you put identical trucks (with exception to the transmission) on a chassis dyno, the power numbers would be the about the same. THis is just my understanding of it, I am only about 95% sure that this is right.

 

you are right, but the difference power would more than make up for what is lost in the drive train.