New Ram/Cummins vs GM/Duramax on the IKE

ShinerBock wrote:
Hmm, and it appears that GM will only be offering a 3.42 rear end with the diesels in both SRW and DRW versions. So I would not expect a much different outcome with the 3500 DRW version of this truck other than it weighing slightly more than what was used.

ksss wrote:

Especially with no nannies to control the power.

ShinerBock wrote:

Bigfoot affair wrote:


Allison 10L100

1st- 4.54 x 3.42 x 910= 14,129 lb-ft
2nd- 2.86 x 3.42 x 910= 8,900 lb-ft
3rd- 2.06 x 3.42 x 910= 6,411 lb-ft
4th- 1.72 x 3.42 x 910= 5,353 lb-ft
5th- 1.48 x 3.42 x 910= 4,606 lb-ft
6th- 1.26 x 3.42 x 910= 3,921 lb-ft
7th- 1.00 x 3.42 x 910= 3,112 lb-ft
8th- .85 x 3.42 x 910= 2,645 lb-ft
9th- .68 x 3.42 x 910= 2,116 lb-ft
10th- .63 x 3.42 x 910= 1,960 lb-ft

Thank you for the correct gear ratios. I have been trying to find them to no avail. I still seems that 1-6 are underdrive, 7th is direct, and 8-10 are overdrive. So even with a 3.42 rear end the GM was sending more torque to the wheels than a Ram 6-speed with a 4.10 rear end.

Grit dog wrote:

Cummins12V98 wrote:
The 10 speed with lower combined load should have stomped the measly 6 speed with 6 tires dragging the road.

Same downhill braking. GM should have been better with lighter load and higher revving engine to give more braking HP.

Heavier combined load but better economy.

How many here still think the “BRANDED” 10 speed is the Savior???

Put 4.10 gears behind the 10speed and then sit back and watch. Have to build the driveshaft outta drill stem!

RCMAN46 wrote:


Can you provide a link to your source for the gear ratios.

Bigfoot affair wrote:


Allison 10L100

1st- 4.54 x 3.42 x 910= 14,129 lb-ft
2nd- 2.86 x 3.42 x 910= 8,900 lb-ft
3rd- 2.06 x 3.42 x 910= 6,411 lb-ft
4th- 1.72 x 3.42 x 910= 5,353 lb-ft
5th- 1.48 x 3.42 x 910= 4,606 lb-ft
6th- 1.26 x 3.42 x 910= 3,921 lb-ft
7th- 1.00 x 3.42 x 910= 3,112 lb-ft
8th- .85 x 3.42 x 910= 2,645 lb-ft
9th- .68 x 3.42 x 910= 2,116 lb-ft
10th- .63 x 3.42 x 910= 1,960 lb-ft

Cummins12V98 wrote:

ksss wrote:

Cummins12V98 wrote:
Don’t forget RAM is much heavier.

Would you just stop. They are even at that weight. Look at it like the extra gears did not make the GM pickup any faster up the hill, or that the 100 extra pound/feet from RAM didnt buy anything. Your endless RAM excuses really get old.

As for watching fat dudes pull up Ike for the uptenth time, when they are running all DRW's pulling 30K plus up the hill, that should be worth enduring another run up the Ike to see. For 12V98's sake, RAM better win, or we will all have to endure more excuses and he might develop a drinking problem.

Don't like FACTS, SORRY. If it's a problem simply block me.

The RAM combo was HEAVIER like it or not. 6 tire drag does make a difference.

Bigfoot affair wrote:


Allison 10L100

1st- 4.54 x 3.42 x 910= 14,129 lb-ft
2nd- 2.86 x 3.42 x 910= 8,900 lb-ft
3rd- 2.06 x 3.42 x 910= 6,411 lb-ft
4th- 1.72 x 3.42 x 910= 5,353 lb-ft
5th- 1.48 x 3.42 x 910= 4,606 lb-ft
6th- 1.26 x 3.42 x 910= 3,921 lb-ft
7th- 1.00 x 3.42 x 910= 3,112 lb-ft
8th- .85 x 3.42 x 910= 2,645 lb-ft
9th- .68 x 3.42 x 910= 2,116 lb-ft
10th- .63 x 3.42 x 910= 1,960 lb-ft

ShinerBock wrote:
Torque multiplication of the Ram Aisin 6-speed w/ 4.10

1st- 3.75 x 4.10 x 1,000 lb-ft= 11,275 lb-ft
2nd- 2.00 x 4.10 x 1,000 lb-ft= 8,200 lb-ft
3rd- 1.34 x 4.10 x 1,000 lb-ft= 5,494 lb-ft
4th- 1.00 x 4.10 x 1,000 lb-ft= 4,100 lb-ft
5th- .77 x 4.10 x 1,000 lb-ft= 3,157 lb-ft
6th- .63 x 4.10 x 1,000 lb-ft= 2.583 lb-ft

1-3rd are under-drive gears, 4th is direct, and 5-6 are overdrive.


Torque multiplication of the GM Allison 10-speed w/3.42

1st- 4.70 x 3.42 x 910= 14,627 lb-ft
2nd- 2.99 x 3.42 x 910= 9,305 lb-ft
3rd- 2.15 x 3.42 x 910= 6,691 lb-ft
4th- 1.80 x 3.42 x 910= 5,602 lb-ft
5th- 1.52 x 3.42 x 910= 4,731 lb-ft
6th- 1.28 x 3.42 x 910= 3,984 lb-ft
7th- 1.00 x 3.42 x 910= 3,112 lb-ft
8th- .85 x 3.42 x 910= 2,645 lb-ft
9th- .69 x 3.42 x 910= 2,147 lb-ft
10th- .64 x 3.42 x 910= 1,992 lb-ft

1-6 are under-drive, 7th is direct, and 8-10 are overdrive.

The Duramax was winning the torque to the wheels battle even with a 3.42 and it was also winning the horsepower battle according to the manufacturers ratings.