4.11 Rear end

[jlwelding]

Finally got it done, the most awesome thing Ive done to this truck. Say good bye to high egt's and hello to fuel mileage and power. She's a power house now.

 

[Tractorman]

 

What tire size are you running?

 

- John

[Mopar1973Man]

On 10/11/2024 at 9:41 PM, jlwelding said:

Finally got it done, the most awesome thing Ive done to this truck. Say good bye to high egt's and hello to fuel mileage and power. She's a power house now.

 

Amazing how proper ratio really helps out. 

[jlwelding]

On 10/12/2024 at 9:17 AM, Tractorman said:

 

What tire size are you running?

 

- John

LT235-85-R16

On 10/12/2024 at 9:17 AM, Tractorman said:

 

What tire size are you running?

 

- John

235-85-R16

[Tractorman]

On 10/19/2024 at 7:05 PM, jlwelding said:

235-85-R16

 

I'll bet that is a powerhouse!

 

- John

[01_Cummins_4x4]

235/85/16 = 31.7x9.3/16

245/75/16 = 30.5x9.6/16

265/75/16 = 31.6x10.4/16

 

You're pretty much in line with the 265/75/16, just an inch narrower tire.

 

What are your RPMs at 60 mph?

[jlwelding]

2k at 60 ,  egt's dropped 200 degrees. I was 800 degrees at 60-65. Now 600 - 625. I pulled 21k loaded with hay and it didn't faze it a bit. The hottest egt's got was a little over 1k, course the turbo helped a lot.

[Mopar1973Man]

On 10/21/2024 at 4:11 PM, 01_Cummins_4x4 said:

235/85/16 = 31.7x9.3/16

245/75/16 = 30.5x9.6/16

265/75/16 = 31.6x10.4/16

 

You're pretty much in line with the 265/75/16, just an inch narrower tire.

 

What are your RPMs at 60 mph?

Correct. 

 

3.55 and 245s is 2k RPM at 66 MPH for my setup. Which is 3.69 final ratio.