Preffered towing transmission and axle ratio

Bob57 · Jan 16, 2017

yeah - I spelled that wrong, but the packers just scored....

***

Building a ’17 RAM 2500 Laramie CC 4X4 w/ Cummins in the ramtrucks.com website. It’s pointing me to the 6-Speed Automatic 68RFE Transmission and 3.42 Axle Ratio. I’ll be towing a 9000-10000lb travel trailer. Is this the recommended transmission and axle ratio for the 6.7-Liter I6 Cummins® Turbo Diesel Engine to tow a 10K lb trailer?

Thanks,

Bob

2015HD · Jan 16, 2017

Just went an played with tool, looks like 3.42 is your only choice with the Cummins. Funny, the Aisin tranny is not an option any longer? I built my dream truck a few months back and it was available.

2015HD · Jan 16, 2017

My bad, my dream truck was a 3500, you apparently can't get the Aisin in 2500.

SouthTexan · Jan 16, 2017

The 3.42 axle is the only ratio in a SRW with a Cummins regardless of transmission. Only DRW trucks with the Aisin have the 3.73 or 4.10 gears option with a Cummins. A 9-10k travel trailer would be a walk in the park for the Cummins with the 68RFE and 3.42.

Here is a video of a 2500 Cummins 68RFE with 3.42 gears towing over 12k up a mountain road in high altitudes.
[yt]AMhAM4dBgnQ[/yt]

Bob57 · Jan 20, 2017

Thanks!

brandonjansen · Jan 20, 2017

As SouthTexan stated, a 68rfe and 3.42 gears are your only option in a 2500 Cummins. To get the Aisin you'd have to go up to a 3500 and to be able to change the gear ratio from the factory you'd need to order a DRW.

BBRAM2500 · Jan 20, 2017

I have the the 68rfe and i got the offroad package and was told i got the 4:10 but ive never checked personally

brandonjansen · Jan 20, 2017

BBRAM2500 said:
I have the the 68rfe and i got the offroad package and was told i got the 4:10 but ive never checked personally

In a hemi equipped truck that would be correct but with a Cummins they're all 3.42's unfortunately. That's been the case for all 2013+ SRW Cummins equipped trucks. Definitely a disappointment in my opinion. I'd like to see the Aisin and 4.10 gears available in a 2500. That would be my ideal setup.

SHOOT2KILL · Jan 20, 2017

An upgrade to the 4.10 gear is the best $50.00 option ANY truck owner can make. Unfortunately the dealership douches who do the ordering have NO CLUE what REAL truck people need......

SouthTexan · Jan 20, 2017

brandonjansen said:
In a hemi equipped truck that would be correct but with a Cummins they're all 3.42's unfortunately. That's been the case for all 2013+ SRW Cummins equipped trucks. Definitely a disappointment in my opinion. I'd like to see the Aisin and 4.10 gears available in a 2500. That would be my ideal setup.

Although the 3.42 pulls like a champ, I wouldn't mind having the option for an Aisin with a 3.73 in a 2500 either.

Preffered towing transmission and axle ratio

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