Join Date: Jun 2010
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I also re-geared for my 35's so that I could better pull a loaded hay trailer, and just generally go easier on the transmission. I went with Yukon 4.11's in my truck, and love the way it pulls. Just hauled a load of steel pipe, about 14k pounds, back for 3.5 hours and it was a night and day difference. Never did the truck feel like I had to put my foot down to climb a hill, and starting from a dead stop felt so much better on the transmission.
I don't think the change from 3.42's would justify the price of re-gearing. I can try to send you a video of how it shifts and goes through the gears with the 4.11's if you're curious, but personally, that's exactly how a cummins was designed to be run. Remember also that any big hills you go up, you will have to go down as well, and the exhaust brake is much more effective with the new gearing as well.
An additional point to be made, but with the Yukon gears, you will need a new carrier for the front that has a different deck height. I called Randy's to verify when I did my install as I wasn't sure if the shop was trying to pull a quick one, but they validated. You may want to check and see if AAM gears require the same thing, as if they do not, that will save you about $400 versus my Yukon install.
Let me know.
2016 RAM 2500 Mega Laramie, Carli 2.5 Pintop Kit, Upper/Lower Stabilizer, Carli Torsion Sway Bar, 4.11 Yukon Gears, 35 Nitto Ridge Grapplers