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Running 40's with Dana 44s

MattyB

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Thinking about running 40s also eventually. How'd the mods go?
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Kindafearless

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I’m still running 40s successfully on my stock housing. I did end up swapping to 5.38 gears. Those feel really good.

Biggest weakness I’ve seen so far is they beat up your suspension bushings. If you are off-roading a lot, expect to do a rebuild every couple years. That’s on RK’s suspension. Takes an afternoon if you have a press and a vice.
 

BlueScapegoat

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I've been running 40s for a year now, hydro-assist is a necessary upgrade in addition to the obvious axle shafts etc imo

And also I think 40s don't fit. 39s maybe. 40s get into structure without excessive bump-stopping

Jeep Gladiator Running 40's with Dana 44s PXL_20250928_213717200
 

3VOLVE

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On my JTRD, I’m running 40” Cooper Discovery on stock Dana 44s front (RCV 300mm solid CV shafts, 4.56 Revolution Gears, Artec trussed and gussetted front, PSC steering), stock rear, Adam front and rear driveshafts, all on KMC Riots 17x9 (-18).

A group of us just completed a cross country trip in August from Virginia to California‘s Rubicon Trail, back through Colorado; the JTRD did well beyond my expectations. I’ll fix things as they break, but I’ll keep having fun until they do!

BTW, what’s the status/updates on your build?
Jeep Gladiator Running 40's with Dana 44s IMG_1321
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