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Tennessee WTB 4.10 gear set JL Rubicon

crazyjas

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First Name
Jason
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Knoxville
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2021 JL 392
WTB 4.10 gear sets front & rear for my ‘21 Rubicon diesel. Thanx, Jas
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ItsNo4RE

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NJ
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21 JLU Willys/17 Ram 1500
WTB 4.10 gear sets front & rear for my ‘21 Rubicon diesel. Thanx, Jas
Was thinking about doing this as well but might jump up to 4.55. They're not that much brand new... its the install that gets ya
 

WheezysJL

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Jay
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Baltimore
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2019 Jeep JL Unlimited Rubicon
I have front and rear with 10k miles on them. 2019 JLUR
 

BuffaloBill

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Bill
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2018 Wrangler, 2014 Ram 1500 EcoDiesel 2020 JLUR Ecodiesel
Jas,

I too have a diesel, am runing 35”, and believe 4.10s will be optimum. Opinions vary as to what “optimum” means of course. I ocassionally pull a small offroad camping trailer and the additional 9.9% gear reduction will keep it in 8th gear a greater percentage of the time when traveling 60mph. If I had 37” I’d install 4.56.

Thanks to the videos posted here, I plan to do my own gear swap:

https://www.jlwranglerforums.com/forum/threads/diy-gear-swap-step-by-step-videos-rubicon-5-13.60887/

The Spicer master install kits run about $325 combined (front and rear for the Rubicon) with free shipping from Summit. So if you do it yourself, it can be done for not that much $.
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