Re gearing a Jeep (who is the go to shop for swapping gearing in axles)?

[Jeffrey Lebowski]

I have 37s on my 4.5in 2012 4-door…. as I still drive it 80mph on the 470 quite a bit.

Wow.
I could barely get my STOCK (2009) 4 door Rubicon up to 80mph on a flat road.

[Brian]

Wow.
I could barely get my STOCK (2009) 4 door Rubicon up to 80mph on a flat road.

The pentastar (2012+) engine really made a difference for the 4door. First time I drove it it was like night and day.


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[Jeffrey Lebowski]

The pentastar (2012+) engine really made a difference for the 4door. First time I drove it it was like night and day.

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Mine was such a dud. Always in the damn shop. Bought it new with the "lifetime" powertrain warranty, which was worthless.
It makes me sick, it was my 6th consecutive jeep… and last. (Edit: And other than 2 CTDs which were "extra" cars, I'd only owned jeep to that point, excluding my wife's cars and even she had one at one point).

But I have many friends who had great luck with JKs.