Pulling the big hills, the grades to the tunnel and any jeeping at all suggests the need for lower gears, 4.10 or even 4.56 or 4.88. 4.10s would be the correct match IF you lived in Denver and drove the hill once in a while, 4.10s would be the correct gearing IF you will NEVER go bigger than 32s. But reality suggests that we all want (at some point) bigger tires and better crawl ratios...

The shop you are talking to clearly knows nothing about what the industry would suggest for the correction of this problem, they may not even know how to do gear work (rule one, never have gear work done by a shop that does not do it everyday). Next the shop might be great with engines, but a 1000 HP motor will not overcome the need to slip the clutch. Gear ratio needs to be matched to the tire size moreso than engine torque or HP.

I do gear work everyday, solving this problem is what I do.

My suggestion is, if you see 33" or 35" tires in your future, go with 4.56s if 33" tire are the biggest you see going with. If you even invision 35s go with 4.88s gears.
You won't regret it. For the mountain driving you do, and having a 5th gear to shift into I'd do 4.88.

I do my gear ratio recomendations based upon how you see your jeep in the future, so you don't have to do this twice.
A set of larger tires and a sawzall are less expensive than doing gears a second time.

SD

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