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Does going from 3.73 to 4.88 gears in Rubicon D44's require.....

pnut

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In the old days, the gears were tied to a specific carrier inside the pumpkin. Meaning going from 3.73 to 4.88s required not only the gears, and a master install kit (shims, bearings), but also the carrier.

I am not sure how it works with the Rubicon electric lockers. If someone can comment if it's only gears and an install kit for this jump.

The shop I normally use for my work is quoting me 400-600 labor per axle.

Thank you.
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word302

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In the old days, the gears were tied to a specific carrier inside the pumpkin. Meaning going from 3.73 to 4.88s required not only the gears, and a master install kit (shims, bearings), but also the carrier.

I am not sure how it works with the Rubicon electric lockers. If someone can comment if it's only gears and an install kit for this jump.

The shop I normally use for my work is quoting me 400-600 labor per axle.

Thank you.
You don't need a new carrier. Also the JL Rubicons come with 4.10 gears.
 
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pnut

pnut

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You don't need a new carrier. Also the JL Rubicons come with 4.10 gears.
Except the 392 which is what I have incoming :)

Planning to run 37's and not sure yet 4.56s or 4.88s
 

word302

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Except the 392 which is what I have incoming :)

Planning to run 37's and not sure yet 4.56s or 4.88s
Definitely 4.88. You still don't need a new carrier. Just be careful with the skinny pedal. The torque those axles are gonna see can grenade them in a hurry if you're not careful.
 

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pnut

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Definitely 4.88. You still don't need a new carrier. Just be careful with the skinny pedal. The torque those axles are gonna see can grenade them in a hurry if you're not careful.
Yep, true. the higher the number, the weaker the gear. Plus the 37s won't be doing any favors over 35's or the stock 33s.

I struggled so much to stick with 35s and be sensible, but the 37s won out.
 

word302

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Yep, true. the higher the number, the weaker the gear. Plus the 37s won't be doing any favors over 35's or the stock 33s.

I struggled so much to stick with 35s and be sensible, but the 37s won out.
The gears will be far from the weakest point in those axles. I have 5.13s and the pinion is massive. Twisting axle shafts and exploding u-joints is far more likely than ever breaking a set of gears.
 

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What do you mean when you say "skinny pedal". I haven't heard that term before.
Gas pedal...cause in the old days it was narrow and long while the brake is wide and fat in comparison.

Jeep Wrangler JL Does going from 3.73 to 4.88 gears in Rubicon D44's require..... 1615611526895
 

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The gears will be far from the weakest point in those axles. I have 5.13s and the pinion is massive. Twisting axle shafts and exploding u-joints is far more likely than ever breaking a set of gears.
Agree, but the lower the gear (higher numerically) means less engagement surface between the pinion and ring gear which is a weak point, but certainly not the weakest. As you said, u-joints, axle splines, and housings will be the break points.
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