Max speed with 4.56 gears, 35” tires, 2.5” lift

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LimitlessGOOB

New Member
Joined
May 15, 2023
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Location
KCMO
Just got new Yukon 4.56 gears installed on my 12’ JK Rubicon, manual.

The 4x4 shop that installed them mentioned they don’t recommend going over 65 mph or it could cause premature failure (even after break in period).

I took it back after install due to a concern of noise from the rear diff. Tolerances we’re still in spec but the coast side has a loud ‘whirring’ noise. Only about 85 miles on new parts so far.

Is their advice of 65mph or less legit?

Any comment/info is appreciated. Thanks
 
LimitlessGOOB said:
Does that mean I can go surplus 65? Should I be concerned about the noise?
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So long as the speed limit and conditions are compatible with speeds above 65MPH, you can go above 65MPH. I don't know about the noise because there are too many possible causes.
 
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