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ABS like noise when tire skidding on 4 low mode

tengg2001

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Hi

wondering where the noise could come from, or if it’s an issue.

I was using 4L driving in a slippery surface(snow, mud). When a front tire skid(I figured I shouldn’t use 4L on snow or mud, too much wheel torque), the ABS like noise happens.. is it fro differential or somewhere else?

thanks.
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jludave

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jludave

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azwjowner

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Why the brake kick in?
It's in your owner's manual (p. 300 for a 2022) under "Traction Control System":

"TCS monitors the amount of wheel spin of each of the
driven wheels. If wheel spin is detected, the TCS may
apply brake pressure to the spinning wheel(s) and/or
reduce engine power to provide enhanced acceleration
and stability. A feature of the TCS, Brake Limited
Differential (BLD) functions similarly to a limited slip
differential and controls the wheel spin across a driven
axle. If one wheel on a driven axle is spinning faster
than the other, the system will apply the brake of the
spinning wheel. This will allow more engine torque to be
applied to the wheel that is not spinning. BLD may
remain enabled even if TCS and Electronic Stability
Control (ESC) are in reduced modes. "
 
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tengg2001

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It's in your owner's manual (p. 300 for a 2022) under "Traction Control System":

"TCS monitors the amount of wheel spin of each of the
driven wheels. If wheel spin is detected, the TCS may
apply brake pressure to the spinning wheel(s) and/or
reduce engine power to provide enhanced acceleration
and stability. A feature of the TCS, Brake Limited
Differential (BLD) functions similarly to a limited slip
differential and controls the wheel spin across a driven
axle. If one wheel on a driven axle is spinning faster
than the other, the system will apply the brake of the
spinning wheel. This will allow more engine torque to be
applied to the wheel that is not spinning. BLD may
remain enabled even if TCS and Electronic Stability
Control (ESC) are in reduced modes. "
Thanks! But in the 4L mode, the traction control is turned off. That's why I'm also a bit confused.
I see the last sentence now! Thanks.
 

azwjowner

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Thanks! But in the 4L mode, the traction control is turned off. That's why I'm also a bit confused.
"BLD may remain enabled even if TCS and Electronic Stability Control (ESC) are in reduced modes. "
 

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mwilk012

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Thanks. How does the BLD work with LSD? I thought Rubicon comes with LSD.
Rubicon’s have open differentials with an electronic selectable locker. BLD is just a function of the ABS system that bridges the gap between needing lockers or not for a given scenario.
 
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tengg2001

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Rubicon’s have open differentials with an electronic selectable locker. BLD is just a function of the ABS system that bridges the gap between needing lockers or not for a given scenario.
Open diff on front or both? I remember I had to use LSD additives for axle fluid.
 

jludave

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Open diff on front or both? I remember I had to use LSD additives for axle fluid.
Both in the Rubicon.

You may have had a vehicle with an LSD rear, as an option, if it wasn't a Rubicon.
 

jessedacri

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Open diff on front or both? I remember I had to use LSD additives for axle fluid.
No LSD on Rubicon at all. BLD does a great job on the JL.

I don't use LSD additives in mine, but I don't think it necessarily hurts if you do.
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