Confirm what I have/don’t have

[USMC-SSGT]

This should be a fairly short thread, but specific to my truck so search can’t help.

First appointment for re gear is not till January 25 so I’ve got time..

3.6 auto overland getting 4.88. The question is lockers. I had no intention to do lockers and can’t foresee a scenario I’d ever use them BUT… it adds basically parts for cost when they are in there now vs $1000+ labor down the road.

Didn’t want to do them because everyone says I’ve got limited slip in the rear which is great for the snowy north where I live. So considered them for the front.

Looked up my build sheet and found this:

So by the looks of this, it’s just a standard open differential and not limited slip correct?

Not entirely related- but despite “conventional” they all still included the BLD correct?

Lastly, and the reason for the thread.. if my truck in fact just has a plain old open diff in the rear, putting a locker back there will do nothing but enhance it correct? Without LSD, I’d be giving away nothing.

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[TroutFishingInAmerica]

Jack up your rear end, take off parking break, put it in neutral. Rotate a tire, if opposite tire rotates in opposite direction it's a open diff, if opposite tire rotation is same direction it's LSD. Everything Gladiator has BDL as far as I know. Yes, you're not giving anything away with a open diff. A upgrade to LSD or Locker will work seamlessly with the BDL.

 

[Aonarch]

You have an open differential. All JLs and JTs have BLD though. But that only kicks in if you are at a stop and really giving it gas. Then the system will identify the need for BLD and start engaging the brakes. You can also always two foot while offroad or in a tricky snow situation to "mimic" a locker as well.

You can always just go with a rear locker to save some money. That's what most 4x4s come with from the factory.

I'm not sure if anyone makes a LSD for the JL or JT, but if you are concerned with street traction over offroad, a LSD is a hundred times better than a rear locker or BLD. That is why I went Max Tow.

 

[Uparms]

It was an option on yours, take another look using your VIN on Mopar site.

• 2021 - ""The capable driveline of the Sport and Overland models include the Command-Trac NV241 part-time, two-speed transfer case, which features a 2.72:1 low-range gear ratio. In addition, an optional Trac-Lok limited-slip rear differential provides extra torque and grip in low-traction environments, such as sand, mud or snow""

https://www.mopar.com/jeep/en-us/sign-in.html

 

[USMC-SSGT]

It was an option on yours, take another look using your VIN on Mopar site.

• 2021 - ""The capable driveline of the Sport and Overland models include the Command-Trac NV241 part-time, two-speed transfer case, which features a 2.72:1 low-range gear ratio. In addition, an optional Trac-Lok limited-slip rear differential provides extra torque and grip in low-traction environments, such as sand, mud or snow""

https://www.mopar.com/jeep/en-us/sign-in.html

I may have to throw the jack under it to confirm. Looks like no however.

it does list- Command-Trac, but a search doesn’t turn up limited slip anywhere. Just the “conventional” front and rear.

To your other point. As my daily driver in New England. Snow handling and slick roads is my number one priority. I know a locker wouldn’t help me out in that department. It wouldn’t hurt it either. Sounds like If the option of adding an LSD is there, that’s the solid call however.

 

[Mac]

I put a Lockright in the rear of a GMC truck I had, it acted a lot like my current Trac Lok in the JT except it was noisy as the teeth clicked when you made turns. In the wet or snow both lockup and shift the rear sideways more noticeable at low speed or when taking off from a start and turning.
Not sure if the Lockright is available for the JT rear but the install was pretty easy, did it myself on the GM 10 bolt my truck had.

 

[jjdustr340]

Again only the Max Tow has a LSD.

My 80AE package includes Trac-lok

 

[Aonarch]

My 80AE package includes Trac-lok

Interesting.

 

[TimC]

Willy’s Sport (non maxi pad) option

OPTIONAL EQUIPMENT (May Replace Standard Equipment) Billet Silver Metallic Clear–Coat Exterior Paint
Customer Preferred Package 24W
17–Inch x 7.5–Inch Black Aluminum Wheels 32–Inch LT255/75R17C Mud–Terrain Tires Technology Group
Convenience Group
Cab Rock Rails
Trac–Lok® Anti–Spin Rear Differential

 

[Offroadnewbie]

I have the Willys and it has a limited slip and it cannot have max tow as an option.

 

[Terminus33]

Anti-Spin seems like a misnomer when referring to its use in very bad grip conditions like snow. It is supposed to add torque to the wheel with less traction but if both have equally low traction like on snow or ice then the anti spin just chucks power to both wheels and they both spin... no anti- there. lol. I had the GM equivalent on my 87 GTA and they called it Posi-Traction. It positively allowed me to lose traction whenever I wanted and toss it sideways in glorious smoke billowing fashion.

 

[USMC-SSGT]

Anti-Spin seems like a misnomer when referring to its use in very bad grip conditions like snow. It is supposed to add torque to the wheel with less traction but if both have equally low traction like on snow or ice then the anti spin just chucks power to both wheels and they both spin... no anti- there. lol. I had the GM equivalent on my 87 GTA and they called it Posi-Traction. It positively allowed me to lose traction whenever I wanted and toss it sideways in glorious smoke billowing fashion.

As the Detroit gods intended!

For my case, to clarify. This is mostly just walking about living in a snowy climate with my daily driver. Not necessarily having the ability to wheel through snow covered trails/dirt roads.

 

[Wheelin98TJ]

I like an open diff for snowy roads. Only spinning one gives you an anchor on the side not spinning. Goes straight really easy. You have to work to throw it sideways.

 

[ShadowsPapa]

Jack up your rear end, take off parking break, put it in neutral. Rotate a tire, if opposite tire rotates in opposite direction it's a open diff, if opposite tire rotation is same direction it's LSD.

Not true with these.
Mine has verified limited slip and I can rotate the left tire forward and the right turns the opposite way. These are not the old-school LSDs with heavy pre-load on them.
You can indeed turn these like an open differential. It takes a torque difference for it to lock and you can't do that by hand.


The build sheet will show if it's got limited slip.

Look for this in your build sheet under options - if that's not there, then you don't have it.


8-Spd Auto 850RE Trans (Make)
Anti-Spin Differential Rear Axle
3.6L V6 24V VVT Engine Upg I w/ESS

I never go by the window sticker........... only the build sheet.

And the incorrect "anecdotal information" on limited slip that is just wrong is amazing. I've owned limited slip vehicles since I was 14 - my first car, and I've had them and open diff vehicles since. I also live in Iowa and have driven my LSD equipped through deep snow in blizzards where other vehicles feared to tread. They have their weak points but in Iowa snow and crap - I'll take limited slip except on pure ice where all wheels are on the ice.

 

[TroutFishingInAmerica]

As the Detroit gods intended!

For my case, to clarify. This is mostly just walking about living in a snowy climate with my daily driver. Not necessarily having the ability to wheel through snow covered trails/dirt roads.

Just my opinion. Like you said, snowy climate, DD and not through snow covered trails/dirt roads. The best bang for your Jackson's (IMHO) is some premium studded snow tires.

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