Used Jeep Compass Locking Differential
Request a VIN-matched quote for a used Locking Differential. Availability, condition, warranty, and shipping are confirmed for your exact vehicle before purchase.
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Part Details
Your quote request is reviewed against your vehicle details. Before buying, ask for the condition description, mileage when relevant, warranty terms, shipping cost, and final price so you can compare the available options.
Quote status: Live stock and public prices are not displayed. Request a vehicle-specific quote to review the available option and its final terms.
Compatibility: Jeep Compass
Condition & Quality Standards
Condition grading and inspection practices vary by part and source. Before purchase, request the available condition description, mileage information when relevant, photos, and any inspection or test notes.
About This Locking Differential
Three quite different parts get sold as a locking differential, and picking the wrong one is the expensive mistake. An automatic locker swaps the open side and pinion gears for a no-spin unit that drives both axles together and lets one disengage in a corner when there is grip to allow it. It works forward and back, and its makers say plainly it is not a refined unit for a street car. A selectable locker drives as an open differential until you press a switch, then locks fully - nothing changes on the road until you ask. A factory locking axle is a third animal, wired in with its own warning light. Muddying it further, more than one manufacturer calls a limited-slip a locker in its own literature, so a build sheet is not proof of what is in the housing. Once type is settled, a locker is catalogued like any differential internal: axle model, side-gear spline count and gear ratio band.
Because every locking differential quote is matched to your Jeep Compass by VIN, you get a part that fits the first time and keeps your repair on budget.
Want the full picture before you buy? Read our limited slip and locking differential guide.
Before you order, it helps to read:
Common Signs Your Locking Differential May Need Replacing
- A selectable locker that will not lock, or will not let go again
- One wheel spinning uselessly with the locker switched on
- A bang or clunk through the axle as it takes up or lets go
- Cornering or take-up behaviour that has changed from how the vehicle always drove
- On an air locker, a compressor that keeps running, or an audible leak at the fittings
- A differential or traction warning light, or bright metal on the cover magnet
Symptoms vary by vehicle and driving conditions. Always confirm diagnosis before replacement.
What to Check When Buying a Used Locking Differential
- Settle the mechanism - automatic no-spin, selectable air, selectable electric or factory locking axle - they are not substitutes
- Match the axle model, side-gear spline count and gear ratio band - lockers are catalogued by all three
- Check the generation, not just the name - engagement designs were revised while the name stayed
- Confirm what is included - a selectable locker is a system rather than a single part
- On four-wheel drive keep front and rear ratios identical - a locked driveline cannot absorb a difference
- Book a differential shop to fit it - bearing preload, backlash and contact pattern are all set on installation
Ask for these details and any available photos before approving a purchase.
What Happens After You Request a Quote
- We review your vehicle and part request
- Provide your VIN or full vehicle details for fitment review
- Review the available condition, warranty, shipping, and price details
- You decide — no obligation to buy
Response time depends on the part, vehicle information supplied, and current sourcing options.
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Availability & Quote Details
- Live stock and public pricing are not displayed for this Locking Differential
- Available condition, fitment, warranty, shipping, and final pricing are confirmed only after we review your request
- Ask for warranty and return terms in writing before you buy
- Shipping options are confirmed for the destination and part size
Check Current Availability
We do not display unverified stock records. Send your VIN or year, make, model, and original part number so a specialist can confirm exact fitment and the options currently available.
How Pricing Is Determined
Pricing for used locking differential depends on several factors:
- Vehicle year, make, model, and engine configuration
- Mileage and overall condition of the donor vehicle
- Supplier location and shipping distance
- Warranty coverage offered
We quote rather than list prices. Type sets the band first, since an automatic no-spin unit, an air-operated selectable locker and an electric one are three products with three different pools behind them. After that it is axle detail - model, spline count, which ratio band the unit was built for - and how much of the system comes with it, because switches, solenoids, air lines and compressors are separate catalogue items. Send the VIN and axle tag, and say whether you want the locker alone or the hardware too.
Confirm the final price and fitment basis before approving a purchase.
Frequently Asked Questions
Is a locking differential the same as a limited slip?
No, and manufacturers themselves blur it - more than one calls a limited-slip device a locker in its own literature. A limited slip biases torque toward the wheel with grip while still letting the other turn. A locker drives both axle shafts together, either until a corner unloads it or on command. The limited-slip mechanisms are compared on their own page here.
Automatic or selectable - which one do I want?
It depends what the vehicle does the rest of the week. An automatic locker is always working and asks nothing of the driver, but its makers are candid that it is a blunt instrument on the road. A selectable locker behaves like an open differential until you switch it, which suits a truck that commutes then goes off-road.
Does a used locker come with the switch and actuator?
Not automatically, and this is where budgets get missed. Even new, an air locker is listed as the differential plus an activation switch, solenoid valve, air line and bulkhead fitting, with the compressor that operates it sold separately. Bought used, any of those can be missing. Ask what is on the unit and what you would still need.
Will a locker fit my open-differential axle?
Usually one exists for your axle, but the match is tighter than the axle name. Lockers are catalogued by axle model, side-gear spline count and ratio band - one air locker is listed for a Dana 30 with 30-spline shafts and ratios of 3.73 and numerically higher, with different part numbers either side of that split. Confirm your ratio and count your own splines.
My factory locking rear axle rarely locks - is the used unit faulty?
Probably not - that is how the design works. Eaton's mechanical locking differential, the factory automatic type, behaves as a light-bias limited slip in normal driving and locks only when it detects a left-to-right wheel speed difference of 100 rpm or greater, then unlocks on its own. Button-operated factory lockers are gated as well: Ram's manual allows the rear lock only below 10 mph and the front lock only in 4WD LOW.
Can I put a used locker in the front axle of my 4x4?
Yes, with conditions Eaton states plainly. For on-road use, an automatic locker in the front needs selectable locking hubs rather than auto-locking ones, and they have to be left open; Eaton says a vehicle with a locked front differential is unsafe on an improved road, causes substantial damage and makes steering extremely difficult. Ram's manual warns the same way and permits the front lock only in 4WD LOW.
Will a used locker break my stock axle shafts?
It moves the weak point onto them. Eaton notes a fully locking differential can put up to 100 percent of driveline torque through a single axle shaft, where an open, limited-slip or partially locking unit usually passes 50 to 70 percent, and says its locker designs handle more torque than the shafts they drive. Most Detroit Locker failures start as a broken axle shaft that then back-drives the internals.
If a used locker turns out to be worn, can it be rebuilt?
That depends on whether it is an original-equipment unit or an aftermarket part number. Eaton says OE Detroit Locker and NoSPIN differentials can be repaired, with components bought through approved service centres, but repair kits are not currently offered for its aftermarket part numbers. Get the number off the case before you commit, and note a few units require non-OE carrier bearings.
How is compatibility verified?
Provide your VIN or full vehicle details so you can review the fitment basis in your quote before approving a purchase.
What if the part does not fit?
Most suppliers offer limited return or exchange options. Warranty and return terms are confirmed before purchase.
How long does shipping take?
Shipping time varies by location, part size, and freight arrangement. Confirm the dispatch and delivery estimate in your quote.
