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A hum that grows with speed almost always means a worn rear wheel hub bearing. On the Grand Caravan 2008-2011 the fix is a bolt-on hub, not a press job. The rear hub bearing assembly for the Grand Caravan 2008-2011 matches OE number 512360, carries 5 studs on a 5 x 127 mm pattern, and has the ABS sensor built in. One hub, about 90 minutes per side.

What a rear hub actually does

The hub is the part your wheel bolts to. A sealed ball bearing inside it lets the wheel spin free, until water and rust creep past the seals and the metal gets rough. That roughness is the noise you hear.

The rear hubs on this van are non-driven, so there are no gears to touch. The job is four bolts, one axle nut, and a clean mating face.

The hum test: how a bad bearing announces itself

Tire noise and bearing noise get confused all the time. Use speed as the tell:

• Bearing hum climbs with speed and falls as you slow down, on any road surface.
• Tire noise follows the pavement — loud on coarse asphalt, quiet on smooth concrete.
• A failing bearing adds a rough growl, then grinding, then visible wheel play.
• Swap it while it still only hums. A seized hub at speed can lock the rear wheel.

Find the bad side with one quiet drive

Find a quiet road, get to about 40 mph, and listen.

1. Drive straight and confirm the hum is there.
2. Swerve gently left. If it gets louder, the right rear bearing is bad.
3. Swerve gently right. More noise now means the left rear is bad.
4. Repeat a few times. The side that gets louder on the opposite turn is your answer.

The logic is weight transfer. Turning left loads the right side of the van, so a rough right bearing groans louder. Confirm with the wheel off the ground: rock it at 12 and 6. Any clunk points to that hub.

ABS light with the hum? Same part

The wheel speed sensor for the ABS is built into this hub. ABS is the system that stops the wheels locking under hard braking. When the sensor goes bad, the ABS light comes on and the system shuts itself off.

Replacing the hub replaces the sensor with it. Read why that sensor matters in the ABS wheel speed sensor guide. Have the codes read first, though — a broken wire at the connector gives the same light.

Which hub fits your van

Both rear hubs on this platform share one part per side, left and right are identical. Here is how the KOEEP options split:

Hubs usually fail one side at a time, but the second side is rarely far behind. Doing both in one session saves a repeat teardown. Bearings, hubs and steering links for this platform live in the steering and suspension collection.

The 2012 split: do not order by year alone

Dodge changed the rear hub design for 2012, and 2012 shows up in both fitment lists. Match the part, not the calendar:

• 2008-2011 hub → OE 512360, round-style flange, hub pilot diameter 60 mm.
• 2012-2020 hub → OE 512493, rectangular flange, hub pilot diameter 85 mm.
• The ABS connector differs too, so the wrong year will not plug in cleanly.
• Wheel-side dimensions match, so the wrong one almost bolts on — until it does not.

If your van is a 2012, compare against the old hub before you order. The 2012-2020 rear hub with ABS covers the later design, and the left-right pair version is the better deal when both sides need work.

Replacing a rear hub: about 90 minutes

This is a bolt-on hub. No press needed, just a torque wrench and a breaker bar.

1. Loosen the lug nuts, then raise the van and support it on stands.
2. Pull the wheel and spray penetrating oil on the 4 hub bolts behind the knuckle.
3. Unplug the ABS sensor connector before anything else. Yanking it later tears the wire.
4. Remove the caliper and hang it on a wire. Do not let it hang by the hose.
5. Take off the caliper bracket, then the axle nut. A breaker bar makes this easy.
6. Remove the 4 hub bolts from behind and draw the hub off the axle spline.
7. Wire-brush the mating face on the knuckle until it is clean bare metal.
8. Slide on the new hub, start the bolts, and torque them to 41 ft-lbs (55 Nm).
9. Reinstall bracket, caliper and wheel. Torque the axle nut to 118 ft-lbs (160 Nm) and the lug nuts to 100 ft-lbs.
10. Plug the ABS connector in until it clicks, then pump the brake pedal before you move.

Use a torque wrench on the axle nut, not an impact gun. Impact-set axle nuts can crush the bearing and cut its life in half. Clear the ABS light by cycling the ignition after the connector is seated.

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