[sanghill]

Refer to Post #10:
Replaced the front left wheel hub which includes the tone ring.
The wheel speed sensor was ok and did not need to be replaced.
Mechanic used a WiTech to view the wheel speed sensor wave form which showed the problem.
The tone ring is broken which was the problem. It is a magnetized ring. The tone ring is easily removed but is not available as a spare part.

 

[Mark_]

Refer to Post #10:
Replaced the front left wheel hub which includes the tone ring.
The wheel speed sensor was ok and did not need to be replaced.
Mechanic used a WiTech to view the wheel speed sensor wave form which showed the problem.
The tone ring is broken which was the problem. It is a magnetized ring. The tone ring is easily removed but is not available as a spare part.

Well that's good news ! (I think ??). Mind if I ask... how much just for the hub ?

Nice t-shooting there from the tech.

 

[sanghill]

The hub with bearing, PN 4779869-AC, is $231.00 US from the dealer.
Should be less on-line but it is heavy so there may be high shipping costs.
My hub is still good, just need a new tone ring.
The tech had been to the FCA school near here and new his stuff.
He showed me the wheel speed sensor wave form on the WiTech, didn't mean anything to me, but it helped him.

 

[sanghill]

Found this interesting article: Wheel Speed Sensors: ABS and TCS Signal Use
The Cherokee uses a Magnetoresistive sensor.

 

[sanghill]

Refer to Post #21:
I think the rust on the inner circumference of the tone ring caused the ring to expand and crack.
If I removed the rust I think the tone ring would close the gap.
The rust is present because of fording streams.
So the right front hub is probably a disaster waiting to happen.
Any opinions?

 

[sanghill]

Just found this in the Owner's Manual:
"If you must cross
flowing-water, avoid depths in excess of 9 inches (22 cm).
The flowing water can erode the streambed causing your
vehicle to sink into deeper water. Determine exit point(s)
that are downstream of your entry point to allow for
drifting.
Standing Water
Avoid driving in standing water deeper than 20 inches
(51 cm), and reduce speed appropriately to minimize
wave effects. Maximum speed in 20 inches (51 cm) of
water is less than 5 mph (8 km/h)."
No wonder I have rust, I was probably fording MOVING water that was 15 inches deep.
It was up to the axles on the big trucks with 33 inch tires.
Note to self: read the Owner's Manual more often, good cure for insomnia.

 

[sanghill]

Probably going to replace the rear hubs. They should be really rusty also.
Refer to this video for replacing the rear hubs:

The tone ring for the front and rear are the same design.

 

[sanghill]

2014 V6 TH with 95K mile.
Replaced the LF wheel hub, it is rusty but has not broken the tone ring.
Checked the rear wheel hubs, they are rusty also, but still work ok.
The hubs bolt onto something, they are designed to let water in between the hub and whatever it bolts onto.
There is a drain so the water can drain out. They are bare steel so they will rust.
When I was in 4 low fording streams and getting water in the area of the tone ring and ABS sensor I didn't get any errors and everything worked fine.
So apparently water doesn't interfere with the ABS sensor pickup.
If you don't ford streams they probably don't rust as soon and don't break the tone ring.
You could remove the hubs at 100K miles, remove the tone ring, remove all of the rust and put it all back together again and be good to go.
As far as I can tell there is no way to protect the steel hub from rusting without interfering with the tone ring.
So if the new hubs last 95K miles I should be ready to junk the TH anyway.

Replaced the rear brake rotors, pads, clips and bolts.
The inboard side of the rotors was mostly corroded and not providing any braking.
Need non ceramic pads on the inboard side so the rotors will stay shiny. Some nice metallic pads should do the trick.

 

[JeepCares]

Hi, I have 2014 Trailhawk AWD. AWD don’t work now! FCA has recall to upgrade software for PTU. They “flash” your software. To lengthy to go into but Google W47 recall! Band aid approach! I need a New PTU $$$! Car drives fine still but is only two wheel drive now!

I am very sorry to read this! Were you able to get this resolved? Feel free to send us a message if we can help with anything.

Kaitlin
Jeep Cares

 

[sanghill]

I think the OP is despondent (pun intended), clicked on his logo and he hasn't been here in a month.
I don't think W47 applies to 2014 MY, only his VIN knows for sure.

Regarding my tone ring, could you have manufacturing coat the groove in the wheel hub with silicone grease prior to installing the tone ring?
Maybe this would delay the rusty wheel hub.
You can't remove the tone ring from the new hub without breaking the tone ring.
Four new wheel hubs and new rear brakes and I am back off road again.

Thanks for helping our forum, we need all the help we can get.
My Jeep dealer actually does a great job.