TSB about ABS sensor faillure due to diff oil contamination

PZKW108 · **Joined:** Sun Apr 06, 2014 5:23 pm **Posts:** 461

Anybody got info about this ?

WWDiesel · **Posted:** Tue Oct 29, 2019 10:01 pm

PZKW108 wrote:

Anybody got info about this ?

2005 Jeep Liberty Service Bulletins http://www.jeepproblems.com/models/liberty/tsbs/2005/
ELECTRICAL SYSTEM
TSB ID #0804805
JEEP SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. REAR AXLE FLUID MAY CONTAMINATE THE DIFFERENTIAL MOUNTED REAR WHEEL SPEED SENSOR. *SC UPDATED 3/17/09. CSC LETTER WAS RECEIVED. *PE

NHTSA ID
10017002
TSB ID
0804805

flash7210 · **Posted:** Wed Oct 30, 2019 9:27 am

Hmm...

This is probably a good reminder to pop the rear diff cover and drain/clean all the old stuff out and refill with fresh oil.
Also to check the condition of the breather tube. I was in some deep water last month.

WWDiesel · **Posted:** Wed Oct 30, 2019 1:08 pm

flash7210 wrote:

Hmm...
This is probably a good reminder to pop the rear diff cover and drain/clean all the old stuff out and refill with fresh oil.
Also to check the condition of the breather tube. I was in some deep water last month.

Speaking of deep water, and PM's.
there is a very short factory vent pipe on top of the transmission that just vents to atmosphere.
The factory OEM vent on top of the transfer case connects to a rubber hose and goes all the way to a high point on the firewall.
Why in the heck the factory bean counters did it this way is beyond me! :shock:

The transfer case vent hose passes right by the transmission vent location.
When I first got my Liberty, I cut this long vent hose in the area above the transmission, added a brass "Tee" in it, and then connected a short piece of rubber hose to the vent on top of the transmission and put clamps on all the connection points.

If you have not already done this simple and very cheap mod, and think you will be traversing any deep water, you should consider doing it. :idea:

It may just save you a transmission! :juggle:

PZKW108 · **Joined:** Sun Apr 06, 2014 5:23 pm **Posts:** 461

Thanks for the link.

I think it might be my problem, I toped off the rear diff and had water in oil !

WWDiesel · **Posted:** Wed Oct 30, 2019 8:44 pm

PZKW108 wrote:

Thanks for the link.
I think it might be my problem, I toped off the rear diff and had water in oil !

How in the world did you get water in the oil of the rear differential; you been fording a bunch of streams or rivers? :shock:

PZKW108 · **Joined:** Sun Apr 06, 2014 5:23 pm **Posts:** 461

WWDiesel wrote:

PZKW108 wrote:

Thanks for the link.
I think it might be my problem, I toped off the rear diff and had water in oil !

How in the world did you get water in the oil of the rear differential; you been fording a bunch of streams or rivers? :shock:

I remember having a little too much fun during a flood this summer :JEEPIN:

PZKW108 · **Joined:** Sun Apr 06, 2014 5:23 pm **Posts:** 461

I drained and refilled the diff with new sensor in and it's working again.

The rear speed sensor had been replaced 4 months ago, looks like the water in the diff oil could have played a role here !!!

TSB about ABS sensor faillure due to diff oil contamination

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