02 speed sensor

[Aceofspades]

How important is this to repair? It just started acting up before I planned on using the jeep for a long holiday cruises. The speedometer drops to zero when I left off the gas, but on throttle its a little less erratic
Only a couple times did I feel something odd during this. Felt like power cutting in / out from the rear end or driveline.

I'm only assuming it's not transmission related but the actual speed sensor itself

If it's affecting how the ecu controls the transmission or other comments I'll park it and take the 03. If it's just giving me an occasional incorrect reading I'll continue to drive it until the part stores are open after Christmas

Thanks

 

[Billwill]

How important is this to repair? It just started acting up before I planned on using the jeep for a long holiday cruises. The speedometer drops to zero when I left off the gas, but on throttle its a little less erratic
Only a couple times did I feel something odd during this. Felt like power cutting in / out from the rear end or driveline.

I'm only assuming it's not transmission related but the actual speed sensor itself

If it's affecting how the ecu controls the transmission or other comments I'll park it and take the 03. If it's just giving me an occasional incorrect reading I'll continue to drive it until the part stores are open after Christmas

Thanks

Have a good look around the sensor on the rear diff. There are known problems with the connector itself making a bad contact and also lots of issues with the nearby wiring touching onto the chassis or parking brake cable.
With throttle on hard the chassis could be bucking upwards a bit up front so the cable scrapes less on the nearby parts hence less problems.

 

[Aceofspades]

Thanks. I'm gonna check it out which means laying in snow slush
I have to see what the connector end looks like because advance auto sells 2 types of sensors and 2 harness. One harness is $32 and the other $6.


Normally I wouldn't mind driving the next 300 miles with a half working speedometer but if the ecu for the engine or transmission uses that info I don't want it to affect the drivability
Which I swore I felt something odd a few times last night when it was acting up

 

[Aceofspades]

And you're right. Both wires rubbed against the ebrake cable making a clean cut.

Bigger problem - sensor is broke clean off.

Can you pop this out from inside the diff by removing the cover ?

 

[tjkj2002]

Can you pop this out from inside the diff by removing the cover ?

Yes you can.

 

[Aceofspades]

Excellent.
What a day. That new gear oil in 20* weather came out like honey. For only 5k miles she was kinda greenish looking. Going to stick with non synthetic again. Looks like it was doing well
Sensor popped right out tapping it from the inside

 

[Aceofspades]

Here's the pictures of carnage

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And the new part with my heat shrink and connectors

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[ltd02]

Yep, can't fix that with duct tape...