Transmission sensor

[Clark]

Hey guys and gals
I had a hard shifting issue from first to second. So I changed my rear tranny speed sensor and at the same time
I changed my tranny oil and filter. BUT! I broke the plastic retainer piece that hooks on to the speed sensor. I mended
it together with some electrical tape and to my surprise my truck was driving and shifting excellent. So I took a 150 mile
trip this weekend to Philadelphia made it there with no problems. So I got in my truck to head home and my check engine
light came on and my tranny started the hard shifting issue again. I then found an auto zone and I stopped in to have them
give me a diagnostic with their code reader. It said check speed sensor wiring. Ok so I unpluged my negative battery clamp
and I went under and I unplugged the speed sensor wire. I plugged it back up tightly with another piece of tape and replaced the negative
clamp on my battery. I then drove off and my truck was running fine. Until I stopped for gas I restarted my truck after fueling up. And my check
engine light comes back on. My question to all is do I need to replace the speed sensor connector plug? And do you think that maybe the speed
sensor in the tranny needs replacing also? I'm afraid to go to a tranny shop because lets face it their attitude is YOU NEED A NEW TRANSMISSION!
Please folks I value your opinions What do you think?:roll:

 

[a0128]

The speed sensor located on the transfer case will cause a 1 - 2 shifting issue if the sensor is damaged or not connected properly. If you broke the retaining tab on the harness you are probably not getting a solid electrical connection to the sensor. The harness should be replaced. I believe the P/N is 15306187. Please cross reference with your dealer. I would also replace the sensor itself. P/N 19302667. If you change the sensor, don't forget to take the o-ring off the old sensor and put it on the new sensor before you install it.

What codes did the code reader return? Codes P0716 and P0717 point to the turbine speed sensor in the transmission. Here is a thread from www.hummerforums.com that lists the DTC codes. Very helpful!

https://www.hummerforums.com/forum/hummer-h3-17/code-p0340-2006-hummer-h3-25709/

What year is your H3?

 

[Clark]

Hey Thanks I too feel its the culprit of my problems. "Just keeping a sense of humor. lol
But today I was hosed by a chevy dealer for this connecting plug this little piece of plastic
cost $70 God I hope this works. To add to one's misery there are no returns on electrical parts. geez!!!

Oh and the code from auto zone was PO717. thanks

 

[deserth3]

Feel lucky you could get the connector. Other car manufacturers don't carry "pig tails" and they'll make buy the whole wire harness.

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[4speedfunk]

You can buy that plug at any number of places online. Search for "weatherpak" connecters. If you want to replace the speed sensor on the t-case, don't call a tranny shop...it takes five minutes to DIY.

Edit: You'll want to change the plug head rather than cutting & splicing on a new pigtail. Lots of info on YouTube about swapping these plugs (they can be tricky).

 

[Clark]

You can buy that plug at any number of places online. Search for "weatherpak" connecters. If you want to replace the speed sensor on the t-case, don't call a tranny shop...it takes five minutes to DIY.

Edit: You'll want to change the plug head rather than cutting & splicing on a new pigtail. Lots of info on YouTube about swapping these plugs (they can be tricky).

I had a problem with a Standard Speed Sensor from the auto parts store. I got it exchanged for another Then the replacement gave me trouble also. So I bought a new AC/Delco at the dealer. And finally it worked perfect. And I also bought an AC/Delco connection plug. "seen in the picture above" I had no choice but to buy these parts at Dealership ransom prices and install them quickly. I needed my vehicle I just don't like having to use my Mrs vehicle lol But thank you very much for enlighting me about the plug net info.

 

[4speedfunk]

Agreed. AC Delco sensors are the best. Ironically they usually come from Mexico, China, Taiwan, etc. Whatever the case...the aftermarket stuff rarely works for more than a month. I would only use them in an emergency or if I was selling the car within a week or two and need the check engine light off. -lol


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[Clark]

Agreed. AC Delco sensors are the best. Ironically they usually come from Mexico, China, Taiwan, etc. Whatever the case...the aftermarket stuff rarely works for more than a month. I would only use them in an emergency or if I was selling the car within a week or two and need the check engine light off. -lol


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Your so right the standard sensor from the auto parts read made in taiwan.