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Unread 03-16-2011, 07:54 PM   #1
zte87
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p0720 output shaft speed sensor!

what all happen when your output shaft speed sensor in now working like it should? I don't have any cel but my jeep has a stored p0720 code and waundering what all I might fix with replaceing it!

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Unread 03-16-2011, 10:51 PM   #2
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The output shaft speed sensor is needed for proper trans shifting ( mainly governor pressure sensor ) If this sensor fails the PCM will use the vehicle speed sensor as a back-up. Main type of sensor failure would be an open circuit or inoperative sensor, which would make the trans stick in 1st gear. Its hard to say how your sensor has failed, but if you have issues with shift timing, or lack of upshifts, there is a good chance its related to the sensor.

Keep in mind this is the sensor thats on the O/D housing, not on the transfer case. Its right behind the pan on the drivers side and points slightly down and outward. The 2-wire sensor has a Hex built on it and it screws in/out.
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Unread 03-16-2011, 11:08 PM   #3
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when you say stick in first do you mean longer than normal or just won't sift out of first!
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Unread 03-16-2011, 11:18 PM   #4
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Well, if the sensor failed completely or all the time, you would not have a shift. If the sensor is producing erratic, or intermittant signals then you will probably get upshifts, but they may be delayed or erratic and intermittant.
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Unread 03-16-2011, 11:34 PM   #5
zte87
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it does seem to take a while to get out of first gear and it also with down shift out of no wear! I called the parts store and they telling my the part they have is 35 bucks and that sensor is held in by one bolt! is it supposed to be a screw in deal? If any one can post up a link to the right sensor that would be asome I don't want to end up with the wrong one! my rig is a 96 4.0 gc Laredo thanks you guys!
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93 jeep yj bds 5 inch springs 5/8 boom shackles in the rear, locked front and rear dana 44/60 with front and rear chromoly shafts full cloak armor and 40 inch toyo's
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Unread 03-17-2011, 12:24 AM   #6
jnicewan
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Here is the output shaft sensor.



Here is where it goes, its the tan/black sensor on the lower/right part of the trans. That sensor is mounted on the Lower, LH side of the overdrive unit on the back of the transmission.


Here is the one that they probably quoted you, this is not the one you need! This sensor is mounted on the back of the transfer case.

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Unread 03-17-2011, 12:28 AM   #7
jnicewan
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Link didnt work, O-reillys has them, Dorman Part # : 917-602. Im sure other auto parts stores will carry them, along with trans parts shops.
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Unread 03-17-2011, 03:08 AM   #8
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I've broken several of these sensors while wheeling and find that the OEM replacement is more reliable than others.
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Unread 03-17-2011, 06:32 PM   #9
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thanks for the help guys! I picked up one and threw it on today! it seems to shift better now!
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93 jeep yj bds 5 inch springs 5/8 boom shackles in the rear, locked front and rear dana 44/60 with front and rear chromoly shafts full cloak armor and 40 inch toyo's
january 2013 yjotm winner!
2013 yjoty winner!
http://www.jeepforum.com/forum/f22/m...build-1272253/

94 jeep zj bb lift, 31-10.50-15 toyo at2s, magnaflow exhaust!
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