42re in "limp mode" - JeepForum.com

 
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post #1 of 11 Old 07-02-2011, 09:31 AM Thread Starter
technophat
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42re in "limp mode"

ok so there was this couch... It was abandoned and mocking me for a month. So I ran it over... Several times. It turns out that the couch got its revenge on my last pass. I tore out the wiring to my Output Shaft Speed Sensor and broke off the sensor itself. Seems easy right? Nope.

I went to a junk yard and acquired the replacement wiring and replaced the Speed Sensor. Still in "limp mode". I then replaced the Transmission Governor Pressure Sensor and the Transmission Pressure Sensor Transducer while I had the pan cracked (with a trans fluid and filter change of course).

Here's the extra info: CEL shows P1762 and P1763, I have checked all the fuses, and disconnected the battery after the parts install. By "limp mode" I mean that I am either locked into first gear, or that I have all the gears BUT first gear.

I'm going to need help with this one.

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post #2 of 11 Old 07-02-2011, 09:35 AM
elf517
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post #3 of 11 Old 07-02-2011, 09:44 AM
Dodgeram1989
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Well those are both codes for the Governor pressure sensor. Did you check the wiring running to them?

97 ZJ - Stock again
1976 Chief AMC 360 6 in lift, 35 inch tires

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post #4 of 11 Old 07-02-2011, 10:00 AM Thread Starter
technophat
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I'm not really sure how to check the wiring other than to visually look for problems, but a second look won't hurt anything.
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post #5 of 11 Old 07-02-2011, 01:12 PM
ratmonkey
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check the trans fuses. could have shorted when you mangled the wiring.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #6 of 11 Old 07-02-2011, 02:29 PM Thread Starter
technophat
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I'm aware of the fuse block near the passenger side kick panel, and the block near the battery under the hood. Are their more fuse blocks, or would the trans fuses be in one of those two?
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post #7 of 11 Old 07-02-2011, 02:44 PM
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it's in the power dist center. the one under the hood.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #8 of 11 Old 07-02-2011, 02:57 PM
gothchick
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If the wiring and fuses check out, I'd disconnect the battery. Might help to reset the PCM...

Don't fear the regear.

Finished 4x2 --> 4x4 conversion.
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post #9 of 11 Old 07-02-2011, 03:01 PM Thread Starter
technophat
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[IMG][/IMG]
All fuses check out, but the top left fuse (20amp Cooling Fan) has no fuse present and one of two contacts in place. Should there be a fuse here? (My interior blower motor is not working).

1997 ZJ Laredo, 4.0, 42re trans, 242 T-case
1994 ZJ Laredo, 4.0, 42re trans, NP231 T-case
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post #10 of 11 Old 07-02-2011, 06:56 PM Thread Starter
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ok I just re-checked the wiring, and it appears to be connected to everything that it should be connected to, and I disconnected the battery again for several hours with no change... "limp mode" ensues. I'm out of any intelligent ideas. The transmission shop vultures are circling and starting to drool. HELP!

1997 ZJ Laredo, 4.0, 42re trans, 242 T-case
1994 ZJ Laredo, 4.0, 42re trans, NP231 T-case
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post #11 of 11 Old 07-11-2011, 03:39 PM Thread Starter
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Update

Several days after I replaced the Governor Pressure Solenoid and the Pressure Sensor Transducer, my trans began to shift properly again. My best guess is that it took some time/miles to work the trans fluid into the new parts?? Can anyone shed some light on if this is a possible/likely reason, or if I still have a problem that may return?

1997 ZJ Laredo, 4.0, 42re trans, 242 T-case
1994 ZJ Laredo, 4.0, 42re trans, NP231 T-case
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