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04-21-2017, 01:51 PM | #16 | ||
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Re: Reset "Service 4WD" code?
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the drive train codes reset on each start. the light flashing means the feedback is wrong so need code .. what fluid did the transfer case have in it ? what did you put in it ? plugs are 15 ft lbs max torque no more.. |
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04-21-2017, 11:41 PM | #17 | ||
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Re: Reset "Service 4WD" code?
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04-22-2017, 10:54 AM | #18 | |
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Re: Reset "Service 4WD" code?
The code is C0379 - Front Axle Circuit. I guess it's time to replace the actuator?
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04-22-2017, 11:18 AM | #19 | |
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Re: Reset "Service 4WD" code?
the c0379 does point to the front diff locking actuator. what some have found is metal chunks interfering with the actuator operation. If you do use your truck down on the beach often as I do know friends that do this every nice weekend , the drive train does work extra hard in the deep soft sand , so you best do more fluid checking and replacing to avoid this type stuff..
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The Following User Says Thank You to j cAT For This Useful Post: |
yakkk (04-22-2017)
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04-22-2017, 11:22 AM | #20 | ||
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Re: Reset "Service 4WD" code?
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04-22-2017, 04:54 PM | #21 | |
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Reset "Service 4WD" code?
Any suggestions on removing a stuck actuator? It won't budge with vice grips on it. Can I heat the housing where the threads are? I'm just worried about heating the plastic nut surface.
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04-22-2017, 06:59 PM | #22 | |
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Tried heating it, no dice. Will have to wait till I can get it on a lift next week. Probably a good thing, I'm about to lose my mind. Also noticed Diff fluid is low, seals are wet. Other than that, life is good...
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05-04-2017, 02:00 PM | #23 | |
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Re: Reset "Service 4WD" code?
So I was able to get the old actuator out on a lift - the housing threads has corrosion in them so it was a b!tch to get the old one out, also had teflon tape on it.
I was able to stick my finger in the hole, press the actuator, and spun a tire to see the front shaft spinning, so it would seem that part is able to be engaged if the actuator is powered. Installed the new actuator, changed the fluid, buttoned it back up, and it's still throwing the same C0379 code. Is there an easy way to test the harness? Last edited by yakkk; 05-04-2017 at 02:41 PM. |
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05-04-2017, 06:13 PM | #24 | |
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Re: Reset "Service 4WD" code?
somehow I missed your other posts. the locking actuator replaced could be the wiring also when you changed the diff oil any metal ? you sure the teeth are good no debris interfering. put the old actuator to the connector , and see if it moves. if the actuators move it maybe the diff...
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05-04-2017, 10:14 PM | #25 | ||
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Re: Reset "Service 4WD" code?
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I'll try the old actuator to see what it does, also check the voltage on the plug. |
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05-05-2017, 07:08 AM | #26 | |
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Re: Reset "Service 4WD" code?
this code throws when the locking actuator does not engage in 10 sec or less... so very possible something interfering .. how did the gear oil look ? wiring connector could be corroded ..see if pins green ..
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05-05-2017, 10:22 AM | #27 |
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Re: Reset "Service 4WD" code?
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05-05-2017, 11:32 AM | #28 | |
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Re: Reset "Service 4WD" code?
the black means it was running very hot .. this can cause the gear teeth to crack/break.
when you fix this check the diff fluids because on the beach the diff''s work very much harder than in snow.. also drop drive shaft and grease the yoke with moly EP2 grease . |
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06-03-2017, 03:53 PM | #29 | |
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Jcat, I was able to get a TCCM from an 03 that was parted out at a body shop. Do they need reprogramming or can I just slap it in? (I still have to check the actuator harness but I'm thinking ahead)
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06-04-2017, 09:04 AM | #30 | |
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Re: Reset "Service 4WD" code?
I said before connect the actuator up with it out of the diff , see if it operates.
check connectors for any green or other corrosion . TCCM rarely fails and I am not sure but others have had to get it programmed .I doubt that is the problem because the codes say no. |
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