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Old 05-12-2022, 05:35 PM #16
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Is it throwing any codes. The symptoms point to a bad solenoid.
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Old 05-13-2022, 12:40 AM #17
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This exact thing happened to me and I posted it here but no one had a clue. 2000 limited multi mode. It's done it 3 times. Twice when starting from cold, it was like the torque converter just wasn't transmitting the power. I could rev it and it would barely move. Shifting gears fixed it and after a minute it came back to normal. I since did many thousands of km with it not returning. A month ago it did it again, with the engine warm in the middle of driving around the city, before going up a big hill... I limped up the hill with reduced power. Then less than a minute later it was fine again.

Last year I did a complete fluid change as per Timmy's video, using the good stuff recommended. Old fluid wasnt very bad. It has nothing to do with that.

People think solenoid? Why would it happen only 3 times over 3 years and 10,000 km, and only last a minute each time? Talk about an intermittent problem hard to diagnose...
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Old 05-13-2022, 10:08 AM #18
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This exact thing happened to me and I posted it here but no one had a clue. 2000 limited multi mode. It's done it 3 times. Twice when starting from cold, it was like the torque converter just wasn't transmitting the power. I could rev it and it would barely move. Shifting gears fixed it and after a minute it came back to normal. I since did many thousands of km with it not returning. A month ago it did it again, with the engine warm in the middle of driving around the city, before going up a big hill... I limped up the hill with reduced power. Then less than a minute later it was fine again.



Last year I did a complete fluid change as per Timmy's video, using the good stuff recommended. Old fluid wasnt very bad. It has nothing to do with that.



People think solenoid? Why would it happen only 3 times over 3 years and 10,000 km, and only last a minute each time? Talk about an intermittent problem hard to diagnose...
Extremely odd? So are you thinking transmission doing it or transfer?


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Old 05-13-2022, 11:35 PM #19
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Extremely odd? So are you thinking transmission doing it or transfer?


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Feels like transmission to me
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Old 05-14-2022, 10:02 AM #20
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Feels like transmission to me
Ok. I am wondering. If fluid condition has anything to do with this. Along with the screen filter? As these screens clog up. Reducing fluid flow that will in time burn the bands and clutch. Not to mention fluid being full of contaminants.

Granted, if the damage is done nothing will correct it. This is why I change my filter and fluid analog with cleaning my magnets every 100k.

I figure good lubricating fluid with a clean screen filter will let the transmission function as best as it can.

Well this is my theory anyhow.

And those folks saying their transmission died after fluid exchange transmissions where serverly damaged before the exchange of fluid. Their clutches were gone and all that material was in the fluid. Their bands were all burnt because the fluid pressure was to low with a clogged filter and Their fluid was sand blasting fluid.

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Old 05-14-2022, 05:21 PM #21
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No it isnt from bad fluid. Old fluid was fine. That wouldn't explain why it works fine 99.999% of the time and once a year it starts spinning out for a minute, and then magically fixes itself all of a sudden.
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Old 05-14-2022, 06:01 PM #22
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No it isnt from bad fluid. Old fluid was fine. That wouldn't explain why it works fine 99.999% of the time and once a year it starts spinning out for a minute, and then magically fixes itself all of a sudden.
Ok. What is it? As I don't believe in magically fixed transmissions. There has to be a cause to this. Your saying it's not the solenoids messing up. You saying it's not fluid issue or filter issues. So what could it be?

Or is it a transfer multimode issue?

I was just theorizing and trying to work through the issue.








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Old 05-14-2022, 06:42 PM #23
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The fact cycling the transfer case fixes the issue makes me wonder if possibly a failing/sticking transfer case switch is providing a false positive engagement? I have seen the detent switches cause weird shifting issues with the 4WD Systems of Tacomas, 4runners, and FJ Cruisers that have "old school" switches rather than ones internal to the actuator assemblies. I haven't had one cause quite the same issue, but I suppose it could be possible the actuator is getting "stuck" in a sort of limbo state because of a mis-reading switch?

I'm out of the house at the moment, but when I get some time today or tomorrow I'll check how that transfer case operates and see if there is a possibility one or more switches could cause it to do that.
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Old 05-15-2022, 01:25 AM #24
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Alright, had a few minutes to dig around and found a pretty good explanation of the VF3AM transfer case. I read through it a bit and I am wondering if your actuator is partially sticking and/or one of the 4WD switches is acting up. Going off the NCF documentation it seems like in 2Hi, the center diff lock is engaged, but it is disengaged as the vehicle shifts to 4Hi by way of the actuator. After that the physical shift lever engaged a different mechanism to engage the internals.

If I am reading this right (and it's possible I am not, got a bit of a migraine going tonight so it took a couple read throughs to absorb it...) then it could be possible that the vehicle is occasionally getting stuck in between engaging/disengaging the center differential lock and that's why cycling it all the way to 4Lo and back "fixes it." Would require some testing of the actuator and detent switches, I also can't explain why the vehicle would be getting intermittently stuck between a shift when a 4WD shift is not engaged. I do know that Toyotas like to put themselves in the selected 4WD mode when the key is cycled, i.e. if you turned the vehicle off mid-4WD shift it would try to resume the shift when you restart the vehicle (it's not a 100% thing, it's more just something they try to do), so perhaps because the actuator is sticky and/or a switch is finicky it could be thinking it hasn't completed a shift and is trying to get itself properly set?

That's kind of the only theory I have as to how the transfer case could be the cause of your intermittent issue, but my heads throbbing so I'll have to revisit this with a clearer head later.
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Old 05-16-2022, 04:14 PM #25
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Ok. What is it? As I don't believe in magically fixed transmissions. There has to be a cause to this. Your saying it's not the solenoids messing up. You saying it's not fluid issue or filter issues. So what could it be?

Or is it a transfer multimode issue?

I was just theorizing and trying to work through the issue.
Thanks. Yeah I think BlackWorksInc is on the right track. It is some issue with engaging weird. I assumed it was the transmission but I guess it could be the transfer case. When it works, it works fine. But 0.000001% of the time it doesn't work -- at all.
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Old 05-16-2022, 07:18 PM #26
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That's kind of the only theory I have as to how the transfer case could be the cause of your intermittent issue, but my heads throbbing so I'll have to revisit this with a clearer head later.
Damn good explanation with a migraine.
Now I'm wondering if shifting the transfer case over and over might solve the problem. Like rear locker and ADD you don't use them they act up.
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Old 05-16-2022, 07:38 PM #27
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I am suspecting the transfer actuators messing up. As I am not seeing anyone reporting this on the J shifter transfers.

I would think if the transmissions were doing it they would have failed by now or the issue would have been found.

This is just a guess though.

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