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J
4l80e failing after going on overdrive
Well I'm all ears lol. It's gonna be a couple of weeks when I get to it plus I'll have to order stuff form the US, I'm living on mexico at the moment and parts are some what scarce or way to expensive where I'm located. So yeah I'm all ears for recommendations.- jfge8618
- Post #10
- Forum: Transmissions
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J
4l80e failing after going on overdrive
Well I did all of this and it seems the damage is done still getting the same symptoms it does change gears smother tho. But I think the torque converter is fried.- jfge8618
- Post #8
- Forum: Transmissions
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J
4l80e failing after going on overdrive
Finally I got to check the valve body and came to find out it didn't have any gaskets neither the upper lower or the acumulator. I went ahead and cleaned the entire thing and checked all o-rings and filters etc seem in really good condition. I managed to get a set of gaskets ill put those in...- jfge8618
- Post #6
- Forum: Transmissions
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J
4l80e failing after going on overdrive
Well I did test all selenoids and all of the tested ok. I also tested the pressure switch and I'm getting higher ohms reading on PRND43 switch between 8 to 20 and rest of the positions read between 3 and 5 at max So I'm guessing I'll be replacing that too... And I have not had chance to...- jfge8618
- Post #5
- Forum: Transmissions
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J
4l80e failing after going on overdrive
Hey there, I went ahead and ordered a harness, I have the valvebody off I'm in the process of testing the selenoids and tcc valve I'll be rigging a pump to do a vacuum test. All of them clic once jumping them on 12v but the epc selenoid I noticed it gets warm ver quickly and also noticed on the...- jfge8618
- Post #3
- Forum: Transmissions
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J
4l80e failing after going on overdrive
I got a 2002 sierra 6.0 with the 4l80e, the truck runs good until it catches the overdrive after slowing down the truck seems its not dropping gears. if I get to a full stop it wants to stall. The other thing is that reverse barely catches after and slips quite a bit after it goes on O/D. But I...- jfge8618
- Thread
- 4l80e
- Replies: 9
- Forum: Transmissions
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