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4th gear poping out, Evo 10 manual 5 speed

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Old Jul 13, 2017, 12:15 PM   #1
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4th gear poping out, Evo 10 manual 5 speed

Hi everyone,

Like mentionned in the title, I am having problems with my gearbox. I have a 2014 evo 10 gsr with 5 speed gearbox, stock power. I drive the car weekly and do a bit of track.

On the way back home from the track my gearbox jumped out of 4th gear 3 times. This happend under low load and high load but I can't find a patern, it just jumps out when it feels like to. This is the second gearbox I am having problems with and I don't know why.. (well I do, must be tracking the car !) But why does it wear out soo fast ? Does anybody have this problem?

I am having trouble to find any info on this. I only seem to find people wearing out there gearboxes on 500 hp track cars. I'm a fairly smooth driver and I don't thrash the gears like a madman. Can anyone shed some light here please ?
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Old Jul 13, 2017, 01:37 PM   #2
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It definitely shouldn't be happening. Only course of action is to tear it down and see what's going on.
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Old Jul 13, 2017, 02:23 PM   #3
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Yep as stated above the trans needs to be removed and opened for further inspection. Usually its a damaged synchro slider. But many possibilities.
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Old Jul 16, 2017, 11:50 PM   #4
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Thanks for your reply guys ! But does anyone know why this is happening? And has anyone had this problem allready?
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Old Jul 17, 2017, 09:20 AM   #5
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It's either an issue with the shift fork, selector sleeve, or the selector sleeve springs.
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