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Discussion Starter #1
Hi,

I have a 2014 Polaris scrambler 1000 with some customizations on it. I have 28" tires and a 2 inch lift kit.And it has a weird problem. And this problem has happened before. For some reason when ever I stomp on the throttle, it makes a really loud grinding sound coming from the transmission, and once i get up to speed the grinding sound stops. but it does it everytime i stomp on the throttle. And it does it whenever i slow down really fast. And it does it whenever i go through the mud. It is really obnoxious and annoying. But whenever I install a new transmission, the grinding seems to stop and the atv will run normally. But after about 3-4 months the grinding starts again out of no where. I just got done installing its 4th transmission.And the atv is running fine again. But I'm pretty sure the atv is going to start doing the same thing again in a few months. Ive heard about performance clutches that I can get but i don't know if thats the problem. If anyone knows what this is, please let me know how to fix this problem


Thanks
 

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Yes I've been replacing the whole transmission. And the clutches too.


I hate to say it but if you’ve put 4 transmissions in and 4 clutches then you must be installing something incorrectly. I can’t think of any thing else that would cause that. Is there oil in the trans??


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So I am a little lost and I just want to understand somethings. So rather than disassembling the transmission and evaluating if anything is actually breaking, your actually replacing the entire transmission as an assembly? So, the transmissions are actually quite simple to work on. A simple service manual explains the disassembly, inspection and assembly procedures pretty good. The only thing I could possible think of is there is an oil deflector plate that is held in place by 2 screws. The drive chain rides right over top of them very close. Could it be possible these screws never had thread locker applied to them and are slowly backing out? But it wouldn't make since that its only under a higher load than just a slower acceleration rates. Maybe something is shifting? That's where a good disassembly and inspection would be good to see if and where the problem is. As far as clutches go, I'm not a good one with a grinding noise. Now squealing, just experienced that on my 850 and i needed to rebuild the secondary.

Also, do you know the torque specs on your clutches? The only reason why I am asking is I didn't know the spec on the secondary and I actually over torqued it and caused the helix to contact the plastic inner cover as things heated up.
 

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Discussion Starter #8
Thank you for all of your responses. And i don't know the specs on the clutches i just know that everything is stock other then the tires and 2 inch lift.
 
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