Diffs and final gear. - Yamaha Kodiak 700 Forum
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post #1 of 9 Old 11-24-2019, 07:08 PM Thread Starter
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Diffs and final gear.

Just dropped the oil from my diffs and final gear as they were due for their first oil change. Is it necessary to replace the drain bolt gaskets if they show no signs of damage? Also does the rear diff and final gear both fill from the same spot?
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post #2 of 9 Old 11-24-2019, 07:47 PM
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What year is your Kodiak? No you do not need to replace the copper sealing washers. And it’s been awhile since I replaced mine but it fills from the top and there is a side plug that you remove which is the full level. Fill until the oil come out of the side plug hole. It’s all in your owners manual.
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post #3 of 9 Old 11-24-2019, 08:03 PM Thread Starter
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Mine is a 2020. I read the manual but it isn’t real clear about filling the rear diff. The fact that the final gear and the rear diff each have their own drain plug made me wonder a bit.
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post #4 of 9 Old 11-24-2019, 08:14 PM
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The final gear and rear diff fill from the same port. However there is a plug that you take out on the side of the diff that is the full plug. You fill until fluid is running out of this plug and then you are done.
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2016 Kodiak 700 base model with a few SE parts CV boot guards, receiver hitch, Grizzly bars. Trail Tech Striker speedometer/voltmeter. 501 Parts Electric Grabber locking diff
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post #5 of 9 Old 11-26-2019, 12:18 AM Thread Starter
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Thanks Jim
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post #6 of 9 Old 11-26-2019, 09:13 PM
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Garage
https://youtu.be/rqgZhOE4gbs

pretty straight forward. this may help

the rear is a little different because of 3 bolts to take out, vs 2 in the front.

<:: 2018 Kodiak 700 Base ::>
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post #7 of 9 Old 11-26-2019, 10:19 PM Thread Starter
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I got it done but the Kodiak has drain plugs for the final gear and rear diff. This video only shows him using one but I suppose both will drain from one drain port. I removed both to make sure.
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post #8 of 9 Old 11-26-2019, 10:37 PM
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The drain towards the front of the diff will drain both sides of the diff. There are times that you won't have to change out all the oil so that is what the one nearest to the rear is for. If you ask me it is a dumb design for what little bit more oil you have to use but some engineer bean counter probably figured that Yamaha could save a few cents and charge you the same. Who knows for sure.

2016 Kodiak 700 base model with a few SE parts CV boot guards, receiver hitch, Grizzly bars. Trail Tech Striker speedometer/voltmeter. 501 Parts Electric Grabber locking diff
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post #9 of 9 Old 11-26-2019, 11:39 PM Thread Starter
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Sure agree with the dumb design. For the few ounces of oil I would rather just change it all
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