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Center diff mesh?

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Old 09-02-2018, 10:30 PM
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Default Rear* diff mesh?

Alright fellas, been at this center diff for hours now and nothing but problems I am on my last leg before I send it through the wall. First time I close up the center diff housing, noticed axel wouldn't spin. Opened it back up, seemed to just get the mesh a bit better through the grease and sealed it back up. All was good, axel spinning with the gears so I continued on. Got all my other stuff put on, rear shock tower, a arms and a bunch of other things nicely screwed in. As I am getting ready to call it and clean up, I spin the damn mesh and now it doesn't catch on the pinion to spin the axle. Any tips on how to get over this hair pulling mesh issue, i mean it was binding when I sealed up the housing I have no f ing clue how it just suddenly stops catching the gears. Spent 3 hours with issues on this damn Serpent center diff. Please help...obviously I'll probalby have to undo all the work I just did and open up the housing, but how do I stop this from happening again. Thanks all help is appreciated sorry if I seem agitated, I am.

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Old 09-02-2018, 11:03 PM
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Now it seems to be meshing??? Idk gentlemen, does it seem like it's slipping to you or am I just an idiot???

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Old 09-03-2018, 12:59 AM
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Originally Posted by CBren32 View Post
Now it seems to be meshing??? Idk gentlemen, does it seem like it's slipping to you or am I just an idiot???

https://www.youtube.com/watch?v=mn-28O1gz44
the rear diff mesh sounds extremely tight, could be the front.
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Old 09-03-2018, 08:12 AM
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Originally Posted by iplaygames View Post
the rear diff mesh sounds extremely tight, could be the front.
So you think that the actual diff drives are mixed up and I should switch? Aren't they both the exact same? Title is mistyped, meant rear mesh.
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Old 09-03-2018, 09:26 AM
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Your front or rear diff is shimmed too tight. Add shims to the opposite side of the crown gear to loosen the mesh.
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Old 09-03-2018, 09:33 AM
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Originally Posted by stephen_bess View Post
Your front or rear diff is shimmed too tight. Add shims to the opposite side of the crown gear to loosen the mesh.
So no way around opening up the housing correct? Kind of an annoyance, I very much dislike Serpent's setup manual they've had 6 parts left out already, 2 shims and 4 screws missing. I've seen better.
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Old 09-03-2018, 01:28 PM
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? Only way to shim a diff is to open the housing and add or remove shims.
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Old 09-03-2018, 02:36 PM
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Originally Posted by stephen_bess View Post
? Only way to shim a diff is to open the housing and add or remove shims.
...no $hit...i'm saying that i used less shims then what was directed in the manual due to them not supplying them, so not sure how it would be over shimmed ... anyways appreciate the help

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Old 09-03-2018, 11:47 PM
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What the manual says is just a guide, if the diff is to tight then itís over shimmed, take off all shims and try again, then add one shim as needed, should only have a tiny bit backlash when perfectly shimmed
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Old 09-04-2018, 01:11 AM
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Thatís extremely tight. I know on my truck the front and rear gears are completely different and color coordinated but Iíve got losi. U may want to get the gears out and count teeth to make sure they are not different cause Iíve had my mesh extremely tight and it didnít roll like that. It almost looks like the teeth are meshing wrong for each other but who knows maybe a way over tightened mesh will do that.
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Old 09-04-2018, 08:49 AM
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Originally Posted by Matt Piva View Post
That’s extremely tight. I know on my truck the front and rear gears are completely different and color coordinated but I’ve got losi. U may want to get the gears out and count teeth to make sure they are not different cause I’ve had my mesh extremely tight and it didn’t roll like that. It almost looks like the teeth are meshing wrong for each other but who knows maybe a way over tightened mesh will do that.
Thanks for all the help fellas, both the front and rear were 43 teeth so probably was just shimmed wrong on my behalf. Going to take it out tonight and see what I can do for the mesh. Is there any typical (for lack of a better word) amount of play for the rear/front diffs? Like 1-2mm of play, or less? Also, after more investigation, it seems that the drive shafts are spinning on each tooth pass, which is good but it does still seem a bit tight. OH and please note, I am running 100k center 60k front/rear so that will also cause for the heavy spinning. just not sure it should be that hard. Thanks again, huge help from everyone so very much appreciated.
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Old 09-04-2018, 10:10 AM
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Updated video for you guys to go off of:

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Old 09-04-2018, 10:47 AM
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thats WAY to to tight, it should be able to turn with a hint of noticyness somewhere around the gear like most cars.
watch this, his spins nicely and he mentions a tight spot, which is perfect for new gears.
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Old 09-04-2018, 01:35 PM
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Diffs can take some time to get right....
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Old 09-04-2018, 02:19 PM
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Originally Posted by token View Post
Diffs can take some time to get right....
For sure, going to try and fix it up tonight. Thanks for the help, fellas. Will post if I run into more problems, which I probably will
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