Could you take a quick peek while the diff cover is still off? - JeepForum.com
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Unread 03-20-2015, 09:01 PM   #1
geofri
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Could you take a quick peek while the diff cover is still off?

Hey Fellas,

Still working on the suspension advice, but needed a break for a fun easy project without waiting on parts, so finally changing diff fluid. Yes... should have happened first week of ownership


I've felt this slop if I surge and ease up on the gas. This is the first time seeing inside a differential.

What does this looseness mean.. worn parts? Did I open a new can of worms?



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Unread 03-20-2015, 10:08 PM   #2
Anticanman
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It's tough to see because of the reflection on the ring gear but are there chips taken out on the teeth? A little play is ok but it should probably be a little tighter. There is a tolerance spec for the axle and it seems that this one is loose. Could be a pinion bearing going out causing a little lateral deflection or just the rear axle wasn't put together to spec. It's the stock rear axle. Don't expect it to last forever.

Kudos however for not only posting the video but taking the time to ask about things you don't know and also for just doing regular maintenance.
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Unread 03-20-2015, 10:17 PM   #3
chainbreaker
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Quote:
Originally Posted by Anticanman View Post
It's tough to see because of the reflection on the ring gear but are there chips taken out on the teeth? A little play is ok but it should probably be a little tighter. There is a tolerance spec for the axle and it seems that this one is loose. Could be a pinion bearing going out causing a little lateral deflection or just the rear axle wasn't put together to spec. It's the stock rear axle. Don't expect it to last forever.

Kudos however for not only posting the video but taking the time to ask about things you don't know and also for just doing regular maintenance.

I completely agree. It looks a bit loose to me and I thought I saw some metal chips on the ring gear. Take a close look and see if u can tell if they came from the ring or spiders. Do you have any play on your pinion shaft at all? Not rotational but in and out? Might be time for a new set of gears. Or if it were me I would go with a 8.8 from a explorer rather than replace the ring and pinion. Could you post some pics of the ring gear for us to look at? Can't really see much with that reflection on the ring gear.
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Unread 03-21-2015, 07:49 AM   #4
JeeperDon
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You can't just clunk it back and forth and think excessive play. I get about that much driveshaft rotation on a new setup. You have to lock down the pinion gear (driveshaft) and only look at the play between the fixed pinion gear and the moving ring gear. The call is for .005-.008" or so. In general, yours does not look too bad. Your slop might also (and more likely) be drive shaft u-joints.

The best way I found to check u-joints is... Put the Jeep in gear/park, then while laying under, use a foot on a tire to get the Jeep rocking back/forth. Everything will have to tighten/loosen in opposite directions. Feel around the u-joints and pinion for any motion that shouldn't be there.
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Unread 03-21-2015, 01:18 PM   #5
fratis
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Looks ok to me too.
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Unread 03-21-2015, 02:17 PM   #6
timatoe
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Looks fine to me as well. Remember there are "gaps" between all of those different engaging gears it's not a absolute solid connection.
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