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What to do? 10 bolt with 4.10s?

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Old Apr 16, 2015 | 08:42 AM
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Default What to do? 10 bolt with 4.10s?

Ok so I'm in a bit of a tight spot here.

I want to drive my WS6 for the summer after much neglect only driving it a few times over the past few years so it doesn't sit for too long. The only issue is I snapped a rear wheel stud sometime last year, replaced that side with ARP's, but now I have a rear vibration that's most notably felt at 60+

My best guess is that the axle bearing is messed up, but I cant be sure. I'd rather not tear into my 10 bolt and not even have anything better to show for it; of course I want a 12 or 9 but that's just not in the budget for now.

I found a guy locally that has an SLP 10 bolt with 4.10s that he braced, welded the tubes and has a gear driven Posi. He wants $500 or $250 + trade for a factory rear.

I'd much rather put something in that's an upgrade to my stock 3.42 10 bolt; I'm only weary of 4.10s because it would be my daily driver for the summer and I'd be doing mostly highway driving; would the gearing be a bit much?


So to sum things up, would a 4.10 rear be unreasonable for a DD? Should I bother with swapping in a new rear or try and figure out whats wrong with my stock rear? My guess is an axle bearing, but should I even bother? How difficult are they to replace?

Any input is really appreciated!
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Old Apr 16, 2015 | 09:52 AM
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An axle bearing is normally easy to replace. A slide hammer with outter facing claws that can be rented at an auto parts store is the easiest way of removing it. If they go bad then you normally need an axle also.
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Old Apr 16, 2015 | 01:49 PM
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Originally Posted by TempleU_WS6
Ok so I'm in a bit of a tight spot here.

I want to drive my WS6 for the summer after much neglect only driving it a few times over the past few years so it doesn't sit for too long. The only issue is I snapped a rear wheel stud sometime last year, replaced that side with ARP's, but now I have a rear vibration that's most notably felt at 60+

My best guess is that the axle bearing is messed up, but I cant be sure. I'd rather not tear into my 10 bolt and not even have anything better to show for it; of course I want a 12 or 9 but that's just not in the budget for now.

I found a guy locally that has an SLP 10 bolt with 4.10s that he braced, welded the tubes and has a gear driven Posi. He wants $500 or $250 + trade for a factory rear.

I'd much rather put something in that's an upgrade to my stock 3.42 10 bolt; I'm only weary of 4.10s because it would be my daily driver for the summer and I'd be doing mostly highway driving; would the gearing be a bit much?


So to sum things up, would a 4.10 rear be unreasonable for a DD? Should I bother with swapping in a new rear or try and figure out whats wrong with my stock rear? My guess is an axle bearing, but should I even bother? How difficult are they to replace?

Any input is really appreciated!
With an A4? Probably would be a bit much and negatively impact your mpgs. With an M6? 4.10s would work just fine for a daily and not hammer your mpgs too bad.
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Old Apr 16, 2015 | 04:31 PM
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Honestly, 4.10 does not leave a lot of material on the ring gear. I would not suggest going over 3.73 without risking durability of Barbie 10-bolt
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Old Apr 17, 2015 | 07:46 AM
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Originally Posted by JRENIGAR
An axle bearing is normally easy to replace. A slide hammer with outter facing claws that can be rented at an auto parts store is the easiest way of removing it. If they go bad then you normally need an axle also.
Yeah, thats what I though. I dont even think its worth potentially getting into that situation.

Originally Posted by blackandgold
With an A4? Probably would be a bit much and negatively impact your mpgs. With an M6? 4.10s would work just fine for a daily and not hammer your mpgs too bad.
I have an M6, but I had a feeling like Darth points out, 3.73's might be a better bet, which I was leaning towards anyway.

Originally Posted by Darth_V8r
Honestly, 4.10 does not leave a lot of material on the ring gear. I would not suggest going over 3.73 without risking durability of Barbie 10-bolt
So hmm, maybe I'll just source another stock 3.42 3 channel 10 bolt until I can get a 12 or 9 under it?

What are they going for these days?
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Old Apr 17, 2015 | 11:08 AM
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I would just find another 3.42 carrier or even a 3.23 from an A4, whatever is most cost effective and run it. Put your spare change in a jar to save up for a 9 inch or such. It's worth the piece of mind. I went from 3.23 to 3.73 with my S60 and the MPH isn't off by a noticeable amount which surprised me. I don't know that acceleration has changed much one way or the other. Seems the same overall.
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