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Unread 08-01-2014, 09:37 AM   #1
Cjrichins
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8.25 Swap?

I just swapped a built 400 SBC into my XJ. Is the 8.25 going to hang in there for the foreseeable future? I can find all the specs I want online, but I am looking for personal experience. Thanks Jeepers!

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Unread 08-01-2014, 05:49 PM   #2
jeepjunkie97
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383 stroked? And this question is interesting because once we move we won't have emission testing so I can put in a sbc as well
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Unread 08-02-2014, 09:57 AM   #3
Cjrichins
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Its the 400 small block, it came out in the 70s but its a great tourqey motor!
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Unread 08-02-2014, 10:14 AM   #4
jeepjunkie97
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Quote:
Originally Posted by Cjrichins
Its the 400 small block, it came out in the 70s but its a great tourqey motor!
Sounds like my kinda build!! Could you post pics of the engine bay? And I guess if you're questioning its strength have a junkyard Dana 44 on deck I guess? Don't know a whole lot about axle durability yet
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Unread 08-02-2014, 10:01 PM   #5
Muddy97Cherokee
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Depends on how much you put it through. The 8.25 is strong but it does have a limit. I would keep it in until it does crap out. But till then I would prepare and get another axle to swap in. Maybe a 9" or 10.25/10.5.
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Unread 08-03-2014, 08:00 AM   #6
JeepN4KC
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Everything I've read puts the 8.25 (29 spline) just slightly under the D44 - I'd say you're good. You can break anything but the 8.25 is a strong axle.
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Unread 08-06-2014, 10:46 AM   #7
bluejunior
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What's your use case? More power but stock gearing/tires? Street, offroad or mix?
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Unread 08-06-2014, 05:30 PM   #8
Alcancia
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Is it the 27 or 29 spline axle?

If it's the 29, I'd say you're good for a while. Mine took all the abuse in the world until I messed it up by installing a new pinion yoke and not getting the bearing pre-load right.

I'd just swap in the Ford 8.8" anyway. It's a wicked strong axle and is a super easy swap on the XJ.
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Unread 08-07-2014, 09:35 AM   #9
premo
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It'll be fine. They put it under 3/4 ton vans with 360s. Hell, I own one. It's a stout axle
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Unread 08-07-2014, 09:48 AM   #10
bluejunior
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Quote:
Originally Posted by premo View Post
It'll be fine. They put it under 3/4 ton vans with 360s. Hell, I own one. It's a stout axle
Street use I couldn't agree more. Particularly if you've got the 29 spline, but I doubt the 27 would have any problems. If you're running big tires and off-roading, go with the "run it till it breaks and replace with an 8.8" response.
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Unread 08-07-2014, 10:11 AM   #11
premo
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I had a 27 spline for the longest time with 36" bias swampers with beadlocks. Ask anyone that knows me and they'll tell you I never wheel light. Never had an issue. Don't drive like an a-hole and it'll be fine.
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Unread 08-08-2014, 11:15 AM   #12
Cjrichins
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Here she is...I really shoulda posted build pics but, fabrication skills are limited so I try to keep myself from a flaming .
SBC 400 / 700r4
Long arm Rough Country 6" and 33's.
I can post more pictures is one so desires.



Its a really fun rig that I use for "dual-sport". But now with the new motor I am desperately trying to pass emissions haha
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Unread 08-08-2014, 11:21 AM   #13
Cjrichins
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Thanks for everyone's responses btw!
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Unread 08-08-2014, 05:11 PM   #14
premo
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Very cool! Thanks for sharing
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