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2wd vs 4wd rear end difference?

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  #1  
Old 04-24-2012, 11:19 AM
fj5gtx fj5gtx is offline
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Default 2wd vs 4wd rear end difference?

2004 Dodge Ram 1500 4x4 QC

Local junkyards are telling me that there is a difference between a 4wd and a 2wd rear end (the rear one of course). They don't know what it is, but the "numbers are different".

Is anyone aware of what the difference is? That shortens my list of donors!

Thanks,
Paul
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Last edited by fj5gtx; 04-24-2012 at 11:23 AM.. Reason: more info!
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Old 04-27-2012, 04:43 PM
63T-Bolt 63T-Bolt is offline
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No difference in them at all, both are 9.25 with the same brakes, 4x4 might have LSD and the 2wd might not.


I have a 9.25 from one that was totaled out, been trying to sell it..... Might be cheaper than the salvage is wanting....
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Old 04-27-2012, 04:50 PM
fj5gtx fj5gtx is offline
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Dealers have different part numbers between 2wd and 4wd on the empty housing. My LSD clips broke and ground into the bearing support, so I need a good housing.

Must be something different between 2 wd and 4 wd. I can't imagine why it'd be different, but they are somehow different. I'm leery of buying a 2wd version for my 4x4 truck until I know what is different.

Regards,
Paul
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Old 04-27-2012, 04:57 PM
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No difference as far as fitment goes when your a 2wd installing a 4wd rearend. I dont think it has anything to do with Open or LSD equip either.

The 4wd has bump stops and the 2wd does not. This means you could install a 4wd on a 2wd but not the otherway around unless you fabricated up the bump stops. 2wd's dont need bump stops.
I'd imagine the "tiedowns" for the brake lines might be in a slightly different place, but who cares. Throw a couple of zipties or metal band wraps to hold them securely in place IF thats the case.
I found THIS and it actually looks like the brake lines spot is the same.
I really think the bump stops are the only difference. Maybe cut them off yours and weld them on the new one???
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Old 04-27-2012, 05:16 PM
fj5gtx fj5gtx is offline
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Quote:
Originally Posted by dirtydog View Post
No difference as far as fitment goes when your a 2wd installing a 4wd rearend. I dont think it has anything to do with Open or LSD equip either.

The 4wd has bump stops and the 2wd does not. This means you could install a 4wd on a 2wd but not the otherway around unless you fabricated up the bump stops. 2wd's dont need bump stops.
I'd imagine the "tiedowns" for the brake lines might be in a slightly different place, but who cares. Throw a couple of zipties or metal band wraps to hold them securely in place IF thats the case.
I found THIS and it actually looks like the brake lines spot is the same.
I really think the bump stops are the only difference. Maybe cut them off yours and weld them on the new one???
That link didn't work for me. I hope you're right... anyone have detailed pics of a 2wd housing?

Thanks,
Paul

Paul
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Old 04-27-2012, 07:25 PM
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www.*********.com/forums/showthread.php?t=265859


dodge talk is starred out (one word)
thats where I took the pics from

Lets try this evasive manuvere that DF cant block/restrict. Click on the first link and scroll to the last post. That is the link I used. http://search.yahoo.com/search;_ylt=...m=EGMB&rd=pref
btw, the 4th one down on the list is the actual thread linked directly into DT. It's 2 pages and on the 2nd page is that link.

4x4 rear end 1st pic


2x4 rear end 2nd pic
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Last edited by dirtydog; 05-25-2012 at 06:28 PM..
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Old 04-30-2012, 10:49 PM
TrueDogman TrueDogman is offline
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Presently in the process of putting a 2wd rear end into a 4wd truck. Yes, bump stops are missing for the 2 wheeler. However, I have air bags....which eliminate the requirement for bump stops.

If you have any questions, shoot me a PM.
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Old 05-01-2012, 03:21 PM
fj5gtx fj5gtx is offline
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Default bumpstops are over rated :-)

I looked at my bumpstops, doesn't look like the rubber ever came into contact with them. I don't 4 wheel this truck (at least not yet). Also thinking they're not really doing much, they don't sit much higher than the axle tube. I suppose if it came down really hard *maybe* it'd dimple the tube, but I'm thinking those brackets might be over kill. Either way, if I wanted to add some they'd be an easy fab. Not much point of sawing off the originals.
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Old 05-01-2012, 03:23 PM
fj5gtx fj5gtx is offline
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Default pinion angle?

Quote:
Originally Posted by TrueDogman View Post
Presently in the process of putting a 2wd rear end into a 4wd truck. Yes, bump stops are missing for the 2 wheeler. However, I have air bags....which eliminate the requirement for bump stops.

If you have any questions, shoot me a PM.
Wondering if the spring brackets might be at a different angle, if the 2wd is lower than the 4wd they might do that to optimize and keep the joints as straight as possible.
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Old 05-01-2012, 08:31 PM
TrueDogman TrueDogman is offline
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Heres another pic for everyone.

Both 03 quads. Black one is 2 wheel drive. Housings look the same to me...except for the bump stops. Diffs are sitting a little different on the floor...due to the brake rotors on the black one.

Click the image to open in full size.

Last edited by TrueDogman; 05-01-2012 at 08:34 PM..
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Old 05-01-2012, 08:31 PM
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