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Unread 06-23-2013, 10:11 AM   #1
ikidd
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98 XJ Dana 30 in a 94 ZJ?

I've read that the XJ Dana 30s were reverse cut / reverse rotation while the ZJ were not. But when I look at replacement ring gear/pinion sets, they show as compatible which I can't imagine would be the case if they were different rotation.

Am I able to swap an XJ Dana 30 in to my ZJ while I rebuild the old 30? I might have to swap over the driveshaft as I think my old one is the long pinion version.

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Unread 06-23-2013, 10:14 AM   #2
WhiteOut
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The HP D30 axles were reverse cut gears. Yes, you will be able to put the XJ axle in while your other one is being worked on, it will be a direct swap.

PS: Thank you for sending the extra police and the military, much appreciated.
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Unread 06-23-2013, 10:19 AM   #3
ikidd
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Thanks, Whiteout.

Not sure what you mean by the police, though.
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Unread 06-23-2013, 10:43 AM   #4
riot1987
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That xj D30 will swap. Make sure your gears match
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Unread 06-23-2013, 11:04 AM   #5
Timo_90xj
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Also keep in mind the HP D30 gears are roughly 30% stronger than maching ratio gearset on a LP D30 - when going forward that is.
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Unread 06-23-2013, 11:09 AM   #6
WhiteOut
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Quote:
Originally Posted by ikidd View Post
Thanks, Whiteout.

Not sure what you mean by the police, though.
I'm in Calgary. EPS sent about 300 officers and vehicles, the military sent 1200+ and tons of equipment.
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Unread 06-23-2013, 11:12 AM   #7
riot1987
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Quote:
Originally Posted by Timo_90xj View Post
Also keep in mind the HP D30 gears are roughly 30% stronger than maching ratio gearset on a LP D30 - when going forward that is.
What about reverse?
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Unread 06-23-2013, 11:39 AM   #8
ikidd
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Quote:
Originally Posted by WhiteOut View Post
I'm in Calgary. EPS sent about 300 officers and vehicles, the military sent 1200+ and tons of equipment.
Apparently we didn't send enough, I got pulled over and ticketed for not having my 13 registration sticker on my plate today.
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Unread 06-23-2013, 02:24 PM   #9
Timo_90xj
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Quote:
Originally Posted by riot1987 View Post
What about reverse?
LP is about that same 30% steonger in reverse compared to the HP in reverse. In other words, HP front axle R&P is most likely destroyed when doing silly stuff in reverse..
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http://www.jeepforum.com/forum/f13/d...s-etc-1222317/


1990 XJ Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***

***Under construction***
1990 XJ (4-door), 4.0 I6, AW4, NP242, PBR 42" tires, Unimog 404 portal axles, 110" WB, full cage + uniframe completely rebuilt, front 3-link + panhard / double triangulated 4-link rear,... ***SOLD***
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Unread 06-23-2013, 04:24 PM   #10
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Quote:
Originally Posted by riot1987 View Post
What about reverse?
on a typical LP front axle, you are actually on the "coast" side of the gears under power which is the weaker side. HP you are on the drive side, so in forward you are on the proper side of the gears.
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Unread 06-23-2013, 05:48 PM   #11
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Seems we went from a question about finding reverse cut gears to folks expounding on the virtues of an hp30
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Unread 06-23-2013, 08:24 PM   #12
riot1987
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Originally Posted by dusterdude View Post
Seems we went from a question about finding reverse cut gears to folks expounding on the virtues of an hp30
The op was answered wasn't it?
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Unread 06-24-2013, 06:42 PM   #13
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I dont think so
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Unread 06-24-2013, 07:05 PM   #14
ikidd
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Quote:
Originally Posted by dusterdude View Post
I dont think so
I'm OP and I approve the original responses. They answered my question, and apparently the XJ axle is stronger than my ZJ original. Might stick with it.
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Unread 06-24-2013, 07:10 PM   #15
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