ZJ HP30 build ?'s - Page 3 - JeepForum.com
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post #31 of 41 Old 05-13-2013, 02:09 PM
Mark-318-IT
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1998 ZJ 
 
Join Date: Sep 2011
Location: Desenzano del Garda (BS)
Posts: 288
hi, how is this 30HP going?

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post #32 of 41 Old 05-13-2013, 07:17 PM
spidermonkey
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1998 ZJ 
 
Join Date: Sep 2008
Location: Two Harbors MN
Posts: 665
I rebuilt my 89XJ axle for my 98 ZJ. I made my own disco block off plate out of some 1/8" steal. As for the seal, I just ordered one from Iron Rock, I also did new G2 gears and master install kit with new pinion and carrier bearings. I then used my ZJ knuckles, brakes, and shafts.

98ZJ, 4.0,242, 8.8 Detroit, hp30, 3.5" lift, IRO LA's 4.56's, 33" Firestone MT's, custom rear bumper, ARB front, Engo E9000, factory skids

My driveway build here: http://www.jeepforum.com/forum/f197/spidermonkey-s-98-zj-build-716209/
speedo reading x spd gear tooth count/gps speed = new spd gear for dead on accuracy
North Shore Wheelers www.nsw4x4.com
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post #33 of 41 Old 05-13-2013, 07:47 PM Thread Starter
riot1987
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1997 ZJ 
 
Join Date: Jun 2012
Posts: 5,036
Quote:
Originally Posted by Mark-318-IT View Post
hi, how is this 30HP going?
Its slow, Im still getting parts. But its getting there. Ill post some pics soon.

http://www.jeepforum.com/forum/f22/riots-97-grand-1436100/

Build thread^^
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post #34 of 41 Old 05-13-2013, 09:55 PM
bigb229
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1998 ZJ 
 
Join Date: Feb 2010
Location: ga
Posts: 697
http://www.jeepforum.com/forum/f11/w...-list-1216365/

There are several threads on this. This is the first one that popped up.
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post #35 of 41 Old 05-19-2013, 05:59 AM
Mark-318-IT
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1998 ZJ 
 
Join Date: Sep 2011
Location: Desenzano del Garda (BS)
Posts: 288
hi, i have a question: what really are the differences between a dana30 and a 30HP?
i'm asking because i tryed to look for this on the web but i found a lot of different answers:
-a guy was saying that the only difference was that in the HP the front drive shaft works with a better angle (so there are less vibes);
-someone was saying that the 30HP has more ground clearence;
-another one was talking about Cs.

so i'm pretty confused

someone more skilled can help me?

because i'd like to do this swap, but i'm trying to understand if this worth the job...

thanks guys
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post #36 of 41 Old 05-21-2013, 07:16 AM
spidermonkey
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1998 ZJ 
 
Join Date: Sep 2008
Location: Two Harbors MN
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The pinion is about 20% stronger, as are the reverse cut gears in a front axle application. The biggest win for me is that the driveshaft is almost 4" higher. A big benefit for offroad clearance. If you have a good working low pinion and don't plan on gears, it should be fine. I was doing the gears and already had the HP axle so it was a no brainer.

98ZJ, 4.0,242, 8.8 Detroit, hp30, 3.5" lift, IRO LA's 4.56's, 33" Firestone MT's, custom rear bumper, ARB front, Engo E9000, factory skids

My driveway build here: http://www.jeepforum.com/forum/showthread.php?t=716209
speedo reading x spd gear tooth count/gps speed = new spd gear for dead on accuracy
North Shore Wheelers www.nsw4x4.com
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post #37 of 41 Old 05-21-2013, 07:23 AM Thread Starter
riot1987
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1997 ZJ 
 
Join Date: Jun 2012
Posts: 5,036
Thats kinda how I got mine. It was doing nothing in the back yard so I got on that. I havent heard about the C's being different. Hp's are stronger, better clearance, less DS angle. It was worth it for me

http://www.jeepforum.com/forum/f22/riots-97-grand-1436100/

Build thread^^
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post #38 of 41 Old 05-21-2013, 09:41 PM
farmerjohnson
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1985 FSJ Wagoneer 
 
Join Date: Jul 2011
Location: Palmdale
Posts: 83
Here is what I did when I swapped to WJ knuckles. http://www.farmerjohnsonoffroad.com/...Conversion.php
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post #39 of 41 Old 05-24-2013, 09:58 AM
Mark-318-IT
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1998 ZJ 
 
Join Date: Sep 2011
Location: Desenzano del Garda (BS)
Posts: 288
understood, thanks and is it true that XJ 30HP is a design with reverse rotation, the ZJ 30LP is a design with the hypoid gears rotating in the normal direction, so the hp is stronger? is this that spydermonky were you saying?
thanks, sry for all my questions...
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post #40 of 41 Old 05-24-2013, 12:42 PM
spidermonkey
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1998 ZJ 
 
Join Date: Sep 2008
Location: Two Harbors MN
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Quote:
Originally Posted by Mark-318-IT View Post
understood, thanks and is it true that XJ 30HP is a design with reverse rotation, the ZJ 30LP is a design with the hypoid gears rotating in the normal direction, so the hp is stronger? is this that spydermonky were you saying?
thanks, sry for all my questions...
Yup

98ZJ, 4.0,242, 8.8 Detroit, hp30, 3.5" lift, IRO LA's 4.56's, 33" Firestone MT's, custom rear bumper, ARB front, Engo E9000, factory skids

My driveway build here: http://www.jeepforum.com/forum/showthread.php?t=716209
speedo reading x spd gear tooth count/gps speed = new spd gear for dead on accuracy
North Shore Wheelers www.nsw4x4.com
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post #41 of 41 Old 05-24-2013, 05:08 PM
Mark-318-IT
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1998 ZJ 
 
Join Date: Sep 2011
Location: Desenzano del Garda (BS)
Posts: 288
thanks
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