Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here XJ (84-01)
All OEM related XJ specific tech. Examples, no start, general maintenance or anything that's stock.

swapping DANA HP30 for a LP30 downgrade?

Thread Tools
 
Search this Thread
 
Old 12-02-2011, 02:02 PM
  #1  
Senior Member
Thread Starter
 
cherokee90's Avatar
 
Join Date: Jun 2010
Location: austin texas
Posts: 524
Likes: 0
Received 0 Likes on 0 Posts
Year: 1998
Model: Cherokee
Engine: 4.0
Default swapping DANA HP30 for a LP30 downgrade?

my comanche got water in the front axle and ruined all the bearings in it, it had a hp dana30 with the vac crap. i went and picked up a dana30 out of a 2000 cherokee is this a serious downgrade cause its a low pinion axle??
Old 12-02-2011, 02:13 PM
  #2  
Junior Member
 
ClassicX's Avatar
 
Join Date: Feb 2011
Location: SoCal
Posts: 79
Likes: 0
Received 0 Likes on 0 Posts
Year: 2001
Model: Cherokee
Engine: 4.0
Default

I have an 01 XJ and HAD to switch to the HP because the angles were so bad. Depends how much lift you have I guess. It was an issue for me for sure.
Old 12-02-2011, 02:33 PM
  #3  
CF Veteran
 
89Laredo's Avatar
 
Join Date: May 2009
Posts: 10,280
Likes: 0
Received 4 Likes on 4 Posts
Year: 1996
Engine: 4.0
Default

If its lifted, yes.
Bad driveline angles, and its easier to get hung up on stuff.
Old 12-02-2011, 02:33 PM
  #4  
Senior Member
Thread Starter
 
cherokee90's Avatar
 
Join Date: Jun 2010
Location: austin texas
Posts: 524
Likes: 0
Received 0 Likes on 0 Posts
Year: 1998
Model: Cherokee
Engine: 4.0
Default

just 4.5 of lift
Old 12-02-2011, 02:34 PM
  #5  
CF Veteran
 
89Laredo's Avatar
 
Join Date: May 2009
Posts: 10,280
Likes: 0
Received 4 Likes on 4 Posts
Year: 1996
Engine: 4.0
Default

get a HP
Old 12-02-2011, 02:36 PM
  #6  
CF Veteran
 
freegdr's Avatar
 
Join Date: Mar 2010
Location: Broward County Fl.
Posts: 47,923
Likes: 0
Received 22 Likes on 22 Posts
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Default

drive shaft might be two short and possible trackbar lengths ,people swapping the other way have had issues
Old 12-02-2011, 02:37 PM
  #7  
Senior Member
Thread Starter
 
cherokee90's Avatar
 
Join Date: Jun 2010
Location: austin texas
Posts: 524
Likes: 0
Received 0 Likes on 0 Posts
Year: 1998
Model: Cherokee
Engine: 4.0
Default

to late lol, ill make it work, i already got a t-case drop. just gonna slap it in there and let it ride if the driveshafts in a bind ill break out the grinder
Old 12-02-2011, 02:58 PM
  #8  
CF Veteran
 
freegdr's Avatar
 
Join Date: Mar 2010
Location: Broward County Fl.
Posts: 47,923
Likes: 0
Received 22 Likes on 22 Posts
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Default

shaft might be to short ...
Old 12-02-2011, 03:00 PM
  #9  
CF Veteran
 
89Laredo's Avatar
 
Join Date: May 2009
Posts: 10,280
Likes: 0
Received 4 Likes on 4 Posts
Year: 1996
Engine: 4.0
Default

Sell it, get a HP...
Theres a reason everyone swaps them out.
Old 12-02-2011, 03:01 PM
  #10  
CF Veteran
 
freegdr's Avatar
 
Join Date: Mar 2010
Location: Broward County Fl.
Posts: 47,923
Likes: 0
Received 22 Likes on 22 Posts
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Default

Originally Posted by 89Laredo
Sell it, get a HP...
Theres a reason everyone swaps them out.
agreed x2
Old 12-02-2011, 03:01 PM
  #11  
CF Veteran
 
TheJerm's Avatar
 
Join Date: Jun 2010
Location: Flint/Asheville
Posts: 2,501
Likes: 0
Received 4 Likes on 4 Posts
Year: 1995
Model: Cherokee
Engine: 4.0 HO
Default

Also, lp front axles are inherently weaker than hp fronts because the was the gears are cut. Lp run on the coast side of the gear or the convex side of the gear, While HP run on the drive side of the gear or the concave side. The concave side of a helical gear is stronger than the convex. But your only running 32's so meh
Old 12-02-2011, 03:20 PM
  #12  
Senior Member
Thread Starter
 
cherokee90's Avatar
 
Join Date: Jun 2010
Location: austin texas
Posts: 524
Likes: 0
Received 0 Likes on 0 Posts
Year: 1998
Model: Cherokee
Engine: 4.0
Default

yeah im not going to run big tires on this jeep(33 max with light wheeling), i have way to many other projects going on. if i ever get around to putting 37 on the manche im going to put some chevy axles under it.
Old 12-02-2011, 03:25 PM
  #13  
CF Veteran
 
SeriousOffroad's Avatar
 
Join Date: Apr 2008
Posts: 13,952
Likes: 0
Received 15 Likes on 13 Posts
Model: Cherokee
Default

Originally Posted by TheJerm
Also, lp front axles are inherently weaker than hp fronts because the was the gears are cut. Lp run on the coast side of the gear or the convex side of the gear, While HP run on the drive side of the gear or the concave side. The concave side of a helical gear is stronger than the convex. But your only running 32's so meh
Incorrect.

Reverse cut gears do not use the Coast side of gear as the Drive side.
The gears are REVERSE CUT so that means the coast side is the coast side, the drive side is the drive side.

Standard on the left, reverse cut on the right.


Originally Posted by cherokee90
yeah im not going to run big tires on this jeep(33 max with light wheeling), i have way to many other projects going on. if i ever get around to putting 37 on the manche im going to put some chevy axles under it.
Chevy front 44's are a passenger side drop. You'll need to change to a passenger-side front output t-case.
Old 12-02-2011, 03:27 PM
  #14  
Senior Member
Thread Starter
 
cherokee90's Avatar
 
Join Date: Jun 2010
Location: austin texas
Posts: 524
Likes: 0
Received 0 Likes on 0 Posts
Year: 1998
Model: Cherokee
Engine: 4.0
Default

standard cut pinion looks way stronger to me, is this true?
Old 12-02-2011, 03:30 PM
  #15  
CF Veteran
 
94cherokeeman's Avatar
 
Join Date: May 2011
Location: Partlow, va
Posts: 3,380
Likes: 0
Received 0 Likes on 0 Posts
Year: 1994
Model: Cherokee
Engine: 4.0 i6, 307 injectors
Default

What is a vac cap on hp30


Quick Reply: swapping DANA HP30 for a LP30 downgrade?



All times are GMT -5. The time now is 07:33 AM.