NAXJA Forums -::- North American XJ Association  

Go Back   NAXJA Forums -::- North American XJ Association > NAXJA Unibody Jeep Technical Forums > Jeep Cherokee XJ (1984 - 2001) > Modified Tech Discussion
HOME Member FAQ Sponsor Info Rules Bylaws E-Mail

Modified Tech Discussion Forum for Tech related discussion for Modified XJ's and MJ's.

Reply
 
Thread Tools Display Modes
  #1  
Old May 24th, 2011, 10:22
Non-StopXJ's Avatar
Non-StopXJ Non-StopXJ is offline
NAXJA Forum User
 
Join Date: May 2011
Location: Kansas
Posts: 38
Seeking Info on Dynatrac Pro-Rock 44 Axles

Just a quick thank you for all on this forum. Even though this is my first post...I have come to the Forum to answer questions/get ideas for over 2 years.


It's time to upgrade the stock axles (D35 rear/D30front) on my 1998 Cherokee Classic (4.0L / AW4 / 242J ) and I don't want to waste money/time building up the weak stock axles. I would really like to put D44's on both front and rear.

I'm considering just taking the easy way out, but shelling out more $$ to slap some ready to bolt-on Dynatrac Pro-Rock 44 Front/Rear axles that come with everything I need.

http://www.dynatrac.com/products_jeep.html

I guess I'm just really looking for an opinion from someone who has dealt with Dynatrac assemblies for their XJ before I pull the trigger on something this major. Is there a cheaper option for both D44's front & rear off a Junkyard TJ/YJ that wouldn't require mount modifications to fit?

My 98XJ has a 3' BDS Lift, 31' BFG AT KO's, Hanson Off-Road Front/Rear Bumpers, TNT Customs Belly Pan, Tom Woods SYE & Custom CV Front/Rear Drive shafts.

Last edited by Non-StopXJ; May 24th, 2011 at 10:28. Reason: Adding spec info
Reply With Quote
  #2  
Old May 24th, 2011, 10:41
RoyalXJ's Avatar
RoyalXJ RoyalXJ is offline
NAXJA Member
 
Join Date: Jul 2009
Location: West Deptford, NJ
Posts: 3,634
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

Way over priced. Its not hard to find jy axles and build them.
__________________
Project- #14 97 3.5" LA, Built 30/8.25, 35" MTR Kevlars.
Reply With Quote
  #3  
Old May 24th, 2011, 10:42
RoyalXJ's Avatar
RoyalXJ RoyalXJ is offline
NAXJA Member
 
Join Date: Jul 2009
Location: West Deptford, NJ
Posts: 3,634
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

Why do you need 44s with a 31" tire?
__________________
Project- #14 97 3.5" LA, Built 30/8.25, 35" MTR Kevlars.
Reply With Quote
  #4  
Old May 24th, 2011, 11:20
dart70LA's Avatar
dart70LA dart70LA is offline
NAXJA Forum User
 
Join Date: Jul 2008
Location: Santee, CA
Posts: 96
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

The Dynatrac 44 front axle looks like a Low Pinion assembly. If so, it would not be much of an improvement over your current axle(HP30).(all of the D60's they show on their web page specifically state Hi-Pinion, but the D44 says nothing about it)

For the rear, a Chrysler 8.25 from a 96 or newer will have 29 splines and handle 33" tires easily. You can pick them up for $150-200 at a JY.

Regear them for less than $1000 total and you just saved $3-4 grand. Add lockers and you still are saving 2-3 grand.

If you plan on 35's or bigger in the future, 2 Dana 44's may not be enough to keep you feeling warm and fuzzy for long.
Reply With Quote
  #5  
Old May 24th, 2011, 11:22
RoyalXJ's Avatar
RoyalXJ RoyalXJ is offline
NAXJA Member
 
Join Date: Jul 2009
Location: West Deptford, NJ
Posts: 3,634
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

44s are plenty for 35s
__________________
Project- #14 97 3.5" LA, Built 30/8.25, 35" MTR Kevlars.
Reply With Quote
  #6  
Old May 24th, 2011, 11:50
jonzer12 jonzer12 is offline
NAXJA Forum User
 
Join Date: Dec 2006
Location: Canada
Posts: 387
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

Front Pro Rock 44's are high pinion and use JK ring and pinions. A significant upgrade over an old school 44. The housings offer better clearance and are much more stout than any stock axle and you finally get to move past the old x760 ujoint.
The rears are 33 spline I believe.


If you are handy you might consider just buying the housing and working from there. Could probably save some money if you are resourcefull.
They would be a sweet setup. With chromolly shafts and ujoints they would probably be good to 37-38" tires.
Reply With Quote
  #7  
Old May 24th, 2011, 12:49
XJFrankenstein's Avatar
XJFrankenstein XJFrankenstein is offline
NAXJA Forum User
 
Join Date: Apr 2011
Location: Virginia
Posts: 59
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

If you want to save a little coin, you could put the Pro-Rock 44 in the front and a Ford Explorer 8.8 in the rear (31 spline, cro-moly shafts available from Superior - Super 88 kit). This is good 3/4 ton combo.
Reply With Quote
  #8  
Old May 24th, 2011, 12:52
RoyalXJ's Avatar
RoyalXJ RoyalXJ is offline
NAXJA Member
 
Join Date: Jul 2009
Location: West Deptford, NJ
Posts: 3,634
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

Ok but does anyone know what size tires he plans on running? 33 and under there's no reason to spend that kinda money on those axles
__________________
Project- #14 97 3.5" LA, Built 30/8.25, 35" MTR Kevlars.
Reply With Quote
  #9  
Old May 24th, 2011, 14:25
Non-StopXJ's Avatar
Non-StopXJ Non-StopXJ is offline
NAXJA Forum User
 
Join Date: May 2011
Location: Kansas
Posts: 38
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

Thanks for responses all.

Quote:
Originally Posted by RoyalXJ View Post
Ok but does anyone know what size tires he plans on running? 33 and under there's no reason to spend that kinda money on those axles
I plan to stick around 32 now and then go for 35's down the road after I pull the trigger and make my XJ a full-time trail rig. Right now it's doing double time as my daily driver/weekend wheeler.
Reply With Quote
  #10  
Old May 24th, 2011, 14:45
robsjeepxj robsjeepxj is offline
NAXJA Forum User
 
Join Date: Feb 2008
Location: North Jersey
Posts: 799
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

Quote:
Originally Posted by XJFrankenstein View Post
If you want to save a little coin, you could put the Pro-Rock 44 in the front and a Ford Explorer 8.8 in the rear (31 spline, cro-moly shafts available from Superior - Super 88 kit). This is good 3/4 ton combo.
X2 on this. This would be a great setup for 35's, the 8.8 is a great axle, stronger than a stock 44 any day and you could save some cash for other things.
Reply With Quote
  #11  
Old May 24th, 2011, 14:51
beakie's Avatar
beakie beakie is offline
NAXJA Forum User
 
Join Date: May 2006
Location: Ontario, Canada
Posts: 2,384
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

if your "eventual" plans are to turn it into a trail rig... are you ABSOLUTELY sure 35's are the max tire size?

if so, I can see the Pro-Rock D44 front, and then build a Ford 8.8 as a cheaper but as strong alternative to Pro-Rock rear.

if 35's are a stepping stone to something bigger, then I would think you could end up spending the money on D60's years down the road.

something to think about... otherwise the Pro-Rock front 44 is a nice axle, very stout for a D44 (as stated about bigger components then stock D44)... but for a rear I think you could spend the money in better places, or just spend less for equal strength.
Reply With Quote
  #12  
Old May 24th, 2011, 22:35
whitexj98 whitexj98 is offline
NAXJA Forum User
 
Join Date: Feb 2007
Location: Fraser, MI
Posts: 2,142
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

Does anyone have any idea what their front 44 goes for?
Reply With Quote
  #13  
Old May 24th, 2011, 22:46
Darky's Avatar
Darky Darky is offline
NAXJA Forum User
 
Join Date: Apr 2004
Location: 29 Palms, CA
Posts: 13,336
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

Quote:
Originally Posted by whitexj98 View Post
Does anyone have any idea what their front 44 goes for?
A kidney? I don't know but they're expensive...

Some XJs came with D44s. Find one and it'll swap in with no mods. Your D30 can be built to withstand 35s. Or you can find an HP44 from an older Ford truck and build it. You can take it to a shop to have them do the mounts if needed. A TJ Rubicon 44 will bolt in, but it's low pinion and runs D30 outers.
Reply With Quote
  #14  
Old May 24th, 2011, 22:54
whitexj98 whitexj98 is offline
NAXJA Forum User
 
Join Date: Feb 2007
Location: Fraser, MI
Posts: 2,142
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

Yeah I have been watching for a front 44 out of a ford for about 3 months now, your still in quite a bit building one and really not much differnt price wise then a 30 considering they will be getting pretty much the same things.
Reply With Quote
  #15  
Old May 25th, 2011, 00:04
Darky's Avatar
Darky Darky is offline
NAXJA Forum User
 
Join Date: Apr 2004
Location: 29 Palms, CA
Posts: 13,336
Re: Seeking Info on Dynatrac Pro-Rock 44 Axles

A Ford HP44 will be stronger than the 30 and can be built to be way stronger, plus the bigger brakes and manual hubs. It will cost more than building the 30, but will be considerably stronger.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
looking for info on rock krawler lifts nickjc13 South East Chapter 8 July 6th, 2006 21:33
T-Rock axles lost1 Modified Tech Discussion 12 July 5th, 2006 13:54
Currie and dynatrac axles? good, bad, over rated? 2000Cherokee Modified Tech Discussion 4 April 24th, 2006 09:17
Offset rear axles info ChristmasXJ Modified Tech Discussion 3 December 15th, 2005 18:11


All times are GMT -7. The time now is 08:28.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
NAXJA and NAXJA logo's Copyright NAXJA. All content/images Copyright NAXJA 1999-2014