Jeep Wrangler Forum banner

1 - 19 of 19 Posts

·
Registered
Joined
·
5 Posts
Discussion Starter #1 (Edited by Moderator)
Does anyone know if you can direct swap an XJ front axle into a TJ? my buddy bent the front axle housing in his tj and is wanting to swap an xj axle into it due to the high price of tj axles. excluding changing the gears to match his 4.10 tj gears, would the axle (right down to the brake rotors and everything) be a direct bolt it. i would suspect his tj is a high pinion dana 35 so his xj donor axle would need to be the same.
 

·
Wrecktrician
Joined
·
7,349 Posts
It should bolt right in. The TJ is not an HP diff, the XJ is. Its a better axle than the TJ D30. The rear axle would be the D35.
 

·
Jack Lives Here!!!
Joined
·
7,760 Posts
Dana 35 is a rear axle. And the answer on the rear axle is no it won't bolt right in from an XJ. There is the matter of all of the brackets to deal with.

Now in regards to the front axle.....Yes it will bolt right in. The only difference as Point stated is that a TJ is a low pinion housing and XJ is a High Pinion housing, so the gears will be different if they are being changed. Otherwise it's good to go. It's always good however to look for an XJ housing with no disconnect.
 

·
Registered
Joined
·
5 Posts
Discussion Starter #4
right. my fault. i meant dana 30. if his tj axle is a low pinion and the xj axle is high pinion will his 4.10's swap into the dana 30 high pinion? will the front driveshaft be long enough? i guess he could also go with an 00-01 xj dana 30 front axle which is a low pinion axle as well. sound about right?
 

·
Knows a couple things...
Joined
·
48,969 Posts
High pinion and low pinion gears are cut differently so you can't swap his LP gears into the HP XJ D30. All XJ front Dana 30 axles are high-pinions, all TJ front Dana 30 axles are low pinions. So XJ and TJ D30 ring & pinion gears are totally incompatible with each other. The other parts like axle shafts, knuckles, carriers, diff covers, u-joints, etc. are interchangeable. :)
 

·
Registered
Joined
·
5 Posts
Discussion Starter #6
the info that i dug up said 00-01 xj fronts are low pinion. and, thanks for the advice jerry, i appreciate it. even if its not my jeep. this is what i dug up on the jeep forum sticky thread.
xj front axles
d30 front axle. high pinion 84-99 low pinion 00-01
axle joints 1995-2001 had 297 sized (larger and stronger) u-joints.
 

·
Knows a couple things...
Joined
·
48,969 Posts
I could very well be incorrect on all XJ front Dana 30 axles being high pinion but I sure thought they were. :confused:
 

·
Jack Lives Here!!!
Joined
·
7,760 Posts
I could very well be incorrect on all XJ front Dana 30 axles being high pinion but I sure thought they were. :confused:
He is right Jerry. The 00 and 01 model XJ's were Low Pinion housings.
 

·
Registered
Joined
·
5 Posts
Discussion Starter #10
so i found a low pinion in a 2000 xj for $250 locally at a junkyard. will that directly swap into my buddies 98 tj? i'm talking brakes/line and all. just plain bolting the entire setup into his tj (and swapping his 4.10 tj gears into it).
 

·
Administrator
Joined
·
12,548 Posts
Here is some more infor:


Look for XJ's that had the 4 banger they will have 4.10's in there.. so no swap needed.

Look for a 93 and newer XJ axle they don't have the center axle disconect.. The cut off for the HP was 1999, though you may find a few 2000's out there.

The rear axle fwiw right around 1997 changed for some models to the Chrysler 8.25 with 29 splines vs the dana 35. this is good for 33's with a locker. ALso its better than some early examples which came with 27 splines. Down side, spring over setup, and limited lockers to pick from.

In additon, you may need to mod your front drive shaft if you go with a HP XJ axle
 

·
Registered
Joined
·
61 Posts
I swapped a '96 XJ axle into my '97 TJ easy..

Even found the matching gear ratio for my '97, 3.55.

I ran this setup for a couple of months until I got my Rubi44 completed. I then swapped in a re-geared XJ HPD30 (with matching 4.10) and the Rubi44.

I didn't have to change the front driveshaft at all, as a matter of fact, after lifting the Jeep AND swapping to a HPD30, I have about the same driveshaft angle as pre-lift, and thus, the slip-yoke is almost the same as stock.

Supposedly, the reverse rotation D30 realizes a stronger gear set... I'm not sure about this, but sounds possible.
 

·
Jack Lives Here!!!
Joined
·
7,760 Posts
so i found a low pinion in a 2000 xj for $250 locally at a junkyard. will that directly swap into my buddies 98 tj? i'm talking brakes/line and all. just plain bolting the entire setup into his tj (and swapping his 4.10 tj gears into it).
Yes it will all bolt in. However it's just not that simple bolting in the ring gear. Yes you can do it first to run a pattern on it for pinion depth, but you also need to check backlash as well. Odds are with a D30 it's not going to match up an acceptable pattern right off the bat. Then you'll have to take the bearings off and play with the shims to get everything right.

Supposedly, the reverse rotation D30 realizes a stronger gear set... I'm not sure about this, but sounds possible.
The reason that it's stronger for the front axle is because the pinion is running on the coast side of the ring gear during forward motion. Just looking at a basic ring gear says that the coast side is stronger than the drive side.
 

·
Registered
Joined
·
29 Posts
Dana 35 is a rear axle. And the answer on the rear axle is no it won't bolt right in from an XJ. There is the matter of all of the brackets to deal with.

Now in regards to the front axle.....Yes it will bolt right in. The only difference as Point stated is that a TJ is a low pinion housing and XJ is a High Pinion housing, so the gears will be different if they are being changed. Otherwise it's good to go. It's always good however to look for an XJ housing with no disconnect.
How do you determine if it is a "housing with no disconnect" vs one without?
 

·
Knows a couple things...
Joined
·
48,969 Posts
How do you determine if it is a "housing with no disconnect" vs one without?
The older XJ front Dana 30 axle with the central axle disconnect (aka CAD) has a housing around the passenger side axle tube which is what holds the disconnect system which disconnects the passenger side when in 2wd. It's no longer necessary to do that with newer tcase designs.

But an XJ Dana 30 axle with that disconnect is just as good to use, you can eliminate the disconnect function by simply replacing that side's axle shaft with a standard passenger-side Dana 30 axle shaft. They make cover plates for the disconnect system if you remove it. The axle tube is just as strong if not even a little stiffer with the disconnect housing on it.
 

Attachments

·
Registered
Joined
·
61 Posts
I did this swap. Completely bolt-on.
 

·
Registered
Joined
·
1 Posts
I did this swap. Completely bolt-on.
Front swap only or both ends? I'm looking to find D44 front and rears or if an XJ and swap them into a TJ. Just wondering how much work it's going to be and should I just go with Waggy stuff.

Sent from my SM-N960U1 using Tapatalk
 

·
Super Moderator
Joined
·
6,608 Posts
im assuming front only as the rear is leaf sprung which will require cutting and welding new brackets on and usually a similar axle to the d35.


there are pros and cons to every axle and finding the right combo depends on your needs.

one of our jeeps has the d30/35 combo and running 33's. when the tires wear down a bit I'm planning on doing a S35 upgrade to the rear and regear both axles. havent decided if its worth doing a HPD30 or just leaving the LPD30 in it. if I can find a decent one for $100 or so I'll probably swap it out but the strength difference is negligible, just gets the DS a few inches higher at the axle.

leaving it as is and upgrading the rear to a S35 will be roughly the same strength as the Rubi 44's in mine with more clearance. only downside is the gear ratio is limited to 5.13.

the waggy stuff has its own list of drawbacks and requires extensive modifications. the real question is do you want to run larger than 35" tires and do you want deeper than 5.13 gears?
 
1 - 19 of 19 Posts
Top