Thank you I think it is for a d30

 

I'm an axle builder so I'll shed some light here.

There is no "carrier break" on the 8.25

The 8.25 came in 27 spine(91-some 96's) 29 spline(some 96's-01)

The carrier/side gears and of course the shafts are different between the 8.25 27v.29

The D-30 has a carrier break at 3.73, anything above that has to have the 3.73+ carrier, anything below 3.73 has to have the stock carrier.
All 00/01 XJ's have the undesirable and weaker low pinion D-30 but you do have the stronger axle shafts.

91-99 have the stronger high pinion and in 96 you get the stronger axle shafts/U-joints unless you have ABS then you still get the stronger shafts.

84-90 got the CAD high pinion D-30 with weaker U-joints unless you had a later 90 model w/AX15 or if you had the NP-242 case.

The pin you show above looks to be from a D-30. A D-30 "lunch box" locker will work in a D-35 and vice versa bit not in the 8.25, its a much beefier axle.

Anyway, there is my useless knowledge of XJ axles.

 

What did the roll pin come from? (tiny pin on the left in your pic)

Is the longest pin from your rear axle?

You said it came out of a rear Chry 8.25? or did the guy you got it from say that?


I believe the long pin is for a Chry 8.25, the shorter pin is for a D35.(in your pic)
The little roll pin?? I've only seen them in a D30.
The D35 and Chrysler diffs use a small bolt not a roll pin.


A bolt like in the pic below

 

I learned something new. Thanks!

 

A D-30 and a D-35 use the same locker. He(the guy you bought it from) either lied to you or doesn't know what axle he has. You can use the locker(not the carrier) in your front axle.

Edit; I type too slow

 

Thank you both
The guy I got it from said it was out 0f his 8.25 but now I know it is for a d30
So tomorrow ill try to install it in the front

Also the pin in the left is what it came with and the one on the right is out if my 8.25

 

It could have been from a D-35, he just doesn't know his XJ axles. It should work in the D-30 just fine(the locker, not the carrier) but you will have to pull the carrier and remove the ring gear to install the locker. After loosening the caps, rotate an old rag through the ring and pinion to force the carrier out. If that doesn't work you may need a come-a-long and a strap to pull the carrier loose.

Mark the caps L/R and T/B so you don't put them back in wrong(the caps are machined while bolted into the housing so they are not all exactly the same) Not doing this can cause premature carrier bearing failure.

Mark the location of the ring gear to the carrier since the wear pattern is established(could be noisy if you don't but will work fine)

I recommend new ring gear bolts. Use red locktite on the bolt threads when installing the ring gear. Torque them to spec in a cross-pattern

Do not use locktite on the cap bolts, just torque them to spec.

Your back lash will not be affected by putting in a lunch box locker.

 

I just read all of your build on the other site, Ol blue is a beast!

 

Is there any adjustment on a d30 gears

 

Thanks!

As in?

Yes, on initial set-up you have to adjust the pinion depth and back-lash to get the proper tooth contact pattern on coast/drive. Then also you have to adjust the pinion bearing pre-load. On the D-30 all of this is done with shims and it requires the bearings to be pressed off and shims moved or added, then new bearings pressed on.

If your asking if the gears will need to be adjusted(re-set) after you install the lockright, the answer is no! Just remove the carrier, remove the ring gear, install the locker, then re-assemble.

The shims on a D-30 are in-bound from the carrier bearings so as you remove the carrier the only thing that will fall out will be the bearing cups(outer races). Those need to be kept with the side they came out of also. The backlash will not be affected by adding the drop-in or lunch box locker.

 

That's what I needed to know thanks

When I did that to my rear axle the adjusters came out as well and when I reinstalled it I didn't have it adjusted right

 

Correct! The 8.25 has side adjusters to adjust backlash. I have the proper wrenches for those buggers. They need to be tight! You can't make them too tight but being loose is bad! There is a real art to setting the backlash "just right" on a 8.25

The 8.25 is the simplest axle to set up second only to the Ford 9" and the Toyota center sections(both are identical)

 

Well I went and pulled another axle crime pic-a-part do im switching out my axles but now I have a spare axle if I can reset the gears

 

If I were closer that would only be a 10min job.

 

Damn to bad