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Old 02-17-2014, 05:01 PM   #1
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Default WD21 rear end in 96 D21 4x4

I'd like to get a LSD from a WD21 for my D21. I have the h233b so I thought about just getting the pumpkin but then I thought disc brakes would be nice while I'm there. Got to looking at prices at the local junkyard and it's more expensive for the pumpkin, axles, and calipers than it is for the whole axle. So now I'm thinking about just taking the whole axle, welding on some leaf spring perches and bolting it up. I've read a bunch of posts about it but have just a couple questions.

1) What size perches do I need?

2) Will the perches fit without cutting off the brackets for the pathy suspension? (Would like to keep my options open for a different suspension setup later on, but can always weld brackets back on)

3 )Besides the e-brake cable is there any other issues you guys can think of?

Thanks!
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Old 02-17-2014, 10:16 PM   #2
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I cant find the thread, but there is one that discusses every issue in depth. What I remember is that there is only a couple of years lsd/disc that are the right length to fit. don't quote me but IIRC 94-95
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Old 02-17-2014, 10:35 PM   #3
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axle is easy to swap out. cut off all the brackets for the 4-link and panhard bar then weld on the spring perches at the correct pinion angle.

use this to measure...


and buy some leaf spring perches that fit the axle...

https://www.google.com/#q=leaf+spring+perches

you think swapping the pumpkin is easy, well in a sense it is, but that's why there are axle shims on the axle ends to fit to the third member. not all axles shim the same just as not all gear sets shim the same. I've seen them (the third members) swapped out with no issues many times. is it the correct way to do...no. just saying that if you don't find a rear disc version. incidently, the parking brake will need fabbing to work or you can (if you have the center parking brake already) use a 2nd parking lever to use as a cutting brake when 4 wheeling when one wheel lifts off the ground.
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Last edited by dvdswan; 02-17-2014 at 10:48 PM.
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Old 02-18-2014, 12:09 AM   #4
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Quote:
Originally Posted by dvdswan View Post
axle is easy to swap out. cut off all the brackets for the 4-link and panhard bar then weld on the spring perches at the correct pinion angle.

use this to measure...


and buy some leaf spring perches that fit the axle...

https://www.google.com/#q=leaf+spring+perches

you think swapping the pumpkin is easy, well in a sense it is, but that's why there are axle shims on the axle ends to fit to the third member. not all axles shim the same just as not all gear sets shim the same. I've seen them (the third members) swapped out with no issues many times. is it the correct way to do...no. just saying that if you don't find a rear disc version. incidently, the parking brake will need fabbing to work or you can (if you have the center parking brake already) use a 2nd parking lever to use as a cutting brake when 4 wheeling when one wheel lifts off the ground.
Thanks DVDSWAN
As JohnnyRingo mentioned is there any specific year that I should be looking for? Or do I just need an h233b with the same gearing?
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Old 02-18-2014, 01:48 AM   #5
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don't know the exact years but there are 2 styles of H233Bs. yes, you want to match the axle code. but IIRC you can tell by the bolts mounting the 3rd member. either the number of or the style. IIRC it was the number of bolts from 9 to 11 starting in 1990. this appears to be the same time they changed the ring gear bolts from 10mm to 12mm.
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Old 02-18-2014, 02:05 AM   #6
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Quote:
Originally Posted by dvdswan View Post
don't know the exact years but there are 2 styles of H233Bs. yes, you want to match the axle code. but IIRC you can tell by the bolts mounting the 3rd member. either the number of or the style. IIRC it was the number of bolts from 9 to 11 starting in 1990. this appears to be the same time they changed the ring gear bolts from 10mm to 12mm.
I remembered reading something about that. Just found it again, looks like 90 and beyond use the 11 bolt and previous use the 9 bolt. So I would need a 90+ HG46 with LSD and disc brakes right?

Once the snow melts I'll be on the hunt for one!
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Old 02-18-2014, 02:08 AM   #7
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sounds good. just remember you need to fab up something for the e-brake.
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Old 02-18-2014, 02:12 AM   #8
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Thanks for your help guys!
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Old 02-18-2014, 02:49 AM   #9
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Tons of axle information
VVVVVVVV
http://forums.nicoclub.com/all-you-n...4-t233955.html
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Old 02-18-2014, 07:02 AM   #10
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Cutting off the pathy brakets in a PITA. I spent more time cutting those off than measuring and welding on the new perches. The brake line T on the axle is in a different place than the stock one and if I remember right the stock one looked really short so I purchased a longer one.

Oh, don't forget about gear ratios. Most pathys have a 4.625 final ratio and most 4x4 hardbodies have the 4.375 ratio... Obviously this will create a problem and there are three fixes to the situation. 1) change front diff with pathy one 2) swap ring and pinions from truck thirdmember to the pathy one 3) run a 28" tire in the front and 31" tire in the rear, almost cancels out the difference. I wouldn't suggest the latter, lol

Cheers
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