Discovery 1 rear axle into Defender questions - Defender Source
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  #1  
Old February 28th, 2014, 08:51 PM
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Discovery 1 rear axle into Defender questions

All:

I spent the last half hour searching, to no avail...

-D1 axle has a 3-hole drive shaft, whereas my Defender has a 4-hole. Options? (I saw a link to a solution thread on Discoweb but can't find it)

-D1 axle has 2 brake lines, Defender has one. Just swap the Defender T-part in?

-What brake fluid does the defender use?

Thanks in advance,

Paul.
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  #2  
Old February 28th, 2014, 09:00 PM
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You can swap the 3 hole flange for the 4 hole. You have to remove the big nut in the center them use a puller of some kind to get it off.
Just swap in the T off your existing axle for the brake lines.
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  #3  
Old February 28th, 2014, 09:27 PM
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Quote:
Originally Posted by One Ten View Post
You can swap the 3 hole flange for the 4 hole. You have to remove the big nut in the center them use a puller of some kind to get it off.
Just swap in the T off your existing axle for the brake lines.
There is no nut on the Discovery 1 three hole flange. Is it inside the diff?
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #4  
Old February 28th, 2014, 09:36 PM
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Quote:
Originally Posted by Paul K View Post
There is no nut on the Discovery 1 three hole flange. Is it inside the diff?
There must be! It has to be held on some way.

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  #5  
Old February 28th, 2014, 09:47 PM
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This is what the end looks like...

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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #6  
Old February 28th, 2014, 09:50 PM
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Quote:
Originally Posted by Paul K View Post
This is what the end looks like...

There is a Land Rover special tool for removing that piece. I'm sure there is a thread somewhere on how to remove it without a special tool. I suppose a slide hammer would work. There is a bolt under it with a 15mm bolt head IIRC.
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  #7  
Old February 28th, 2014, 09:53 PM
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Quote:
Originally Posted by Jymmiejamz View Post
There is a Land Rover special tool for removing that piece. I'm sure there is a thread somewhere on how to remove it without a special tool. I suppose a slide hammer would work. There is a bolt under it with a 15mm bolt head IIRC.
I just scraped all the crud off, and didn't see any pin, bolt or other fixture that holds it on.

I am sure I saw a thread on Discoweb about how to make a 4-hole fit a 3-hole. Sound familiar?

Edit: How about using the diff from my current axle? Would it fit?
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #8  
Old February 28th, 2014, 09:55 PM
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Here you go:
http://www.discoweb.org/rotoconversion.htm
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  #9  
Old February 28th, 2014, 10:10 PM
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or just swap the diff over
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  #10  
Old February 28th, 2014, 10:17 PM
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Quote:
Originally Posted by Paul K View Post
I just scraped all the crud off, and didn't see any pin, bolt or other fixture that holds it on.

I am sure I saw a thread on Discoweb about how to make a 4-hole fit a 3-hole. Sound familiar?

Edit: How about using the diff from my current axle? Would it fit?
What axle is in your current setup?

If you use a slide hammer with a stud threaded into the peg, it should come right out. I was thinking of a DII that has the 15mm bolt. A D1 diff would have the large nut.
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  #11  
Old February 28th, 2014, 10:21 PM
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Quote:
Originally Posted by Jymmiejamz View Post
What axle is in your current setup?

If you use a slide hammer with a stud threaded into the peg, it should come right out. I was thinking of a DII that has the 15mm bolt. A D1 diff would have the large nut.
Current is whatever was stock in 1985.

Do I understand correctly that a slide hammer will remove the 3- hole part, then I can pound the 4-hole part on in its place?
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #12  
Old February 28th, 2014, 10:27 PM
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No way a slide hammer gets that thing out.

The first time I converted one I used sockets and a bolt to assemble a puller. The I.D. of the nipple is threaded.

The most recent one I removed the diff, threw it in the trash, and then put a disco front diff in its place.
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  #13  
Old February 28th, 2014, 10:30 PM
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Quote:
Originally Posted by JSBriggs View Post
Paul, you will need a new yoke ands spacer for the disco axle. The your current yoke and pinion is the old style coarse (4) spline, while the disco pinion is the newer fine spline.

-Jeff
Damn it, I thought this would be straight forward. Any idea on part numbers?

Sounds like the best solution here is going to be keeping my '85 diff?
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #14  
Old February 28th, 2014, 10:34 PM
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Ashcroft says they redrill the hole for a larger bolt before attempting pulling that pin.

My D1 axle came out of a 1999. I think 97+ (or is it 98?) they switched back to a 4 bolt flange.
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  #15  
Old February 28th, 2014, 10:38 PM
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Quote:
Originally Posted by javelinadave View Post
Awesome! This is exactly what I was looking for.

Quote:
Originally Posted by JSBriggs View Post
Yes. the discoweb link that Dave posted is a good step by step. you can see that the snout is internaly threaded for a bolt to be used with slide hammer. I have heard it can me VERY tight. As i mentioned you will need the yoke and spacer as well. John Gadd (roverdude) might have it.

-Jeff
Thanks Jeff! I PM'd RoverDude.
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #16  
Old February 28th, 2014, 10:54 PM
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Paul, probably the third time I have told you this, but KEEP the 85 diff! It should be a 24 spline four pin (ie much stronger) carrier. If it is 10 spline, then swap the pinion as described above. The diff swap is easy. Just pull the axle shafts and unbolt the diff.
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  #17  
Old February 28th, 2014, 11:18 PM
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Quote:
Originally Posted by evilfij View Post
Paul, probably the third time I have told you this, but KEEP the 85 diff! It should be a 24 spline four pin (ie much stronger) carrier. If it is 10 spline, then swap the pinion as described above. The diff swap is easy. Just pull the axle shafts and unbolt the diff.

Okay, I'll disassemble both & compare, then do as prescribed. How likely is it to be a ten spline? I seem to remember they mixed it up pretty well?

Another thought- should I replace any of the A-frame stuff on top of the diff? I have read that the parts can wear, causing clunking.
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #18  
Old February 28th, 2014, 11:33 PM
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Quote:
Originally Posted by JSBriggs View Post
Dont dissasemble. On your existing axle, pull the short side shaft. if its 24 spline, then procede with the diff swap. If its 10 spline, then swap the yoke on the Disco axle.

-Jeff
Will do!

I will also be installing some Dynamat this weekend...
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #19  
Old February 28th, 2014, 11:36 PM
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Anything is possible, but my understanding is rear diffs in early V8 90s were the 4 pin 24 spline. The a frame ball joint is something I would consider replacing it it looks at all worn. Check bushings too, but if they all good and feel good, I would just run them.
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  #20  
Old February 28th, 2014, 11:53 PM
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Quote:
Originally Posted by evilfij View Post
Anything is possible, but my understanding is rear diffs in early V8 90s were the 4 pin 24 spline.
Fingers crossed!

Quote:
Originally Posted by evilfij View Post
The a frame ball joint is something I would consider replacing it it looks at all worn. Check bushings too, but if they all good and feel good, I would just run them.
Ok. The brake discs & pads on the donor axle look good. I will swap the diff oil no matter what.
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
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Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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