Swapping in a rear Disco Axle Assembly - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old July 6th, 2012, 06:22 PM
bossman429's Avatar
bossman429
Status: Offline
Adrian
1988 90
Member
 
Join Date: Jul 2011
Location: Red Bank, NJ, USA
Posts: 1,416
Registry
Swapping in a rear Disco Axle Assembly

So I'm gonna attempt to swap over this Disco rear axle assembly I got from Randy when I blew up my front CV. I was going to build this thing up first, but with a wedding and kitchen renovation I'll save that for another year with less money flying out my pocket.

So - Anything to take note? Should it swap right over? I would just swap the guts but I figured nows a good time to get the disc brakes on too, and I'm assuming i need to swap the whole assembly to do that.

I did notice the drive flange doesn't have that pop off cap like my 90 does? anyway to swap those over so I can keep them looking the same? Are the drive flanges interchangable?

Any good write ups on this? I'll see what bushings may need to be replaced and Get those on order.... I'm hoping its a straight swap.

Thanks in advance The front swap worked out great and is drivign great as well
__________________
1967 Series IIa 109 5 Door - Work in progress
'98 Toyota Land Cruiser 100 Series
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old July 6th, 2012, 06:28 PM
diesel_jim's Avatar
diesel_jim
Status: Offline
Jamie Austin
1992 110 Td5 CSW & 1989 MB G-Wagen
Member
 
Join Date: Oct 2005
Location: Wiltshire, UK
Posts: 1,449
The disco axle is a straight swap into a 90. you /may/ find the brake pipes have a different thread on the brass T piece, bit this was only on really early rangie axles I think. certainly all the ones i've played with have fitted the 90/110 rear rubber pipe no problem.

The driveshafts are probably the "dome" type on the end? (or maybe a flat type)... either way they're usually one piec, which helps alleviate the backlash and "clunk" from worn splines in the drive member. the domed shafts were all 10 spline, some of the later flat ones (all in fact I think) were 24 spline, meaning you can pop in an ARB RD56 or RD128 or 4pinion HD diff (both 24spline) with no problem.

It's a good conversion. upgrades the brakes in one easy job.
Reply With Quote
  #3  
Old July 7th, 2012, 10:53 AM
don's Avatar
don
Status: Offline
Don Bunnell
'86 110 3dr ST
Member
 
Join Date: Sep 2007
Location: Rumson, NJ
Posts: 4,272
Registry
There isn't much to it. I would get the trailing arms bushings redone while you have them out and accessible.

The mother f-er of the whole thing is the a-arm bushing piece. I have the 30mm spanner that just fits in there. I would take that whole thing apart and get a new one. I have an extra if you want to get done and then you can just pop it in.

The only other thing is getting the truck on a nice level piece with good support. I used a couple of old pieces of tree and rested the frame on them. That way I could work underneath and not worry about a jackstand being totally extended and wobbly.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old July 7th, 2012, 09:35 PM
chris snell's Avatar
chris snell
Status: Offline
Chris Snell
87 Ex-MOD 110
Member
 
Join Date: Aug 2005
Location: Kansas
Posts: 2,439
It's a piece of cake. I used a proper shop lift to do mine and I did the actual swap by myself in an afternoon.

I went all-out and sourced a used axle in good condition, then had it mediablasted and had the outboard welds reinforced with some welded steel straps--not necessary but it gave me peace of mind after breaking an axle tube in the desert.

Once my axle was mediablasted, I used Eastwood's etching primer and repainted it with Eastwood Chassis Black. It looks great.

Pics here: http://www.flickr.com/photos/defende...7630471195350/
Reply With Quote
  #5  
Old July 8th, 2012, 03:23 AM
Jake1996d1's Avatar
Jake1996d1
Status: Offline
Jake
96 Disco/88 RRC
Member
 
Join Date: May 2011
Location: Ankeny IA
Posts: 451
Quote:
Originally Posted by JSBriggs View Post
If you are using the disco 3rd member, you will need to convert it to a 4 bolt yoke from the rotoflex. There are various write ups on how to do it.

-Jeff
Unless it's a 98 or 99 D1

Aint nothin to it but to do it. Get to work!
Reply With Quote
  #6  
Old July 8th, 2012, 10:02 AM
bossman429's Avatar
bossman429
Status: Offline
Adrian
1988 90
Member
 
Join Date: Jul 2011
Location: Red Bank, NJ, USA
Posts: 1,416
Registry
It has a three bolt yoke on it now. Will have to see how to swap it out
__________________
1967 Series IIa 109 5 Door - Work in progress
'98 Toyota Land Cruiser 100 Series
Reply With Quote
  #7  
Old July 8th, 2012, 10:30 AM
Jake1996d1's Avatar
Jake1996d1
Status: Offline
Jake
96 Disco/88 RRC
Member
 
Join Date: May 2011
Location: Ankeny IA
Posts: 451
http://www.discoweb.org/rotoconversion/index.htm
Reply With Quote
  #8  
Old July 8th, 2012, 11:39 PM
bossman429's Avatar
bossman429
Status: Offline
Adrian
1988 90
Member
 
Join Date: Jul 2011
Location: Red Bank, NJ, USA
Posts: 1,416
Registry
Looks straight forward. I'm guessing an impact gun will take the pinion but off real easy
__________________
1967 Series IIa 109 5 Door - Work in progress
'98 Toyota Land Cruiser 100 Series
Reply With Quote
  #9  
Old July 9th, 2012, 07:36 AM
bossman429's Avatar
bossman429
Status: Offline
Adrian
1988 90
Member
 
Join Date: Jul 2011
Location: Red Bank, NJ, USA
Posts: 1,416
Registry
Quote:
Originally Posted by JSBriggs
Keep in mind that you will still need a newer 4 bolt yoke, as the early pinions have a coarse spline while the later pinion has fine spline.

-Jeff
Gotchya. So I can't just use the one on my truck now I guess
__________________
1967 Series IIa 109 5 Door - Work in progress
'98 Toyota Land Cruiser 100 Series
Reply With Quote
  #10  
Old August 3rd, 2012, 04:17 PM
bossman429's Avatar
bossman429
Status: Offline
Adrian
1988 90
Member
 
Join Date: Jul 2011
Location: Red Bank, NJ, USA
Posts: 1,416
Registry
Quote:
Originally Posted by JSBriggs View Post
Correct. You will need the spacer too.

You can reuse the bolts, just get new nylocks.

-Jeff

FInally tore this thing apart today. Gonna clean it all up first but is this what I need?

http://www.roverparts.com/Parts/STC3722.cfm
__________________
1967 Series IIa 109 5 Door - Work in progress
'98 Toyota Land Cruiser 100 Series
Reply With Quote
  #11  
Old August 3rd, 2012, 04:42 PM
bossman429's Avatar
bossman429
Status: Offline
Adrian
1988 90
Member
 
Join Date: Jul 2011
Location: Red Bank, NJ, USA
Posts: 1,416
Registry
Quote:
Originally Posted by chris snell View Post
It's a piece of cake. I used a proper shop lift to do mine and I did the actual swap by myself in an afternoon.

I went all-out and sourced a used axle in good condition, then had it mediablasted and had the outboard welds reinforced with some welded steel straps--not necessary but it gave me peace of mind after breaking an axle tube in the desert.

Once my axle was mediablasted, I used Eastwood's etching primer and repainted it with Eastwood Chassis Black. It looks great.

Pics here: http://www.flickr.com/photos/defende...7630471195350/

Did you just use tape to cover the areas you didn't want blasted? Like inside the pumpkin and the ends of each axles?
__________________
1967 Series IIa 109 5 Door - Work in progress
'98 Toyota Land Cruiser 100 Series
Reply With Quote
  #12  
Old August 3rd, 2012, 09:38 PM
brn24whl's Avatar
brn24whl
Status: Offline
Eric
1994 RRC SWB
Member
 
Join Date: Aug 2006
Location: Capital District NYS
Posts: 1,214
Registry
Quote:
Originally Posted by JSBriggs
Looks like it, but call Eric (brn24whl) he works there and can tell you what is in the kit. 1-800-533-2210 ext 231

-Jeff
You will need all the parts in this kit but the driveshaft and maybe the bolts if your reusing yours http://www.roverparts.com/Parts/9300.cfm

Cheers
Eric
__________________
Eric Riston
Commission-Based Retail Sales Representative
1-800-533-2210 ext 231
Direct Line 518-539-2231

If ordering on our online site please choose me as the sales rep. If placing a phone order please call me directly at the numbers above.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #13  
Old August 3rd, 2012, 10:33 PM
bossman429's Avatar
bossman429
Status: Offline
Adrian
1988 90
Member
 
Join Date: Jul 2011
Location: Red Bank, NJ, USA
Posts: 1,416
Registry
Great. Thanks Eric. I'll order Monday.
__________________
1967 Series IIa 109 5 Door - Work in progress
'98 Toyota Land Cruiser 100 Series
Reply With Quote
  #14  
Old August 29th, 2012, 04:48 PM
bossman429's Avatar
bossman429
Status: Offline
Adrian
1988 90
Member
 
Join Date: Jul 2011
Location: Red Bank, NJ, USA
Posts: 1,416
Registry
Got the hub and brakes on. Quick ? Is the bleeder screw the bottom or top hole? Forgot which went where.
__________________
1967 Series IIa 109 5 Door - Work in progress
'98 Toyota Land Cruiser 100 Series
Reply With Quote
  #15  
Old August 29th, 2012, 04:49 PM
bossman429's Avatar
bossman429
Status: Offline
Adrian
1988 90
Member
 
Join Date: Jul 2011
Location: Red Bank, NJ, USA
Posts: 1,416
Registry
Whoops. Forgot the pic

I have it In the bottom but don't remember if that's right
Attached Thumbnails
Click image for larger version

Name:	image-207261448.jpg
Views:	77
Size:	507.3 KB
ID:	56726  
__________________
1967 Series IIa 109 5 Door - Work in progress
'98 Toyota Land Cruiser 100 Series
Reply With Quote
  #16  
Old August 29th, 2012, 05:22 PM
Roverlab
Status: Offline
Trevor Griffiths
85 110, 92 110, 92 RR, 06 LR3
Member
 
Join Date: Jan 2008
Location: Elizabethotwn, PA
Posts: 1,647
Bleed screw is horizontal, so should be in the top hole.
__________________
Roverlab is now British 4x4 Specialists.
Email is
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Same place, new dogs.
Reply With Quote
  #17  
Old August 29th, 2012, 05:32 PM
bossman429's Avatar
bossman429
Status: Offline
Adrian
1988 90
Member
 
Join Date: Jul 2011
Location: Red Bank, NJ, USA
Posts: 1,416
Registry
Yea just looke at he brake lines. That makes sense. Thanks!
__________________
1967 Series IIa 109 5 Door - Work in progress
'98 Toyota Land Cruiser 100 Series
Reply With Quote
  #18  
Old August 29th, 2012, 06:34 PM
bossman429's Avatar
bossman429
Status: Offline
Adrian
1988 90
Member
 
Join Date: Jul 2011
Location: Red Bank, NJ, USA
Posts: 1,416
Registry
Next question - I went to put the 4 bolt flange on my third member, and I can see my pinion has too much play in it, i can push it in and out about 1/4-3/8" I'm guessing it has to be dissassembled and put back together? Anyone have a write up on this process?

oooor... this could be a great motivator to drop in a True-trac. I'd love a detroit but I dont want to spend the money on upgraded axles.

Where is everyone buying there third members assembeld with a tru-trac from?
__________________
1967 Series IIa 109 5 Door - Work in progress
'98 Toyota Land Cruiser 100 Series
Reply With Quote
  #19  
Old August 29th, 2012, 08:18 PM
don's Avatar
don
Status: Offline
Don Bunnell
'86 110 3dr ST
Member
 
Join Date: Sep 2007
Location: Rumson, NJ
Posts: 4,272
Registry
That might be within Rover specs, haha. The diffs have quite a bit of play.

I think a rear locker improves on trail driving a bunch. I would do a search on the Trutracs tho - I thought they were harder on axles by the way they engage than the Detroits but could very well be wrong.

Also, what about the lsd from Ashcroft? Justin @ Lucky 8 had good thing to say about them.
Reply With Quote
  #20  
Old August 29th, 2012, 09:12 PM
bossman429's Avatar
bossman429
Status: Offline
Adrian
1988 90
Member
 
Join Date: Jul 2011
Location: Red Bank, NJ, USA
Posts: 1,416
Registry
The true trac applies less tq to the axles than a Detroit locker. Max of 75% to any one axle. Where as the Detroit applies 100%. Plus the Detroit can get damaged when an axle fails. Where as the trutrac doesn't have that issue.

Doesn't the Ashcroft require air? Not looking to add that.
__________________
1967 Series IIa 109 5 Door - Work in progress
'98 Toyota Land Cruiser 100 Series
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
assembly, axle, disco

Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
1996 Disco 35s, locked, etc... WBDISCO For Sale - Vehicles 0 November 2nd, 2005 10:41 AM
Salisbury Rear Axle for Sale Northface For Sale - Parts 1 August 12th, 2005 06:54 PM
Help empty my garage! Ton's of parts.. RedRhinoProducts For Sale - Parts 12 June 1st, 2005 09:24 AM
Stock diff, stock rear axle half shafts..... nilesj For Sale - Parts 5 October 15th, 2004 11:10 AM
OME shocks are too long on rear axle... wicks Defender Technical Discussions 5 October 6th, 2003 02:39 PM


All times are GMT -5. The time now is 04:39 AM.


Copyright