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cornish rattler



Member Since: 31 Aug 2013
Location: Manchester
Posts: 642
United Kingdom 1988 Defender 90 200 Tdi CSW Bronze Green
Converting my 90 to rear disc brakes
Hi guys

I am thinking of converting my 1988 90 2.5TD ( 200TDI ) to rear disc brakes and just want to know is there convertion kits out there to do this or am i best off buying a s/h disco rear axle to re-build and fit to my 90 and is it a direct fit or do i need to do anything before hand to do to my 90 first Smile Graham

1988 Defender 90 county 200tdi ( Beast )

Paul Walker 1973-2013
( I Almost Had You )
Post #348537 31st Jul 2014 8:14am
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roel



Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039
Netherlands 2003 Defender 90 Td5 PU Caledonian Blue
I think the easiest and cheapest is to take an disco rear axle.
It should be a straight fit. The only thing I am not sure off is the brake force regulator. That is located below the brake mastercylinder on the chassis I believe. Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)
Post #348543 31st Jul 2014 9:01am
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diesel_jim



Member Since: 13 Oct 2008
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Posts: 6090
United Kingdom 2006 Defender 110 Td5 SW Epsom Green
Just stick on an ex disco or 90 rear axle.

Don't think you can convert the axle, as there's no tabs to bolt the calipers on to (and the Salisbury bracket won't fit the 90 axle)

You should be able to pick a whole axle up for not much money.
Post #348558 31st Jul 2014 9:59am
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uncas



Member Since: 22 Nov 2012
Location: Wentworth near Rotherham
Posts: 340
United Kingdom 
Neutral If you fit a 300 tdi Disco axle you will need a drive flange for the diff as the Disco has the rubber donut.

Uncas
Post #348618 31st Jul 2014 4:41pm
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cornish rattler



Member Since: 31 Aug 2013
Location: Manchester
Posts: 642
United Kingdom 1988 Defender 90 200 Tdi CSW Bronze Green
Ok are the defender 200 tdi and disco 300tdi drive flanges interchangeable Smile Graham

1988 Defender 90 county 200tdi ( Beast )

Paul Walker 1973-2013
( I Almost Had You )
Post #348695 31st Jul 2014 10:58pm
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diesel_jim



Member Since: 13 Oct 2008
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Posts: 6090
United Kingdom 2006 Defender 110 Td5 SW Epsom Green
uncas wrote:
Neutral If you fit a 300 tdi Disco axle you will need a drive flange for the diff as the Disco has the rubber donut.

Uncas


D'OH! forogt about that!

Yes, once you get the disco 3 pronged flange off (undo the bolt in the middle, get a puller or slide hammer and pull the flange off), you'll need a small spacer to fit in behind the flange. Ashcrofts sell these, although sometimes they come with the flange (if you've bought a new one). Might be one in your existing diff.

Another thought.... when you pull your old axle off, have a check at the diff that's in it... you might be lucky and have a 4pinion HD diff (with 24spline halfshafts), in which case you'd be better off swapping the whole diff over.
Post #348709 1st Aug 2014 7:01am
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cornish rattler



Member Since: 31 Aug 2013
Location: Manchester
Posts: 642
United Kingdom 1988 Defender 90 200 Tdi CSW Bronze Green
Nice one cheers i will have a look and see what both diff's are like once i get the other axle Thumbs Up Graham

1988 Defender 90 county 200tdi ( Beast )

Paul Walker 1973-2013
( I Almost Had You )
Post #348710 1st Aug 2014 7:10am
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uncas



Member Since: 22 Nov 2012
Location: Wentworth near Rotherham
Posts: 340
United Kingdom 
Graham fit a new seal with the flange. 300 tdi axles are 34 spline.

Uncas
Post #348722 1st Aug 2014 8:02am
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cornish rattler



Member Since: 31 Aug 2013
Location: Manchester
Posts: 642
United Kingdom 1988 Defender 90 200 Tdi CSW Bronze Green
Nice one cheers Smile Graham

1988 Defender 90 county 200tdi ( Beast )

Paul Walker 1973-2013
( I Almost Had You )
Post #348731 1st Aug 2014 8:46am
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diesel_jim



Member Since: 13 Oct 2008
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Posts: 6090
United Kingdom 2006 Defender 110 Td5 SW Epsom Green
uncas wrote:
Graham fit a new seal with the flange. 300 tdi axles are 34 spline.

Uncas



24 spline
Post #348732 1st Aug 2014 8:50am
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uncas



Member Since: 22 Nov 2012
Location: Wentworth near Rotherham
Posts: 340
United Kingdom 
You beat me Diesel Jim. Fat fingers typing on a little phone. I did mean 24 spline

Uncas
Post #348735 1st Aug 2014 9:07am
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