90 Rear Drum to Disc Swap - Defender Source
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Old April 27th, 2016, 12:32 PM
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TigerDan
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Dan
1991 RRC
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90 Rear Drum to Disc Swap

I'm about to do a rear drum-to-disc swap on an '83 90, I have a DI rear axle I'll swap in complete which will also give me 10-to-24 spline conversion as well as sway bar mounts (going to swap in the front as well.)

This 90 has a brake bias valve located on the right frame rail just forward of the bulkhead. I'm presuming I'll need to replace it, but I'm not sure. I've seen a lot of info saying replace it with one from a DI, or with one from a non-ABS RRC, or just leave it, or eliminate it. I was looking at the NTC8836 s a possibility.

Also wondering if I need to change the master cylinder. Looking at RovahFarm's site I don't a different one listed for disc or drum so I'm thinking not...
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1991 RRC 4.2, R380, LT230, TrueTrac, Detroit, sliders, 33s, blahblahblah....
1994 RRC LWB
1994 RRC SWB
1995 D90 project
1961 SII
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  #2  
Old April 27th, 2016, 12:35 PM
javelinadave
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Same MC so no swap required.
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