joemarshall Posted January 17, 2021 Share Posted January 17, 2021 Does anyone know if callipers from a 200 and 300 tdi discovery are the same? Swapping an axle over on my 90 and can’t be arsed to change the brakes because they are decent. Cheers, Joe Quote Link to comment Share on other sites More sharing options...
Retroanaconda Posted January 17, 2021 Share Posted January 17, 2021 200Tdi ones are likely to be imperial à la early Range Rover, though very late ones could be metric. 300 will definitely be metric. Main difference is the bolts holding the calipers to the axle brackets. Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted January 17, 2021 Share Posted January 17, 2021 I'm sure the 200 & 300 caliper bolts are metric James and had been since the start of the 90/110. Mo Quote Link to comment Share on other sites More sharing options...
Retroanaconda Posted January 17, 2021 Share Posted January 17, 2021 He was asking about Disco axles though Mo. I had a 200Tdi Disco axle on the back of my 90 for a while and it had imperial hex-head caliper bolts. I then swapped it for a 300Tdi Disco axle which has bi-hex head metric caliper bolts and is also practically identical to a 300Tdi 90 rear axle. Quote Link to comment Share on other sites More sharing options...
joemarshall Posted January 17, 2021 Author Share Posted January 17, 2021 Yes that’s the only difference I can see is the bolts are different. Hex head on the 200 and 12 point on the 300. Without trying then I’m unsure but they look identical. Quote Link to comment Share on other sites More sharing options...
Retroanaconda Posted January 17, 2021 Share Posted January 17, 2021 One will be UNF and the other metric fine. It’s not a thing you want to cut corners on, so you’re best bet would be to buy a set of new rear calipers to suit the new axle. You could probably use the metric bolts to fit your imperial calipers to the new axle, assuming that’s the way around you are swapping things, but I wouldn’t suggest it. I wouldn’t want to drive a vehicle with the wrong sized bolts holding the brake calipers on. Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted January 17, 2021 Share Posted January 17, 2021 2 hours ago, Retroanaconda said: He was asking about Disco axles though Mo. I'll get my coat ... Mo 😬 Quote Link to comment Share on other sites More sharing options...
Retroanaconda Posted January 17, 2021 Share Posted January 17, 2021 To be fair Mo, it is the Defender forum Quote Link to comment Share on other sites More sharing options...
landroversforever Posted January 17, 2021 Share Posted January 17, 2021 My rear axle is a 200 era D1 axle and its got the imperial caliper bolts. 7/16UNF IIRC. Quote Link to comment Share on other sites More sharing options...
joemarshall Posted January 18, 2021 Author Share Posted January 18, 2021 Just checking through some old receipts and ironically the callipers on the 200tdi axle are/should be STC1265/4 which when cross referenced are the 300tdi axle callipers. So i have had 300tdi callipers on a 200tdi axle for the least few years. So they should swap over fine? Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted January 18, 2021 Share Posted January 18, 2021 The clearance holes for the mounting bolts are different sizes in either caliper IIRC though which is bigger, imperial or metric, I can't remember. Otherwise they are the same item. Mo Quote Link to comment Share on other sites More sharing options...
Troll Hunter Posted January 19, 2021 Share Posted January 19, 2021 Please, please, use a thread gauge to measure the thread spacing, tpi or mm/thread, and use a mircrometer to measure the thread diameter. Then, please, use the correct bolts. Many SAE thread and bolt sizes are very close to Metric sizes, but they are not interchangeable. Please use compatible bolts and nuts. Mike 1 Quote Link to comment Share on other sites More sharing options...
Geojake Posted January 22, 2021 Share Posted January 22, 2021 On 1/17/2021 at 9:57 PM, landroversforever said: My rear axle is a 200 era D1 axle and its got the imperial caliper bolts. 7/16UNF IIRC. Same for me, I have a RR classic rear axle on my 90 with 7/16 UNF thread. I learnt this when trying to put metric bolts in..... 1 Quote Link to comment Share on other sites More sharing options...
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