RDavisinVA
Technical Excellence Contributor
The Rear Disc Brake conversion in our 1983 110 was fairly easy.
We are converting a 1986 110 to LHD using a complete Disco I differential assembly, so we had the 110 front hubs available and used them.
Have been told that early Range Rover hubs will also work, but did not use them so cannot verify.
The rear Disco I hubs will not work.
I saw various long threads with incomplete part number lists and lots of chatter back and forth, but nothing that provided the answers I was looking for.
We also got some over the phone coaching from Keith in CO.
We didn't want to interfere with the shock mounts and do a direct bolt up.
1. Remove the rear wheels, hubs, brake drums, brake backing plate, and backing plate spacer.
2. Remove the rotors from the 110 front hubs.
3. Install the new rotors PN: LR017953, replaces part number FTC1381 which is a D90 rear rotor.
4. Machine the mounting surface (where it mates to the diff flange) of the FTC3306 caliper mounting bracket until the thickness across the mounting surface and the caliper mount is 1". This makes sure the calipers care perfectly centered on the brake rotor. Note we machined 160 thousand off one and 180 thousand off the other so the precision on the brackets were 20 thousand of an inch apart. I used a 3/4" drill bit to taper the face of the mounting threads and ran a M10X1.5 tap through the holes. The mounting bracket and machined surface is shown in the one of the pictures.
5. There are 4 M10X1.5 bolts needed per side to bolt the caliper mounting bracket to the rear diff flange. We removed 4 of the bolts that hold the rear axle half shafts to the rear hubs on the Disco I and used them to hold the front caliper mounting bracket on. Then found 2 - 12.9 bolts and nuts for the other 2 holes. You could also buy new bolts, but make sure they are at least 10.9.
6. We used rear Disco I calipers and robbed the 2 bolts for each one from the rear of the Disco I.
We are converting a 1986 110 to LHD using a complete Disco I differential assembly, so we had the 110 front hubs available and used them.
Have been told that early Range Rover hubs will also work, but did not use them so cannot verify.
The rear Disco I hubs will not work.
I saw various long threads with incomplete part number lists and lots of chatter back and forth, but nothing that provided the answers I was looking for.
We also got some over the phone coaching from Keith in CO.
We didn't want to interfere with the shock mounts and do a direct bolt up.
1. Remove the rear wheels, hubs, brake drums, brake backing plate, and backing plate spacer.
2. Remove the rotors from the 110 front hubs.
3. Install the new rotors PN: LR017953, replaces part number FTC1381 which is a D90 rear rotor.
4. Machine the mounting surface (where it mates to the diff flange) of the FTC3306 caliper mounting bracket until the thickness across the mounting surface and the caliper mount is 1". This makes sure the calipers care perfectly centered on the brake rotor. Note we machined 160 thousand off one and 180 thousand off the other so the precision on the brackets were 20 thousand of an inch apart. I used a 3/4" drill bit to taper the face of the mounting threads and ran a M10X1.5 tap through the holes. The mounting bracket and machined surface is shown in the one of the pictures.
5. There are 4 M10X1.5 bolts needed per side to bolt the caliper mounting bracket to the rear diff flange. We removed 4 of the bolts that hold the rear axle half shafts to the rear hubs on the Disco I and used them to hold the front caliper mounting bracket on. Then found 2 - 12.9 bolts and nuts for the other 2 holes. You could also buy new bolts, but make sure they are at least 10.9.
6. We used rear Disco I calipers and robbed the 2 bolts for each one from the rear of the Disco I.
