Earlier I already changed the 240 mm front brakes for 260 mm brakes. Now it was time to replace the standard rear drums for discs.



Removed the exhaust, towbar brackets and the shocks.



The whole rear beam was being replaced by this:



The beam from a Granada Cosworth 24v, with lsd, 18 mm arb and also disc brakes.



And with the beam fitted. The shocks have been replaced by Koni shocks for a Sierra Cosworth as the lower fitment is different than on a standard Sierra. It still has the 5 stud Granada hubs.



Removing the Granada hubs is a bit of a pain. The Sierra hubs have a hole in the drive flange to undo the bolts to the arms, but the Granada doesn't have that.



I had to modify the towbar brackets a bit because the 7.5" diff didn't fit.





And changed the Granada hubs for the Sierra hubs. I fitted the smaller bearing carriers as I was going to fit the 253 mm solid discs instead of 273 mm.



And the discs and caliper carriers fitted.





The rear beam now also had the mounting holes for the ABS sensors. Unfortunately my shell didn't have the holes for the sensors.

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Fitted the calipers to both sides.





And the exhaust back on.

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I didn't want to cut the ABS cables, so I drilled the holes for the sensor cables in the floor.



And the car back on its wheels.



The rear camber was a bit negative now as the Granada arms have slightly more camber than the Sierra ones due to the higher ride height.





To fix the camber problem I fitted a couple of shims in between the bearing carriers and the arms.