Title: Jurid Flexible Coupling Replacement
Owner: Don B , added Mar 04 2013 06:29:33
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1754x1674 202kb(If the image has failed to load, click on it to view large version) Description: Except on early XJ40s, the driveshaft connects to the differential with a flexible coupling, commonly called a “Jurid” after the original German manufacturer. Compared to a U-joint, the Jurid reduces perceived vibration and harshness. But as the Jurid ages, it deteriorates and cracks.
2118x1874 205kb(If the image has failed to load, click on it to view large version) Description: Accessing all six bolts that secure the Jurid requires rotating the driveshaft. Chock the front wheels and put the transmission in Neutral. If you use ramps instead of jack stands, jack up one wheel till it is free to turn. Turning the wheel will rotate the driveshaft to access each bolt.
2600x2309 214kb(If the image has failed to load, click on it to view large version) Description: A box-end wrench on the back and a ratchet & socket or ratcheting wrench on the front make quick work of removing the nuts from all six bolts.
2626x1859 232kb(If the image has failed to load, click on it to view large version) Description: The three bolts with heads on the diff side do not have enough clearance to be removed. Align the Jurid so you can push the bolts back till their ends are flush with the Jurid surface. Now they won’t interfere while pulling the driveshaft out of the Jurid.
2678x2255 214kb(If the image has failed to load, click on it to view large version) Description: Try pulling the driveshaft forward by hand. If you can’t get it clear of the Jurid, try using a pry bar to lever it out.
4000x2072 223kb(If the image has failed to load, click on it to view large version) Description: If you can’t pry the driveshaft out of the Jurid, scribe or paint around the four screws that secure the driveshaft center bearing (arrows), remove the screws to free the bracket so the center bearing can move forward, then use the pry bar to lever the driveshaft out of the Jurid.
3150x1249 234kb(If the image has failed to load, click on it to view large version) Description: Push the driveshaft to the side, orient the driveshaft and pinion flanges to give the most clearance, and tilt and wiggle the Jurid out from between them.
3300x1836 226kb(If the image has failed to load, click on it to view large version) Description: The old Jurid (left) compared with the new, showing identical markings. This Jaguar OE part was made in Germany by the English-based firm GKN, the same company that made the XJ40 Salisbury differential.
2906x2822 205kb(If the image has failed to load, click on it to view large version) Description: The first Jurid I ordered was this aftermarket part, marked only “B869” and shipped in a ÜRO Parts package. This thing vibrated violently. I tried all three positions on the driveshaft and all three on the diff pinion flange, but it wouldn’t balance. I returned it and ordered a Jaguar OE part.
2017x1503 187kb(If the image has failed to load, click on it to view large version) Description: Wiggle the new Jurid onto the diff flange, ensure it is oriented properly with the diff flange holes, then work the three rear-mounted bolts into their holes. Then use both hands to pull the driveshaft forward and swing it into the Jurid hole. I was able to do it without using the pry bar.
2900x2130 227kb(If the image has failed to load, click on it to view large version) Description: Reconnecting the driveshaft center bearing bracket can be fiddly. Use a tapered punch as a drawbore pin to align one screw hole while inserting the adjacent screw, then repeat on the other end. Tighten both screws until nearly tight, then install screws in the holes in which you used the punch.
2350x2016 228kb(If the image has failed to load, click on it to view large version) Description: Because the Jurid loses its resilience and durometer hardness gradually, we tend to forget how acceleration is supposed to feel in a Jaguar. The new Jurid is vibration-free and smooth as silk, but the car now has a more direct, “hooked up” feel on acceleration. An easy job and a nice improvement.
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