I'm doing a full change of the rubber ISO mounts, cradle modification, cast oil pan, etc. and I'm going to change my flex couplers as well. I bought two, one for the front and one for the back. Today I opened the tunnel cover and saw that there are 2 couplers on the rear of the drive shaft. My manual shows just one. Any body know why this is the case? Should I put 2 new ones in or try for just one? will one even work given the length of the shaft? I assume everything is original on this 1978 QL1450.
Front Flex Coupler (new):
2015-06-25 09.42.53.jpg
Double Rear Flex Couplers (old):
2015-06-25 09.42.33.jpg