Hello everybody, I've purchased an original brand new diff (old stock) for my Series SWB with Rover axles. I've noticed, before installing it, that was almost impossible to turn the pinion without a great amount of force applied. So I proceeded to slacken the pinion bolt and everything turned without problems. When I installed the diff at the rear axle, I re-installed the pinion nut and torqued it to the correct amount found on the green bible (130nm). After that I wasn't able again to turn the pinion without applying much force. Now I'm worried that too much strain on the pinion bearings is applied, and also I notice a pitched vibration when accelerate or decelerate from 40+ mph. Don't want to destroy this brand new diff! So, it is normal that it is almost impossible to turn the pinion at hand? Or I have to slacken the nut and let the diff rotate without drag, although at a lower torque value of the nut? Pretty confused...
