I've had quite a few posts over the last month or so on the problems I've had with my differential pinion seal. Let me summarize what has been put on the truck since last month.
Transmission/tailshaft yoke and u-joint, plus new tailshaft housing seal.
Rear pinion yoke and u-joint and pinion seal (four of them)
Drained 75W-90 and added 75W-140. When the leak persisted I drained the Amsoil and now have Valvoline 80W-90. So far no leak. Now my question. What should I check for potential causes in the area of driveability. The truck does not vibrate, other than what I believe to be the normal vibrations of a CTD with a 4:10 rear. The mirrors shake, but I'm certain that is due to aerodynamics and they have since the day I drove it home. The dealer said the rear-end looks and feels tight. My drive shaft appears to be almost straight. Should there be more of a noticeable angle from the slip yoke u-joint back to the differential yoke? What about suspension? I'm green in this area and am learning. I get the concept in the service manual, but I have no practical exposure to rear-end problem solving. I want to be ahead of the curve if the leak comes back again, which I expect it probably will. TIA
John
Transmission/tailshaft yoke and u-joint, plus new tailshaft housing seal.
Rear pinion yoke and u-joint and pinion seal (four of them)

Drained 75W-90 and added 75W-140. When the leak persisted I drained the Amsoil and now have Valvoline 80W-90. So far no leak. Now my question. What should I check for potential causes in the area of driveability. The truck does not vibrate, other than what I believe to be the normal vibrations of a CTD with a 4:10 rear. The mirrors shake, but I'm certain that is due to aerodynamics and they have since the day I drove it home. The dealer said the rear-end looks and feels tight. My drive shaft appears to be almost straight. Should there be more of a noticeable angle from the slip yoke u-joint back to the differential yoke? What about suspension? I'm green in this area and am learning. I get the concept in the service manual, but I have no practical exposure to rear-end problem solving. I want to be ahead of the curve if the leak comes back again, which I expect it probably will. TIA
John
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