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Power Strokes
6.4 Tech
Driveline vibrations
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[QUOTE="kleake, post: 1405758, member: 25987"] Well, I can't say they are perfectly straight, but they are not obviously at an angle either. Also, I understand driveline angle, and have dealt with that on my jeep with a single shaft and no carrier. Both angles should be identical or you will have vibrations. Now with the carrier and 3 joints, it gets more tricky. Now if I understand what I have changed, and what it's doing, then I "think" i'm going the right direction. Let me see if I can explain: If I accelerate more=more axle wrap, causing the pinion to raise. Higher pinion=more vibration. The shims lowered the pinion, so that should have reduced the effective wrap. Also, raising the carrier 1" will change the angle at both ends and effectively reduce the effect of the wrap as well, but will also change the angle at the tailshaft. This did improve it though, so it seems I was headed the right direction. These are the two things I have done per this TSB 09-4-9: [URL="https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwiHyNDu6f3OAhXkx4MKHcQVB5IQFghGMAM&url=http%3A%2F%2Fwww.powerstroke.org%2Fforum%2Fattachments%2F6-4-drivetrain-problems%2F11130d1257385850-weird-shutter-vibration-tsb-09.4.9.pdf&usg=AFQjCNFQ_c8ijOcnKR1EnaO5eI83tHPx_Q&sig2=-JVOZNYqgEhWWOldNcbEgw&bvm=bv.131783435,d.amc"]https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwiHyNDu6f3OAhXkx4MKHcQVB5IQFghGMAM&url=http%3A%2F%2Fwww.powerstroke.org%2Fforum%2Fattachments%2F6-4-drivetrain-problems%2F11130d1257385850-weird-shutter-vibration-tsb-09.4.9.pdf&usg=AFQjCNFQ_c8ijOcnKR1EnaO5eI83tHPx_Q&sig2=-JVOZNYqgEhWWOldNcbEgw&bvm=bv.131783435,d.amc[/URL] [/QUOTE]
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