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Re: 2 piece drive shaft to 1
Andy one thing to check would be your pinion, driveshaft and engine angles. I had started changing my rear suspension along with lowering it and the engine install and I had a bad pinion angle. I didn't feel bad or anything but I could hear a harmonic. I made sure my engine and transmission was correct to where I wanted it and finished my lowering and suspension upgrades then cut my perches off and fixed it. That noise went away. You might want to check that in case the shop did not.
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Dave
1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap
1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?)
"A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome".
"If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"
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