Driveline? noise after upshift


Jhummel73

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Have a "marbles in can" rattle (rattle is the best word I can find to use) after upshifting to next gear. Noise tapers off and disappears as rpms increase. Noticeable at all shifts. Kind of like a "lugging" sound. Recently replaced clutch and this noise which used to barely be there is now much worse and super annoying. Thought it might be ujoints or slip yolk but I replaced ujoints and lubed slip joint. There arent any loose exhaust shields or underframe parts. Has 154,000 miles. Seems to originate under vehicle or near transmission.
 


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19Walt93

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Jhummel73

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Yep, I tried that, solid sounding. Also, after the clutch replacement, I made sure both of the driveshafts went back on like they came off. I think in my many experiences of driving stickshifts, I have heard similar sounds when shifting too early, a gravely rattling until the engine picks up some more rpms, but this happens even if I stretch out the shift points.
 

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rusty ol ranger

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Input bearing?
 

PetroleumJunkie412

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What engine is in it?
 

franklin2

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Do you think it's spark knock or pinging in the engine?
 

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Was curious if it was a 3.0. They have to be driven at high rpm. He may be expecting torque where there is none lol.
 

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It might be helpful if we knew the engine size...

You sure you got a good seal on the exhaust... maybe when the engine is torqueing up it creates a leak.

I would tune into the noise and be really sensitive to any vibration that might be created along with the sound. Might help in narrowing down the origin.
 

Jhummel73

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It is a 4.0. Everything was fine until I replaced the clutch, slave, pilot bearing, flywheel, and throw out bearing. I rechecked the manifold to header pipe bolts and they are tight. This is so baffling. No it isn't pinging or spark knock. The engine purrs like a cat when idling, so quiet, only faint clicking from the valve train. Run synthetic oil. I am starting to wonder if there is some mismatch in the balance from the flywheel on back. When I pulled everything apart I noticed all rotating parts had a small green dot, even the flywheel, however I couldnt quite make sense of those green dots. And the new fly didn't have any marks on it, and the driveshafts I marked myself to get them back on right. Maybe this is the straw which breaks the camels back? Time for a new truck?
 

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Be very careful running synthetic in an ohv. Bad stuff can happen from a lack of zinc. Valvoline racing synthetic and a few others are OK. All Mobil products are banished from my shop. Mobil kills pushrod engines.

This is my old cam vs the new stock replacement. Granted, 280k MI, but I blame Mobil 1 and a lack of zddp for some of it.

_20200402_081449.JPG




This is quickly turning into @Shran, @Dirtman, and @adsm08 territory. I am NOT a transmission guy.
 

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Be very careful running synthetic in an ohv. Bad stuff can happen from a lack of zinc. Valvoline racing synthetic and a few others are OK. All Mobil products are banished from my shop. Mobil kills pushrod engines.

This is my old cam vs the new stock replacement. Granted, 280k MI, but I blame Mobil 1 and a lack of zddp for some of it.

View attachment 39487



This is quickly turning into @Shran, @Dirtman, and @adsm08 territory. I am NOT a transmission guy.
No idea. Any time you have moving parts in contact with each other there is a potential for noise. Manual transmissions fit that bill.

As for ZDDP, I run diesel oil.
 

Shran

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4x4? Manual tcase? One of mine rattles at certain rpms because one of the plastic bushings on the tcase shifter is missing.
 

PetroleumJunkie412

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4x4? Manual tcase? One of mine rattles at certain rpms because one of the plastic bushings on the tcase shifter is missing.
??
 

Jhummel73

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Well some followup is due here. I finally found that the noise was coming from the transmission. Now here's the dumb part...after my clutch replacement and hurry to get everything back together, I found out I didnt tighten all four screws for the plastic cover plate which covers the hole where the shifter comes through. After tightening ALL four screws, wow, no more noise! At least I can't hear it! Back to how it used to be!!

:tease:
 


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