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Old 11-05-2018, 07:21 PM   #1
Peter frost
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Default Highway transmission noise concern

Need some help diagnosing a odd noise vibration.
My 1967 1100b 304 4 speed has an odd vibration between 50-60 mph
When I reach 60 the vibration goes away.
Guessing it seems transmission in origin.
Has anyone experienced this?
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Old 11-05-2018, 07:44 PM   #2
Scoutboy74
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Default Re: Highway transmission noise concern

It could be other things too, like u-joints or the drive shaft itself. Is this a 4x4 or 4x2? What happens when you push in the clutch while the vibration is occurring or take it out of gear? Can you shut the engine off for a dead quiet coast during the vibration? Not recommended if you have power steering. Have you gotten underneath and just started shaking the living dog piss out of shafts and leaf spring hangers to check for excess play/looseness?
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Old 11-07-2018, 04:53 AM   #3
Peter frost
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Default Re: Highway transmission noise concern

Vibration stops when clutch is disengaged.
Itís a 4x4
Iíll get under it and start shaking the shaft and see if thereís play
If thatís the case... whatís my options?
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Old 11-07-2018, 05:59 AM   #4
Scoutboy74
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Default Re: Highway transmission noise concern

The best case scenario would be sloppy u-joints as those are easy and inexpensive to replace. If they've been in there since Moses was in diapers and haven't been greased properly, they're probably not long for this world anyway. That may or may not be the cause of your vibration, but if they need replacing...
Another thing you can try is to remove the rear drive shaft and go for a spin on front axle power. See if that makes any difference. Have you checked the lube levels in the transfer case and transmission? Have they been changed since Cain slew Abel? Sort through the simple and cheap possibilities first.
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Favorite hobby...Driving Salma Hayek in my Scout

Coal Trickle - '99 Dodge Ram 2500 Q-Cab SWB 4x4 - 5.9L 24V CTD/NV4500
Hooty - '74 SII - 392/TF727/D20/3.73 D44's/Spartan FA/Krac-lok RA/RC 4" SUA/34x10.5 TSLs/33g Fuel/HFT 8k winch
Mongo - '71 1210 Std Cab 2WD - 345/TF727/RA17 D60 4.10 Trac-lok - "Mongo love candy! Duh, huh, huh!"
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