Vibrations = Egged Shaped Rims? - Page 3 - Ford Powerstroke Diesel Forum
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post #21 of 24 Old 01-11-2017, 10:12 AM Thread Starter
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ok,
new u-joints/bearing all around, 24 hour service!
he straightened out a slight bend......re-balanced.
said it went from a '30' to a '5'.........what ever the measurement unit is/was I donnu....
that 'dampner/balancer-thingy' really accentuates any such issues.
he said he normally cuts it off, but not to do it as not sure the effect on overall drivetrain balance.

short local road test seems smoother,
roads so rough around here, lot's of bouncing,
hard to say till I get on the road next week.
hopefully the vibe-harmonic above 60 IS better.

also rotating tires later this afternoon,
about 5kmiles on new rims/tires/shocks etc.
they are due.


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post #22 of 24 Old 01-11-2017, 11:07 AM
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If the driveshaft is just even a hair off then it can cause big issues.

Straightened and balanced will make a big difference no matter what. Get on a smooth road and check back
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Last edited by White95f250; 01-11-2017 at 11:23 AM.
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post #23 of 24 Old 01-13-2017, 05:12 AM Thread Starter
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will do after the rains stop...

i have a theory that if nothing has changed at the problem speeds, then it has to be rear wheel bearings.......rear diff.

it's definitely smoother at lower speeds.....hopefully better at 62mph!

the SRW axle configured with:
dually adapters,
dually spacers,
and 2 wheels seems rather 'much' on the designed bearings OEM. IMHO.

it's like increasing the offset in a major way, that's definitely a stress point/failure weakness on other trucks from my interwebz study

the lateral bending torque on the bearings with all that mass/at such a distance away from the hub.
must be incredible compared to running a single tire close to the hub?
esp. if you run on just the outside tire in un-even or offroad.


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Last edited by ptp; 01-13-2017 at 03:14 PM.
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post #24 of 24 Old 01-28-2017, 06:48 PM Thread Starter
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CA JUST about worse roads in nation

on the only 4 miles of good road in 650, seems ok...

but get onto the rippled tarmac everywhere else hwy 247/ hwy 395 AND it's hit or miss...
Why are California's roads so bad? - LA Times

http://reason.org/files/21st_annual_highway_report.pdf

by going stiffer from code V to code X probably made it worse when it hit's the system harmonic........

will be looking into rear wheel bearings soon just to service diff. et. al.

but on the bad roads, it really bounces/vibrates into the steering wheel and front bumper and nothing up front is old.


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