Thanks Dan, Dan, and Stuart!

I will first lower pressure by 10%.  Currently, pressures are at 50 psi
rears and 40 psi fronts.

If I isolate the root cause to tires, then I will be replacing these with
new.

Skip

On Fri, Jun 18, 2021 at 9:01 AM Dan N <dn92610@gmail.com> wrote:

> Also, for testing purposes, I'd suggest lowering the tire pressure by 10%
> to see if there's any difference. BFG tires have stiff sidewalls (stiffer
> than others) and when they get old they flex less. I can feel the
> difference when I switch from BFG to General Grabber AT.
>
> On Fri, Jun 18, 2021 at 6:40 AM Dan N <dn92610@gmail.com> wrote:
>
>> Yes, it could be the tire's temperature related issue. I have an ML430
>> SUV that gives small vibrations or harsh rides when the tires are cold...
>> After about 10 miles, it's smooth as nothing ever happened... and this
>> happens with new tires too. The sensation is similar to unbalanced tires or
>> flat spots.
>>
>> On Fri, Jun 18, 2021 at 6:27 AM Skip Laubach <skiplaubach@gmail.com>
>> wrote:
>>
>>> Thanks for the tire ideas!  Trying to narrow things down. Tires are 14”
>>> BFG’s, maybe 8 years old, 30,000 miles.
>>>
>>> I’ll take a close look at the tires.
>>>
>>> Skip
>>>
>>> Sent from my iPhone
>>>
>>> > On Jun 18, 2021, at 7:39 AM, Dan Lamb <vanagongramps@gmail.com> wrote:
>>> >
>>> > Maybe tire has flat spot til warms up?
>>> >
>>> > Sent from my iPhone
>>> >
>>> >> On Jun 17, 2021, at 9:37 PM, Dan N <dn92610@gmail.com> wrote:
>>> >>
>>> >> Engine and transmission mounts?
>>> >>
>>> >>>> On Thu, Jun 17, 2021 at 6:55 PM Skip Laubach <skiplaubach@gmail.com>
>>> wrote:
>>> >>>
>>> >>> ‘84 Westy, new 944(?) CV’s.
>>> >>>
>>> >>> I have been using the Van as a daily driver for the last week (25
>>> min/15
>>> >>> mile commute).  During the first 5 miles a noticeable bump, bump
>>> sound
>>> >>> eminates from the rear of the vehicle. Not sure if it’s the CV’s, an
>>> axle
>>> >>> bearing, or otherwise. Only occurs when the van is moving so don’t
>>> believe
>>> >>> it’s the engine, but maybe? The bump, bump sound kind of dissipates
>>> after a
>>> >>> bit of driving. Thought maybe others have experienced same?  Please
>>> advice
>>> >>> and thanks!  Long time subscriber/infrequent contributor (but that
>>> may
>>> >>> change).
>>> >>>
>>> >>> Skip (northern Illinois)
>>> >>>
>>> >>> Sent from my iPhone
>>>
>>