On the earlier vans they are also shaped differently.

Jim

On Nov 19, 2012, at 8:24 AM, Larry Alofs <lalofs@GMAIL.COM> wrote:

> Speaking of heater controls and little known features.  Two of the heater
> control levers have bumps on the sides of the 'knobs".
>  This can help you find the right one while keeping your eyes on the road
> or when it's dark.  They are more prominent on the later model vans.  I
> didn't notice them until I got my '91, tho they were there on two earlier
> vans.
>  Maybe everyone else already knew this...
>
> Larry A.
>
>
> On Mon, Nov 19, 2012 at 7:43 AM, Mike S <mikes@flatsurface.com> wrote:
>
>> On 11/18/2012 10:27 PM, MICHAEL H wrote:
>>
>>> Harry - pneumatic tires ARE shock absorbers at a basic, technical level
>>> ...
>>>
>>
>> Well, no. They're more like springs, any ability tires have to absorb
>> energy is minimal compared to an actual shock absorber, and is something
>> tire makers try to keep to a minimum for energy efficiency. Shock
>> absorbers are dampeners, made to absorb energy from movement.
>>