Re: What is this "thud" after starting
> That sounds like something to check into. It is always just a couple of
> seconds after starting.
> Do you think it would do that in any position on the heater control, or
> would there be a position that would cancel it out?
> "Marlin Singer" <marlin.singer@verizon.SPAMDAM.net> wrote in message
>> Jesse wrote:
>>> Virtually every time I start my `04 Ranger (4.0 Auto) I hear, and feel a
>>> thud coming from the engine\transmission area, as best I can tell from
>>> sitting in the drivers seat.
>>> Sounds like a stuck brake caliper when it releases.
>>> I am sure it is not the A\C clutch, the sound is too loud for that.
>>> Can happen on completely level ground with no contact with the break
>>> pedal, no application or release of the parking brake. So am sure it is
>>> not in the wheel assembly\suspension.
>>> Just in here reading post and came up with this puzzle, will pay more
>>> attention to it in the coming days and post anything I find.
>>> Any clues?
>> I would almost bet it is the blend door for the AC/heat. Just about every
>> truck I have owned will make this noise. When shutdown, it seems the door
>> opens and when started and the vacuum builds, the door slams shut. Making
>> the thump you hear.
Not sure, you might try making sure everything is off before you shut
down, and if you park on a slope where you are nose up, you might try
nose down. I have found it to be no big deal, just quirk.