Sounds to me like a slow motor. There is a list member who is also on a The Samba who rebuilds them. Check the classifieds . 

                                   Stacy

Sent from my iPhone

> On Oct 20, 2015, at 12:56 PM, Neil2 <vidublu@GMAIL.COM> wrote:
> 
> I opened up the door and can't seem to determine the problem.  It seems
> while looking toward the door from the inside the cable runs out of the
> white opaque tube? up to the window bottom edge, turns 90d toward the
> locking mechy, another 90d downward to the bottom of the door then does
> another 90d turn toward the front of the door.  It seems the cable is
> unsheathed on the vertical runs.  I can see with a tiny mirror the threads?
> on the motor housing where the plastic tube? connects and it seems to
> retract/extend when I operate the buttons but I can't really tell just how
> the whole thing is supposed to work.  The window produces little to no
> abnormal noise now and works well, just slowly.
> 
> And, the DS window now has an odd, very slight clunk in at least one spot
> in the movement up/down.
> 
> Can anyone describe how the assembly is supposed to operate.  My FatMat is
> a little troublesome but I've removed most of it where it impairs vision.
> 
> Please/thanks!
> 
>> On Wed, Oct 14, 2015 at 4:26 PM, Dan N <dn92610@gmail.com> wrote:
>> 
>> hi Neil,
>> 
>> I took out the whole power window assembly recently for repair..if you take
>> them out, consider open up the motor to clean and lube it.
>> 
>> The bottom of the raiser has a plastic guide attached to the metal vertical
>> rail via a plastic pin. You may want to replace that plastic pin with small
>> screw and bolt. The pin on mine was broken and the cable jumped off the
>> track.. Time to remove, repair, clean, lube and reassembly is about 4
>> hours.... yeah I am slow :-)
> 
> 
> 
> --
> Neil2
> '82 Diesel Westfalia (Ducky)
> '86 Vanagon/Westfalia Wannabe (SaVannah)
> '08 170" 2500 Mega Roof Dodge Sprinter (Moby)
> '90 Westfalia Subagon
> Fulltiming since August 2008
> Nunquam Pendite Divendium