1997 Weird Noise Behind Dash

Just bought a 1997 Tacoma with 138k miles, 5 speed manual, and a ton of body damage. I am getting a weird noise behind the dash starting at 25 mph. It seems to only happen first drive of the day, and it has been below freezing. Seems worse inside, doesn't get worse when I open the window. Also, the speedometer seems to jump around a bit when its happening. Check out the video: https://youtu.be/ICB2Kz0H6SM

 

My 95.5 has the exact same noise. I think speedo cable is in need of lube. Just haven't had the nerve to pull the cluster.

 

That is speedo cable or bearing where it rotates in the cluster. Early models have mechanical speedo (powered by cable), while later models have electronic (via the sensor in T-case).

Now removing the cluster is straight forward up to the point 14 (see the instruction attached) but the tricky part is to disconnect the cable. You can't pull the cluster out because it is held by the speedo cable, and you have very little access to unscrew the speedo cable because you can't pull the panel out. The good thing is that the cable can be unscrewed by hand so it is possible.

 

this is not the current noise I am experiencing that popped up about a month ago, first discouraging noise i have ever experienced!!!
it is on the passenger side behind the glovebox
happens only when accelerating, stops when coasting
so far only happens after the A/C has been on the freeway (don't think it makes noise with A/C on, haven't noticed yet)
turn A/C off, leave fan on, get off the freeway, stop at light. Cruising side streets noisy rattle comes on when accelerating, goes away when coasting
should I try if it only happens in certain gears? I have MT

... when it has been cooler outsie here I test drive with no A/C on and no noise happens
trying to isolate it to something in the A/C system
perhaps silver tubes that come into the cab?

 

I have that same noise. Seems to only happen when my AC is on or that’s when I notice it, passenger side behind glove box. Hasn’t bothered me that much yet to look into it.

 

have you had the problem long?
this just started happening when it warmed up outside and had to turn A/C on sometime in April
it has not started happening WHILE the A/C is running (as far as I can tell)

 

I think ever since I had my truck which is almost a year now? Maybe it’s a “normal” thing with our trucks?

Keep in mind this is not my daily and I drive it once a week to keep the battery going unless I’m taking it on a trip.

 

don't know if this is 'normal' as nobody else has chirped in yet with similar issue/symptoms
i sure hope its not normal at this age, really sounds like something is loose or vibrating back under there
I could eliminate the 'noise' by NEVER turning the A/C on again but dammit it gets nasty humid here,(not as bad as in the south,though) I can drive with the windows down with the heat and breeze but I am very sensitive to humidity lol

 

It must have been the speedo cable or bearing, because it make a horrible sound one cold morning this winter and now I dont have a speedo or odometer.

Any ideas of fixing it? new cluster? or is it possible to replace the bearing or cable? I just want cruise control back