GT4 speedometer

How does one get into this speedo?

It looks like the four socket head screws on the outside plate and then...?
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pull out the panel toward the steering wheel, reach to the back of the speedometer and unscrew 1 (or 2) retainer nuts that hold a bracket which puts tension on the back of the panel to secure the speedo against the panel, then the panel comes out toward the front.

This project is really the pits. I did it many times and hated every one of them. It is tight, hard to access, terrible clearance, and you might break the clock while you are at it.

 

Thank you for the heads up.

Will jump in tomorrow.

 

I was able to loosen the retainer nuts, but not remove them. The speedo has maybe 2" of slop now. Since I am working blind......

The bracket that puts tension is loose, but still connected to the speedo. The nuts unscrew to a point then stop. Are they supposed to come all the way off?

 

I've not removed that GT4 speedo but have removed many such gauge brackets. Most have had knurled nuts which completely unscrew from the gauge although a few had brackets with slots rather than holes so the would slip off sideways when loosened. Test for this bracket configuration before going on.

The worse case is a stud extending from the gauge which has a bad end thread or glyptol applied, and excessive force on the nut loosens the stud inside the gauge. When this happens needle nose pliers must be clamped onto the stud to keep it from turning...avoid this situation if possible.

Best to try running the the nut back near where it started, applying oil to the tip of your finger and transfer it to threads at the end of the stud, then backing the nut out again. It may take several attempts to get enough oil onto the threads but this should work.

Remove battery power to the car before working behind the dash as that bracket can come in contact with a nightmare when it drops free.

 

Finally got the knurled nuts off!....Damn.

Both studs had a burr on the end of them. Looks like somebody cut off the ends of the studs.

Pretty strange as it looked like I was the first one to remove the speedo.

Now......is there a way to remove the glass from the speedometer so that I can fix the gasket that has come loose? Looks like the chrome trim is "swedged" onto the plastic housing.

Palo Alto Speedo said they can do it for 100 bucks.

 

Recently, someone dissembled a 308 speedometer by making a tool from nippers to remove the swedged decorative ring which holds the glass onto the gauge, and posted several pictures including this one.
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