Speedo/Odometer questions, Gears, lube, and more Options

[bbrock]

So I completed the odometer repair following the tech article on the bird. PIA but it seemed to go well enough. But I have a few questions before I button this thing up.

1. It was recommended that I replace the plastic drive gear while I'm in there as they are prone to failure. But I"m not sure what gear needs replacement and the most likely suspects are metal on mine. Does this not apply to me?
   
   
   
   
   
2. While in there, I freshened the grease on the worm, and other gears with multi-purpose grease. Later, I read that petroleum grease breaks down the plastic gears and is responsible for the failures. Should I clean out the grease and replace with a different lubricant? If so, what?
3. In testing, my odometer advances the mileage when the trip meter reaches 9/10 of a mile. Is there a way to align these so the odometer advances in sync with the trip meter as it rolls over a new mile? My trip meter and odometer never worked since I owned the car so I don't know what is normal and maybe I'm being too picky.
4. This is an idiot question but is there any magic that would whiten the tenth mile wheel short of removing and painting? Dreaming the impossible!

Thanks again for all the great advice from the brain trust.

[burton73]

Hay Brock,

I guess I gave you some miss information on the drive but at least you got your speedo questions answered. My 911 Carrera 86 broke a couple of months ago when I pushed the trip reset.

Have you cleared you the plastic on the face with Novus 1 and 2 polish for plastic or am I wrong one more time and you have glass fronts?

Your doing great on your restoring of you baby.

Bob B

[bbrock]

Hay Brock,

I guess I gave you some miss information on the drive but at least you got your speedo questions answered. My 911 Carrera 86 broke a couple of months ago when I pushed the trip reset.

Have you cleared you the plastic on the face with Novus 1 and 2 polish for plastic or am I wrong one more time and you have glass fronts?

Your doing great on your restoring of you baby.

Bob B

No worries. And I think you helped me out regardless! I had a sneaking suspicion I wasn't finished with this gauge, so chose not to re-crimp the metal bezel. Had you not brought up the gear, I would not have learned about the magnet assembly grease. So there you go!

I think my car was in a transition phase from glass to plastic because my combo and speedo both have glass lenses, but my tach had plastic. I started to polish that one up with Novus but decided to have a local glass shop cut me a new one from glass. They did it on the spot in about 15 minutes. So all glass in the gauges now.

I'm still wondering about the syncing of the trip meter and odometers as the miles advance. When I first tested mine, the odometer was advancing when the trip hit two tenths of a mile but the 10 mile wheel on the odometer was misaligned after the advance. I fiddled with it a bit and really don't know what I did, but now all the odometer wheels stay aligned as miles advance, but they advance when the trip meter hits nine tenths. That's better than 2/10s but it makes me wonder why.