speedometers
 

At what mileage did your Odometer quit? Just trying to figure out the average mileage the gears go south.

106000 miles and mine went kaput.

~99k

69K and 28years.
Plastic, ozone ect.

On my 79, it quit at 110,000 miles or so. It was only 13years old at the time.

100,400 and 16 years old. It was the first thing that broke on the car less than a month after I bought it.

Too many factors to determine an average. Car outside, inside, inside heated, hot climate, cold climate, garage queen, driven a lot, driven a little ....you get the picture

Porchcar Guy, you are correct, lots of variables. I'm just interested in approximate mileage the Odometer gears had on them when it expired and to see if there is mileage range the gears should be replaced before they stop turning.
I had mine replaced at 215K but unsure if this would have been the 2nd time (most likely) and I have a replacement that has 72K on it so I would expect it to go another 20/30 K before it two will have to be replaced? (which is the reason for this exercise)
The more responses I get will help with this inquiry the better the graph will look when shared with the rest of Porsche owners that are in the same boat.

I just replaced mine, 153K on an 87.

120k.

Mine broke at 176k, no idea if this was 1st time or not.

105,XXX - 87 Carrera

Went 160k. 26 years

120k @ 30 years.

About 96K on my 79SC

In my experience the gears don't break from age, they break when you press the reset button; it's a poor design and reset puts too much stress on the gears.

After breaking twice in the first 150k miles, mine has now gone over 200k on the last fix, all because now I NEVER press the reset button.

HTH,
Chuck.H
'89 TurboLookTarga, 370k miles

Don't press the reset while moving, it will break the gear.


R/Dave

While I'm sure that makes matters worse, mine broke twice when fully stopped and during the gentlest of pressing. It's a very poor design that was never addressed by VDO.

I'd also like to fathom the ease of which these break may be the cause for many a 'low mileage' 911 we see for sale :-)

Chuck.H
'89 TurboLookTarga, 370k miles

Having spoken with someone who repairs these (for +30 years) , they swear there's no direct relation between the resetting and the odo failure. Maybe, somehow, they are "linked" when one has a "failing" odo gear and this process stresses an existing marginal odo gear integrity.

Aside from this condition: no relation.

Best,

Doyle

Thanks for your interest dshepp806, has your odometer failed? being an 89 you must have a few miles on it.
If not it would be interesting to know your current mileage (for this study)
I'm just interested in mileage, with this limited sampling, so far it looks like 100K +- / we can expect a gear rebuild/replacement