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Yeah--mine is acting up, and they are definitely related to each other. Speedo works fine, but my trip meter will hang up every 100 or so miles, and when reset it works again. The trip meter has got to be connected to the odo, as when one stops working the other does as well, and when the trip is reset and works, they both work.
Very interested if I can do this myself as I saw a metal gear somewhere [maybe 968engineering.com?] that replaces the crappy stock plastic one.
1988 911 3.2 Grey/Sand Cab M491 5 Speed
1992 968 Blk/Blk Coupe 6 speed, LSD, Drilled Airbox [FOR SALE]
1997 993 Silver/Black Coupe 6 Speed [SOLD, missed]
2001 996 Blk/Blk Coupe 6 Speed [Gone, missed occasionally]
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I fixed mine a while back, the gear is very easy to replace and will correct both the odometer and the trip odometer. However, the gear is not the only thing that can cause the problem. There is a small electronic backplane as well as a very small electric motor which drives the gear. Both are potential causes of the failure as well. Although the gear is the easiest and cheapest thing to try first.
If it is not the gear, you will likely have to ship it off to Palo Alto or Speedometer Plus to get it fixed, either spot will run you between $125 to $200 for the repair and shipping.
Also, for those do it yourselfers.....the 968 Speedometer guage is NOT the same as the 944Turbo or S2 (tyically quoted as interchangeable, however there are different mechanicals inside), so if you are looking for a replacement off eBay or elsewhere, check down to the part number.
'13 Lexus GX
'04 BMW 525
'92 968 Cab Black/Grey
Corvette Z06 - Dedicated track car (Sold)
'94 968 Cab-Guards Red (Sold)
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James,
I've had my car for a year now and have always had intermittant odometer/trip meter issues. I can't prove this, but I think they are electrically connected to each other somehow but unrelated to the speedomoter just as you suspect. I haven't check the wiring schematics nor had opportunity to dismantle the instrument cluster to troubleshoot. My symptoms are much the same as yours where operation is hit or miss. I have noticed that the reset button sometimes works and sometimes doesn't too (also electronic, as the button push send some kind of signal to reset the numbers to 000). Other troubleshooting methods include a sharp thwack either on top of the dash or under the dash directly below the steering wheel and sometimes that charms it back into working. It also seems that more frequent driving will yield more consistent operation. I am all but convinced that this is electrical and there are a number of discussions about improved guage operation and the like after cleaning up ground points. I also have the wacky temp guage that will right itself after a finger flick on the plastic dash screen just on top of the temp guage. Bottom line is that I'm hoping cleaning grounds and checking solder joints will fix all these goofing dash/instrument problems. After replacing my stereo head unit, not only did my clock light start working (which had never before), but I could swear the dash lights got a little brighter. All roads lead to poor connections!
- Darryl
1992 Slate Gray Coupe over Carrera Gray Full Leather interior....1 of 1
2006 Cayenne S Icelandic Silver Titanium Edition
2006 Cayman S Seal Gray over Black
![[Image: 968-IC.jpg]](http://members.aol.com/kenrclark/968-IC.jpg)
