[rkeysor]

When the speedometer on my '92 coupe lost its odometer and trip recording functions, I checked out our search function and also visited Clark's Garage, Odometer Gears, and KLA Industries, which offers a detailed photo series on removing the instrument panel, steering wheel, etc. Fortunately I held off on buying the 15-tooth gear most sources said the 968 requires. To my dismay, I found my speedometer is unlike those shown in the repair sites (granted they were probably 944s, but my impression was the 968 was similar and used the same repair procedure). My speedo has a circuit board on the back and a clear plastic case for the gears. I quickly abandoned efforts to open it because the gear package visible inside didn't look like those shown on the Web repair sights. I've shipped it off to North Hollywood Speedometer. Anyone else have a similar experience?

Partial Post: Please Login or Register to read the full post.

[wiseman]

Nope. I have a 92 Cab and did the speedo repair myself. Pretty straighforward. I thought there was a picture thread on this site for the repair? Whatever one I used was pretty accurate.

Partial Post: Please Login or Register to read the full post.

[banditsc]

It's the same speedo as a 944. You need to gently and carefully pull the needle off the speedo, then undo the two little screws to pull the face off. Then under there you will find four screws that allows the plastic case to come off. Once you have it out you can count the teeth to verify which one you need.

This may help you some, just fast forward a little thru it till you get tot he speedo. http://www.dwaynesgarage.norcal928.org/198...20Procedure.htm

Partial Post: Please Login or Register to read the full post.

[Darryl]

Ah, "been there, done that". I have successfully repaired both 944 and 968 speedos and have had to send one out that turned out not to be the (somewhat) simple gear replacement. The 968 speedo is not the same as the 944. Perhaps it is the same as the S2 but it is not like the 85.5 2nd gen 944. That generation has a worm gear as many of the online photos show and bandits link for the 928 cluster from the post above. The 968 has an integrated circuit board and stepper motor much like rkeysor has discovered. Our beloved instrument cluster shares speedo characteristics with the 964. Search around on the web for 964 odometer fixes and that's what you're up against. Now, that being said, the removal and actual physical stuff is indeed very similar to 944 procedures but not the guts. I will dig up some photos of each and do a side by side.

- Darryl

Partial Post: Please Login or Register to read the full post.

[rkeysor]

I think Darryl has got it right. I don't know how my speedo disassembles--I removed everything but the two motor screws--but I recognized by then that it didn't use the same gears shown in the repair information I located. I had no idea that it shared the 964 design. Remember, the structure of my motor is a clear plastic,not white . In any case, I will be paying to have the repair made. I did choose to remove the steering wheel and air bag to get at the speedo, etc., and the instructions given for the removal of the gauges was exactly as described elsewhere. I anticipate putting the assembly back in the dash, sans speedo, and putting the steering wheel back on so I can drive the car. I won't put the air bag back in until I can restore the speedo.

Partial Post: Please Login or Register to read the full post.

[flash]

the clark's write up works as i remember, but was lacking pics which are here:

http://www.968forums.com/index.php?showtop...amp;hl=odometer

Partial Post: Please Login or Register to read the full post.

[White968]

Wow!! This site just amazes me, my odometer\trip failed a week ago. Now I have information on how to fix the problem. this is why this is the greatest 968 site in the world.

Partial Post: Please Login or Register to read the full post.

[jaap]

I also completed this repair a few weeks back using a gear from odometergears. You defenitaly do not have to remove the needle or face plate. Once you remove the stepper motor (two screws) you can just replace the little gear. I think that without removing the stepper motor the small gear is difficult to identify.

Jaap

Partial Post: Please Login or Register to read the full post.

[rhudeboye]

Fixed my speedo within the first year of ownership. The write up worked perfectly.

Partial Post: Please Login or Register to read the full post.

[wiseman]

Make sure when you get the thing apart, you blow out the whole mechanism before installoing the new gear. Very small bits of the old gear could still be hiding in there and get caught in the teeth once you get ita ll back together. A good tip from Odometergears. Good guy.

Partial Post: Please Login or Register to read the full post.

[ds968]

My turn ! Arrghhh. It's the second 968 this time ; the first 968's odo broke and was fixed nearly ten years ago . So after driving back from SoCal yesterday, I stopped at a gas station near my house to fill it up, zeroed out the trip odo , took off for the 3 mile trip home and I must have driven so fast it never got a chance to record that distance, lol :-) !, Crap, another broken odo and the pita of removing the VDO to get it fixed.

Partial Post: Please Login or Register to read the full post.

[flash]

yup - contrary to popular misconception, the 968 is not immune to this 944 problem, regardless of whether you are diligent about not resetting it while you are moving or not. it may reduce the failure rate, but it does not eliminate it, as they still use the same weak gear. it's only the reset mechanism itself that got changed from a mechanical direct release, to an electronically controlled release of THE SAME MECHANISM.



the problem is that the material is weak, and when the gears are put back into operation, they don't always mesh well. this happens whether mechanically or electrically released.



had it have happened here, we could have fixed it. i usually have a gear or two around. figures it would wait until you were home.

Partial Post: Please Login or Register to read the full post.

[94SilverCab]

I was very careful not to reset while moving, got more than 80k miles before it broke, but they all will eventually...



Jay

Partial Post: Please Login or Register to read the full post.

[ds968]

When my first odo gear broke I blamed it on possibly zeroing it out while moving at some point or another ( even though I'm not so sure I did that..) but since then I made a point to only reset it when the car is parked..as was the case yesterday. Evidently when those gears are ready to go, it makes no difference whatsoever .

Partial Post: Please Login or Register to read the full post.

[Rap]

Boy, learn something new everyday. Hope I remember this! lol

Partial Post: Please Login or Register to read the full post.

[WJH]

Mine broke right after I got the car. I got the gear and replaced it. I have now repaired two 944s and one 968, I think I see a pattern. <img src="/forum/images/smilies/968/biggrin.png" class="smilie" alt="" />



I never reset the trip odometer. I don't need it that bad. <img src="/forum/images/smilies/968/tongue.png" class="smilie" alt="" />

Partial Post: Please Login or Register to read the full post.

[ds968]

No one actually NEEDS the trip odometer, right ? I can't imagine what purpose its serves other than a minor convenience so you don't have to subtract the mileage in your head, or if you want to measure distances in less than 1 mile increments for whatever purpose..

So in retrospect maybe if I left it alone this would not have happened, but no guarantee there either - I think when these gears are ready to give up, trip odometer or not, mere driving will trigger their failure..

Partial Post: Please Login or Register to read the full post.

[Rap]

If the engineers at Porsche put this here it must have a legitimate purpose. Don't overlook Teutonic efficiency and thought process.

Partial Post: Please Login or Register to read the full post.

[ds968]

too bad the tool bar does not have a sarcasm font you could have used for that statement <img src="/forum/images/smilies/968/tongue.png" class="smilie" alt="" />

Partial Post: Please Login or Register to read the full post.

[Rap]

Oh you devil you! Lol

Partial Post: Please Login or Register to read the full post.