Date: Wed, 23 Jun 1999 07:27:50 GMT
From: Mats =?iso-8859-1?Q?Bj=F6rklund?= <>
Subject: Re: odometer sticking

It's most probably due to a cracked gear in the odometer. This is problem typical of the VDOs in old SAABs. The gear is located on the same axle as the 0-9 discs that show the mileage and is easy to replace without breaking the whole mechanism into pieces. The cracked gear becomes loose and slides back and forth on the axle (causing the odometer to stop at times) and might eventually fall off. The gear usually gets cracked due to some other strain in the mechanism, and will most probably crack again if the rest of the mechanism is left unchecked. Usually it is enough to carefully clean, inspect (possibly taking the whole mechanism into pieces if replacing other worn parts) and lubricate the mechanism when replacing the cracked gear. It's possible to fix the cracked gear if you can't get hold of a replacement gear (a new part is to prefer, it probably lasts longer). Clean the gear from any grease with some detergent (carefully open the crack by pushing a toothpick in the axle hole). Carefully drill the axle hole slightly bigger (causes less strain on the gear when it is pushed back on the axle). Drill the hole so big that there is no or almost no gap in the crack when the gear is pushed on the axle, but so small that the gear fits exactly to the axle. Glue the crack in the gear using 10sec. cynoacrylate glue (or similar) (use a toothpick to open the crack) and clean possible glue stains from the teeth and axle hole of the gear. Make a few scratches on the cleaned axle where the gear should be and glue the gear to the axle (I used 10sec. cynoacrylate GEL glue for this, so there was no time for adjustments but the result was good.) Or leave it to the professionals (might be expensive) if it sounds too tricky... A professional fix of the odometer might be more expensive than a replacement from the scrapyard... and if you decide to buy a used meter be sure to check that the gear ratio is the same, and that the gear mentioned above isn't cracked already. Hope this helps... -Mats- danny morrow danny morrow wrote: > > ive got a sticky situation > the trip odometer seems to be sticking in my 88 SPG. it rolls for a > while, but then stops. i wouldnt worry, except that i like my trip > milage (to figure out gas milage) and that the real odometer doesnt move > while the trip is stuck. > any ideas? > or, maybe i can sell someone an 88 SPG with 120K in, lets say, 20 years! > > danny

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