How to choose replacement parts?
The gears we offer fit several vehicles from Audi to Volvo manufactured from the 70's to the 2000's, equipped with VDO or Motometer instruments.
In most of these vehicles there were more than one, sometimes several gear variations possible, even within the same model year, engine and trim level configurations.
(considering the age of these cars, this can often be due to a number of repairs and part replacements over the years)
So in most of the cases, we highly recommend disassembling the odometer and identifying existing gears, before ordering replacement parts.
Based on your photographs, we can help you identify, sometimes even if the original gears are seemingly broken beyond recognition or even completely missing.
But in below discussion we try to give guidance so you can identify them on your own.
Some of the rare models when you can be 100% sure about compatibility are:
Audi 80 (B3 B4), Audi 100 (C4)
These models are equipped with VDO gear+pod type electromechanic odometers, with a small 15 toothed gear:
It is strongly recommended to also replace the pod gear disc as well, to fix the problem once and forever.
These Audis more often use the 16 toothed small pod, somewhat rarely the 15 toothed pod:
All Chrysler / Dodge vehicles (except Monaco) equipped with VDO electromechanic odometer use a 20 toothed gear with a 16 toothed medium pod:
Volvo 850 equipped with VDO electromechanic odometer (not Yazaki) use a 15 toothed small gear with a 12 toothed small gear pod:
There are at least 6 different systems for mechanic/electromechanic odometers.
If you search for your vehicle in our catalog, you will find all variations that are known to us that might fit your vehicle.
Below we will discuss these, and show some typical configurations.
This system consists of 2 gears:
A larger gear (allso called pod gear) which is molded onto a white plastic disc, which has an excentric pin.
Onto this pin, goes the smaller gear.
Both the overmolded large gear and the small gear were originally made of a soft, rubbery material, which deteriorates over the years and sooner or later will fall apart.
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In these odometers, there are 3 gears that can fail.
First gear is always 12 toothed, molded onto a brass insert which is fit tightly on the 2mm steel shaft of the motor.
Second (black) gear is 48x12 toothed and free running on a 2mm steel shaft.
Third (yellow or amber) gear is also running on a 2mm steel shaft, and can have several tooth counts.
If your gear is broken so badly you can't count its teeth, you can still identify it by counting teeth on the next (meshing) gear:
E.g., if the meshing gear has 48 teeth, you need 48x12 third gear.
All variations can be identified:
- 48 teeth: 48x12 kit
- 47 teeth: 48x13 kit
- 46 teeth: 48x14 kit
- 45 teeth: 48x15 kit
- 44 teeth: 48x16 kit
- 43 teeth: 48x17 kit
- 42 teeth: 48x18 kit
- 41 teeth: 48x19 kit
- 39 teeth: 48x21 kit
In these odometers, there are 3 gears that can fail.
First gear is always 12 toothed, molded onto a brass insert which is fit tightly on the 2mm steel shaft of the motor.
Second gear is larger, 44 or 43 toothed on the outer gear, and is running on a 2mm steel shaft.
Third gear is also running on a 2mm steel shaft, with 38-39-40 toothed outer gear.
If your gear is broken so badly you can't count its teeth, you can still identify it by counting teeth on the next (meshing) gear:
If the meshing gear has 33x26 teeth, you need our 44x17+38x23 gear kit.
If the gear has 28x22 teeth, you need our 43x16+39x28 kit.
If you have any other gear configuration, please contact us so we can help!
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