There are 3 different sizes for the odometer lead gear.
The best way to check the gear is to make sure it is tight on the shaft, it should not spin.
All you need to do is measure the overall thickness before you order a new gear.
The 3 sizes are:
1. ~3.2mm
2. ~4.8mm
3. ~6.4mm Learn More
This is a set of replacement gears for both the LEFT and RIGHT Convertible Top Drive Mechanism Transmissions.
The angle of the teeth are from left to right on the LEFT gear and right to left on the RIGHT gear.
OE Assmbly # Left: 986 561 179 02, 986 561 179 03, 987 561 178 00, 987 561 178 01, 987 561 178 02, 987 561 178 03
Right: 986 561 180 02, 986 561 180 03, 987 561 180 00, 987 561 180 01, 987 561 180 02, 987 561 180 03
Learn More
This is a replacement gear for the LEFT Convertible Top Drive Mechanism Transmission.
The angle of the teeth are from left to right.
OE Assembly # 986 561 179 02, 986 561 179 03, 987 561 178 00, 987 561 178 01, 987 561 178 02, 987 561 178 03 Learn More
This is a replacement gear for the RIGHT Convertible Top Drive Mechanism Transmission.
The angle of the teeth are from right to left.
OE Assembly # 986 561 180 02, 986 561 180 03, 987 561 180 00, 987 561 180 01, 987 561 180 02, 987 561 180 03 Learn More
M17 Odometer Gear for mechanical speedometers
Generally the most common gear that we have seen has been a 17 tooth gear.
Please always check the tooth count on the old gear before you place an order.
If you do have a different tooth count please search under mechanical speedometers. Learn More
Odometer Gear 20x30
This gear is for all 911 Porsche's with US- specifications from 1976 - 1989.
It is a double gear with 20 teeth on the outside and 30 teeth on the smaller inner gear. Learn More
Il existe plusieurs options de nombre de dents qui peuvent être installées dans cet odomètre
Vous devez compter le nombre de dents du vieux pignon avant de passer votre commande.
Le pignon extérieur aura toujours 20 dents, tandis que le petit pignon intérieur peut avoir entre 21 et 32 dents.
Si vous ne pouvez plus compter les dents du pignon principal, comptez alors les dents du pignon suivant avec lequel il engrène.
Le nombre de dents devrait être compris entre 38 et 49.
49: 20x21, 48: 20x22, 47: 20x23, 41: 20x29, 40: 20x30, 38: 20x32 Learn More
25 tooth odometer gear. (E25) The diameter of this gear is 10.70mm or .421"
This gear rides on a large pod gear
There are 2 gears that operate the odometer.
1. 25 tooth odometer gear
2. 15 tooth large pod gear
We always recommend to replace both gears at the same time. Learn More
Odometer gears for Porsche with mechanical VDO Speedometers / Odometers. ( cable driven)
Tooth count option between 10 and 25 teeth
Please verify tooth count on the original gear before you order a new one.
We also recommend to inspect the lead gear, make sure it is tight on the shaft. Learn More