Hypoid gear

Hypoid gear is among the most important innovations in the automotive industry in the twentieth century. On February 8, 1926 the Packard Car Co. has begun production of its model Six third series, in which for the first time in the world used hypoid final drive. Introducing novelty from Packard would not have been possible […]

Hypoid gear is among the most important innovations in the automotive industry in the twentieth century. On February 8, 1926 the Packard Car Co. has begun production of its model Six third series, in which for the first time in the world used hypoid final drive. Introducing novelty from Packard would not have been possible without the development and improving of the company Gleason Works, Rochester, created lathes for cutting hypoid gears. Thanks to this cooperation eliminating howling gears in cars. Today this unusual sound can only be heard when driving a car in reverse on manual gearbox, where as before are used gears with straight teeth, and in some racing gearboxes.

In hypoid gear, unlike other bevel gears, the axes of the ring and pinion do not intersect in one plane and not fits geometrically.

Due to this form of extended contact area of the teeth of the two wheels, it is possible to make larger and stronger, which allows the transmission of more force in gear. The transition the axis of the pinion below that of ring allows to lay drive shaft down, to lower the center of gravity and make the floor in the car equal. Hypoid gear final drive, as already mentioned is quiet and has a high efficiency and therefore remains irreplaceable already 90 years.

Speed sensors

Because of some confusion when and what sensors speedometer mounted over the years and their compatibility I will try to explain.   Sensor on the left is mounted to sept.’87 on E30, E23, E24, E28. It has a white version too. To the right is a sensor mounted after sept.’87 of E30, E34 (models to […]

Because of some confusion when and what sensors speedometer mounted over the years and their compatibility I will try to explain.

Sensor on the left is mounted to sept.’87 on E30, E23, E24, E28. It has a white version too.

To the right is a sensor mounted after sept.’87 of E30, E34 (models to 525TDS), last E24

As can be seen in the next picture, irreplaceable:

The next picture is E30 to sept.’87: №62161369906

Here E30 after sept.’87: №62168355008

The same sensor on E34:

On the next picture are sensors that have the same connectors:

To the right of the photo are the sensors of the above photos that are installed after sept.’87 on E30, E34 (models 518i, 520i, 524td 525td and 525TDS), the sensor on the left with BMW № 62168357020, which is painted in blue for all E36 and E31, and this in white for visco LSD of E30, which is exactly the same, but with white plastic.

Here it is of E36:

Because of the difference in length, however, any of E34 sensors, may be replaced by a blue from E36, but not vice versa. This is because of structural differences in the rear cover and impulse wheel respectively:

Remained two sensors that are mounted on E34 (525i, 530i, 535i and M5) and E32 to july’90 №62161379874:

after july’90 №62161390063:

fully compatible: