Reverse gears - (lime green) located in the differential half of the case, are a set of 3 gears (the extra gear is required to reverse the motion of the mainshaft). Power is transferred from the mainshaft to the pinion shaft via the gearing and this collection of gears and other components is called the gear stack.ġ2.
The mainshaft (red) has 4 gears (1/2 of the pairs) and the other 4 are part of the pinion shaft (brown) which is located below the mainshaft. The gear ratio (r) you hear about is the ratio of the number of teeth between two gears (bottom:top) for any set and expressed as ratio:1. There are 8 forward gears paired into sets of two. The red and orange shafts are coupled and spin at the same speed. Mainshaft - (orange) connects to the rear driveshaft (red) by axial stud which is a little difficult to see in the diagram (where red and lime green meet). The clutch has a splined hub with mates up with the splined end of the driveshaft seen in the diagram.ġ0. Rear driveshaft - (red) engine torque is delivered to the transmission via the clutch/flywheel that live in the clutch bell housing (21). Let's follow the transmission of power from the engine to the wheels. I have colored the b&w components I'm going to talk about.
Vw o2j transmission close ratio manual#
You can find the diagram below on of section Transmission and Rear Axle in your Bentley manual (click on the diagram and open it in another browser window for a better view if you wish). Before I can explain how gear shifts are accomplished, let's get familiar with basic components using the same identification numbers in Bentley's cutaway diagram. Of more general interest, is an explanation of how it works its magic as your change gears. The VW transaxle is fascinating study for the compactness of its design. However there is only the briefest of overviews about how the transmission actually works. Have you ever wondered how the VW 4-speed transaxle works?īentley as always has some nice cutaway diagrams that show how a transaxle combines the features of a transmission and differential into a single case.
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