Quote:
Originally Posted by YTNUKLR
Is there anything special to the 906 trans? It looks different from a 901 outside, but the gear stack looks the same. Is that a one-piece bearing retainer? In 1966?
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There are a plethora of differences but your general statement about the gear stack is accurate. I looks similar.
The major difference is the 904 main shaft, gear ratios and the additional oiling hole in the intermediate plate to lubricate the main shaft bearing. This design feature was transferred to the mid-engine transmissions used in the 914/6 but not the 914 /4 cylinder cars.
As you look at the case you will notice that it has extra fins for cooling and structural rigidity. Although it looks similar to the 901 aluminum case, it is in fact sand cast magnesium.
There are also additional bosses for mounting the trans into the chassis. Looking at the shift selection fork you'll notice a large bolt in the center. That is an additional detent designed to aid in rapid shift selection.
Looking through the hole you might be able to notice that the LSD is tiny. It is haft the diameter of the 901/915 LSD ad half the weight.
The output shafts protrude from the differential unlike the production piece. These shafts have an external spline design adapted from the 904.
I believe the flanges are identical to the 904.
The last major difference is the provision for the shift shaft. As you can see, the shift shaft is accessed under the bell housing. this design is different from either the tail shifter or side shifter of the production models.