Here are some pics of the drive shaft work of my previous project converting a NA 2+0 auto to NA 2+0 with TT auto: Reference shot of NA 2+0 auto drivetrain
Front part of an NA 2+0 auto connection joint. Note that it is circular.
Same joint as above different angle
TT 2+0 auto Driveshaft parts top. NA 2+0 auto driveshaft parts below. Note that the TT is overall thicker. Other differences in pic show that the auto connection joint of the TT is not a circular shape and matches the contours of its rear propeller shaft. In the NA version it is circular up front and a square shape for the rear. Also note that the spline end sizes do not match
Reference shot NA auto transmission splines
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