Hello Mike,
We don't offer .622 ratio, we make only those ratios, that can be used in the most of 5-gear gearboxes. The most popular 6th gear for TDI engines was .65, which continues on .75; VW makes 5-gear gearboxes with longer 5th gear now, so we had to add .59 ratio to our special 6th gears. It continues on 5th gear .71. We are preparing 6th gear .52 for new generation of VW T5 with 5th gear .66 gearboxes. 6th gear .74 is the most used in gasoline engines.
We believe, that it is possible to build optimal solution for every gearbox 02A, 02J, 02B, 02R.
Gear ratio 0.62 can't be used, because our solution has 6th gear in place of 5th gear and driven wheel are different from manufactured (as in image)
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With sending 2 kits together, the shipping cost will be as for only 1.
Regards,
Radim