Porsche 981 PDK Rear Case Press Template

This is a 3D Printed template to help build a press tool that is required to remove the back half of a 981 PDK transmission. A 2D PDF is also included as an alternate, be sure to print 1:1 scale if you use it.

I referenced Jeff Richardson's fantastic video showing how to complete this job, linked here: 

This template can be printed on a Prusa Mini, required bed size is 155 x 155 or larger.

Three pins protrude to allow for precise positioning on a 6" x 6" piece of steel bar stock:

The holes are 4.5mm to allow for use with a center punch tool. With the holes marked, it's a simple matter of drilling thru-holes for the M10-1.5 bolts or threaded fasteners required. I used a drill press to make mine.

I had a piece of 5/8" bar stock on hand, a ½" piece is probably stiff enough. Here is an example of a parts list that would work:

1x Plate: https://www.mcmaster.com/8910K5-9143K48/
6x M10-1.5 Threaded Rods: https://www.mcmaster.com/99055A321/
10x M10-1.5 Nuts: https://www.mcmaster.com/97765A130/

I used a threaded rod to align a 32mm OD socket on the lower mainshaft (I reckon any socket with a 30-33mm outer diameter would work).

On the upper input shaft, I used a stack of washers with a 1.5" OD (38mm) sitting on an M10 nut. Note that the upper and lower shafts are of different depth.

My print time on a Prusa Mini+ was 1.5 hours, using 42g of PLA.

Reassembly:
To get the case back together, you'll need a fine pitch large diameter thread. These can be hard to source, but luckily, I found Caterpillar uses these threads on readily available affordable fasteners. The following parts worked for me:

Caterpillar 156-7993: M22-1.5 x 105mm Hex Head Bolt
Caterpillar 577-0029: M24-1.5 x 78mm Hex Head Bolt