ZF 9HP Automatic Transmission Model

Working model of a ZF 9HP 9-speed automatic transmission. All 9 speeds and reverse are usable, though don't expect much torque!

The model is here:
https://cad.onshape.com/documents/a6f8219ffba8ec5923b5c51e/w/3317f78ac9c7117b52fe49a0/e/540994a2d325864ab274bdab?renderMode=0&uiState=682e296d34128e1933bf0514
I've only exported one part to STL, so that I can publish the Thing; you'll have to export the rest yourself. You don't need an OnShape account.

You'll need:

  • Some 6702 bearings and 623 bearings.
  • Two bike spokes and nipples, to actuate the two clutches that are buried in the middle.
  • Many M3 screws and nuts, and some plastic spacers of assorted thickness (or just stacks of washers).
  • Two 5/8" rods positioned 100mm apart, to mount everything to - I had these left over from another project that I might publish at some point.

Printing this isn't for the faint of heart, but assembly isn't too terrible. If you're interested in printing one, but intimidated by exporting from OnShape or mounting the rods or somesuch, please shoot me a message!

Based heavily on https://www.thetruthaboutcars.com/2014/02/ur-turn-saturation-dive-into-the-zf-9-speed/ .

Sorry for the sparse documentation! Let me know if you want to know more.