Th400, Trimatic, C4 Into A R33 ?

[GTSBoy]

The gearbox.

But seriously....it's not that hard to imagine what you have to change. You need a bellhousing adaption of some sort. You need a gearbox crossmember of some sort. You need a tailshaft put together out of bits to suit the C4 and bits to suit the car. You need a torque converter to bolt to the engine's flex plate that will also accept the auto's input shaft. You need a shifter. You need a speedo cable or sender if you want a working speedo.

For all that, if you cannot manage the imagining and the work itself, you will need a transmission specialist workshop that is accustomed to assembling odd bits and pieces together.....and some spanners.

[Rusty Nuts]

I'm using RE4R03A out of a Z31 was rebuilt with new parts, the standard bellhousing fits this box, Tailshaft built by Hardy Spicer in 24 hours, slight changes to crossmember, redrilled flex plate to suit converter, and added manual valve body to get rid of TCU and running a guard mounted cooler, been in car behind a 30/25 for nearly 2 years. Good for 600 HP all day every day according to builder plus shift pattern change to P R N 1 2 3 4, and heaps cheaper than C4 or Powerglide, too easy.