13B/20B/26B RX-7 Rotary Adapter Plate Instructions

13B/20B/26B Rotary Adapter Plate

Step 1: Cut the bellhousing off of the 350Z/370Z transmission that you have.
We have a YouTube video on our Collins Garage channel on how to achieve this.

Cut the 350Z/370Z transmission’s bell housing approximately 1/16’’ (0.0625’’; 1.5mm) behind the second casting band that wraps circumferentially around the transmissions bell housing, marked by the dotted “cut line”.

Step 2: After cutting the bell housing off and cleaning the dust away from the transmission, before, removing the input shaft cover. Remove the input shaft cover from the 350Z transmission by removing the (11) M8x1.25 hex head cap screws.

Step 3: Near the bottom of the exposed area behind the input shaft cover, you will see one small M8x1.25 nut that is tightened onto a long bolt. You must cut this bolt flush with the nut, so that nothing sticks out past the end of the nut.
Step 4: Clean the Collins Performance adapter plate face with brake parts cleaner, be careful to avoid spraying the input shaft seal with any brake parts cleaner as the input shaft seal comes pre-lubricated. Now place a generous amount of liquid gasket (Toyota FIPG is recommended) to the face of the Collins Performance adapter plate, that mounts to the 350Z transmission, shown here in black:

Step 5: Use the bag of bolts that has (9) M8x1.25 50mm flat head cap screws and fasten the Collins Performance adapter and bell housing to the already cut 350Z transmission.
Step 6: Use the bag of bolts that has the (2) M8x1.25 30mm flat head cap screws and fasten the Collins adapter plate and bell housing to the already cut 350Z transmission.

Step 7: Insert the supplied pilot bushing into the Rotary eccentric shaft, using a piece of wood in between the pilot bearing adapter and a hammer or use a plastic dead blow hammer.

Step 8: Fasten the T56 concentric slave cylinder (“throw out bearing”) onto the Collins adapter using the (2) ¼’’-20 hex head cap screws from the bolt kit.

Step 9: Fasten the Rotary automatic bell housing to the adapter plate with the (9) M10x1.5 30mm hex flanged head cap screws.

Step 10: Cut, trim or shave any and all casted bungs around the outside of the remaining 350Z/370Z bell housing. This will make the bell housing smaller and easier to install into the throat of the FD RX-7 transmission tunnel.

Step 11: Install transmission onto engine and you are complete. 
If you have any questions, do not hesitate to call—it’s what we are here for! (803) SWAP-1UZ

Thanks again!