Project S-Turdteen Fixing the Transmission

The same went for the synchros, we cherry-picked good ones from the pile and replaced a few of them with new parts.

Everything pressed together nicely.  The WPC treatment on the splines actually made this smoother.  We replaced the bearings with new Genuine Nissan parts from Fontana Nissan.

The gear stacks were placed on the center plate of the transmission.

The shift forks and shafts were installed next.

The shift forks and shafts are in place.

Now everything is ready to drop into the case!


  1. The 3rd gear always goes first on these transmissions. This is caused by the shafts flexing; the 3rd gear pignons get further and further from each other, until there is not enough material in contact and they break.
    The only way to prevent this is to actually NOT use 3rd gear. Even OS giken gear sets and input shaft replacement break the same way, once over 350/400 engine HP on a SR. It will break with just sticky road tyres, without LSD.

    I am actually looking for a (cheap) solution to this too. The CD009 swap looks tike the cheapest one, but it has some drawbacks… mainly a totally useless 1st gear, and not enough main shaft engagement. More expensive solutions include PPG and Elite dogboxes, but i would really like something in between.

  2. That is the easiest and cheapest swap to my knowledge too. We are going to hold the power down below 300 in the meanwhile.

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