Peacekz

One more thought -the break surface is polished by rotating during the car was worked. And we pulled the car to the garage with the engine started so the brakes was good. So i guess the surface will not tell the truth. I guess the shaft was broken due to it has a vertical play.

SO Most likely it is due to Over-power?

SOrry for miss-telling The shaft i tell about is called Mainshaft.

I will make a better fotot later. It looks like it was cut very fast no curves from twisting. For me it looks like it is cracked perfectly. But i did'nt look detailed to it. Will post later

Hello Sorry no better foto. I dont know exact power. it should be around 600 HP i think taking in consideration i load 89% of 720CC injectors and making 11.4 ET with bad start. Soru english is not a native, what do you mean by fracture? the place where i see a wear on the shfaft where it contects needle type bearing or the photo of the the shaft where it was broken? Yes i understand that was my mistake to launch on 50/50, but i'm quite expiriencde in gt-r's and never seen countershaft failure like this. There is always a weaker point than these solid 29mm stell shaft.

Hello Everyone. Please help me identify problens with my gerabox. I have a BNR32, with nice built RB26 and S362FMW runing 1.2-1.4 bar of boost. I have broken 2 sotck trannys so i ordered OS-giken 5 speed kit with input shaft and center plate. Installed it and my problem seem to go away... until i get to drag strip. While making my starts better and better tuning launc and torque split finaly i set up launch to 7200 and forgot to remove 50% fo torque from front i didn ont start at all, the car didnt even moves. later in garage we found that it is counter shaft broken right after 5 gear. Here is a picture If you look closely you can see wear on the shaft in the place it inserts into a wall between gearbox and transfer case. What can be the cause of this? I mean the cause of breaking shaft i guess wear shows that shaft was not proppely secued and had a play. All kind of bearings including bush in the crankshaft?