Upgrade transmission or what can I do?

[Jimmi The Kid]

First off all, people allways talks about the stock transmission are too weak and can not support 200hp. Can someone please tell me what exatly the problem is? and mayby upload some pics of the broken parts.

The reson why, is I newer have any problem with my transmission, but my engine was stock and now I'm building a new 200hp+ race engine.

I have thought swapping an other transmission, like the BMW M3, Mazda MX5/Miata or even a Ford Sierra 4 or 5 speed.
Who have tryed one of these swaps?

I know some tranny's break because of the 2 axels move away from each other, and then the bearings and transmissioncase breake. This problem will be eliminated when fitting a straight cut gear set, but I don´t know who make those for AE86. Straight cut, I mean like the reverse gear, not as the TRD gear set.

At last, which gearkits are available for AE86???