How to install vanilla Android on ASUS Transformer TF101G

[AC Question]

Hey, guys. I have an old ASUS Transformer TF101G which is running insanely slow (it's lagging even when I change the page in a boom) , so I decided to root it and install a fresh vanilla Android. The problem is, I'm new to rooting and every tutorial I found on the Web is for TF101 and is not compatible with the G version.
And even if I succeeded in rooting it I have no idea which Android build to install, how, and where to download it from.

So, I'll be extremely thankful if you could help me out.
Thanks in advance,
Spas

 

[anon(632115)]

You can't install anything other than firmware written for your device. Flashing incorrect firmware will likely kill it. Latest FW is 4.0.3. You may be able to find a custom ROM on xda forums