On the TA05 the way to counter steer it is changing pulley sizes on the diffs and the center shaft. The pulley on the center shaft (the shaft the spur gear is attached to) that goes to the rear diff is increased in size to increase revs, and the pulley on the front diff is increased in size to slow down revs. Belts have to be replaced to accomodate different pulley sizes, good thing about this chassis is that you can get a kit with all you need to CS it to 1.5 - then all you need is a front one way and lock the rear or get a spool.

Active Hobby makes the 1.5 CS kit, here's one place that sells it
http://www.genkidoridori.com/index.p...oducts_id=1040

The front one way is Tamiya 53833
http://www.tamiyausa.com/product/ite...oduct-id=53833

Spool is Tamiya 53877
http://www.etamiya.com/shop/tamiya-5...7.html?image=0