Does anyone know if there is a after market upgrade for the steering servo that comes stock in the T4.

Any "standard" sized 10th scale servo will fit.

You can also get an alloy steering rack from Yeah Racing. Best way to buy is on eBay if you can wait a few weeks.

Check out the New Futaba Brushless Servo #BLS451 it is a great servo,I was having servo problems in my 1/8 Scale buggy and this fixed it. I put them in that and in my XXX-T CR and XXX-4 G+ 4 Wheel Drive Buggy.What a great new product.