Easy Drug Rehabilitation

My son is on probation in Texas for a felony theft. He was arrested yesterday for DWI, which is his second DWI in 4 years. Will his probation for the theft automatically be revoked?
Also, can an attorney really help, or is it pretty much in the hands of a judge regardless of representation?

What does part does a torque convertor play in the equation?
I have a Scion tc A/T an would like to upgrade the tranny towards more perfomance. I had thought about an LSD to avoid excessive wheelspin but I don’t think that I can do that on an auto.