if a torque converter locks does the transmission need to be replaced

What is your question?

In early July around the 12th my Nissan Altima started jerking forward and shut itself off at a stop sign. After researching the problem on the internet I found out about the Nissan issues with the CVT transmission. I drove the car home and parked it in the garage. When I took it in to be looked at the service guy told me the torque converter locked and I would need a new transmission to the tune of $4100. First question is does the whole transmission need to be replaced and if so what is a good estimate on where I should take it.

How long has your 2013 Nissan Altima had this problem?

few weeks