dml3Audi

Ok so I got this audi a while back, and 1st gear has always done this. When you stomp on it from a dead stop 1st gear stretches out like it's not gonna end. It'll get up to about 5k rpms and sluggishly keep going until 2nd engages. It's a 1996 audi a4 quattro b5 platform. 2.7 liter V6 automatic. I've done a service on the transmission such as new fluids and filter along with gaskets. Any help would be much appreciated. Had a friend mention maybe the torque converter being the problem. But it is only in first that it does it. Every other gear pulls just fine. Thank you again