I have a 94 T/A with a 4l60e. Had it built by Neal Transmission. Had it for almost a year. I put an LS1 drive shaft in it. Soon after it started to leak. It LOOKS , Im not saying it is for sure, like it is leaking from the seal and the speedometer sensor as well. I asked him if the seal would leak after the driveshaft was replaced, he said yes about 2 months ago and no yesterday. He also said that he had never seen a sensor leak like that, but he said it could happen over time due to the heat and what not. So my question is, should I replace the seal? And what do I do about the sensor? Thanks in advance for suggestions and thoughts.