I recently installed a Hayden 678 transmission cooler after the stock cooler and I am wondering if I messed something up. Everything seems to be running fine but I ducked under and felt both the return and sending lines and seems to me that there is a very subtle difference in temperature between the two. I never felt the lines before I installed the cooler so I am curious if I am heading towards a meltdown or if this is normal.

 

yes that is normal. one line its bringin cooled fluid the other is pushing hot out to be cooled.

 

Sounds like it fine then. I guess I was expecting a larger difference in temperatures between in and out.