Transmission Fluid leak

[Fear This: Cummins!!]

I recently had my truck to a performance shop (1-1/2 hours away) and the transmission fluid and filter were changed. After it was back home in my shop for a few days, I noticed red fluid on the floor and grabbed the creeper. Their are 2 lines connected to the side of the transmission oil pan near the top. I received TDR issue 89 and low and behold on page 37 is the exact lines I am talking about. Notice there is a line with a BLACK Rubber and a YELLOW rubber. It is the line with the black rubber fitting that is leaking. It is leaking where the line pushes through the rubber. I am wondering if I put a wrench above that black rubber fitting and tighten it a little, if that is going to fix the problem? The leaking produces a slight drip off the line which leads to a small puddle. It is not leaking profusely.

Thanks, Jared

2013 3500 Dually, Aisin, 4.10

 

[TFucili]

I'd speak with the shop before touching it. Send photos if they want them. Then, they can tell you to try that, or bring it back to them to inspect/correct. If something is FUBAR, you want them to own up to it.

 

[gsbrockman]

I recently had my truck to a performance shop (1-1/2 hours away) and the transmission fluid and filter were changed. After it was back home in my shop for a few days, I noticed red fluid on the floor and grabbed the creeper.

Did the shop simply drop the pan and replace the sump filter, pan gasket, and fluid.....or was a transmission flush performed as well???