Dfair622

Thank you. So I’m assuming that would make it the line out of transmission? Making the other line the out of radiator line

Hey y’all, so this may have been answered before, but I can’t seem to find it. I’m adding a transmission cooler to our 2014 Silverado LT Z71 5.3 for towing our travel trailer. Which line on the radiator for the transmission is the out let (out of radiator back to transmission) line? I know I can torque brake it to find out but want to measure twice, cut once. Thanks in advance.

If it hasn’t been fixed yet, and others are having this issue, it’s the torque converter failing.

No I haven’t… but UPDATE and most likely the solve/culprit. ok, I have a buddy of mine that works on Chevy fleet vehicles. Had him get under it today. Culprit is the torque converter guys… it has what he described as a “flaw” but not a fatal flaw. He said the torque converters on these trucks are notorious for rattle and whining. Meeting with him Saturday to do a fluid swap and an additive that is supposed to quiet the noise. He did advise me that these transmissions are notorious for going out at the 150,000-200,000 mark so be on the look out for that as well. Hope this helps y’all, I’ll keep you updated after the fluid swap and additive are put in. My trans fluid needs a good swap anyway from the looks of it. There was supposedly a bulletin issued for this but I can’t find it. GM Blamed it on “over lubrication”. This is the same dude that I’ve gone to and diagnosed problems (correctly) over the phone in the past.

Besides my reply from last night has any one seen a fix for this?

I know I’m coming in 4 years late, but mine is doing this EXACT same thing. Did you find a fix

I just bought a 14 and I seem to have the same thing. No power loss, only happens at low idle, or stationary. Goes away with acceleration. Personally, I don’t know that anything is “wrong” as I have no power issues and no warning lights. Posting to follow to see if further responses show up. Glad to know I’m not alone.