Hello all well I have put about 10,000km on my new to me 2008 sierra Z71, it had almost 60,000km on it when i bought it a few months ago, ...

Hello all well I have put about 10,000km on my new to me 2008 sierra Z71, it had almost 60,000km on it when i bought it a few months ago, well now its got 70,000km and noticed the tranny was leaking around the bell housing service ports....anyways i thought it was the front seal in tranny but turned out to be a cracked torque converter.....this happen and normal on these transmissions? anyways under warranty so it was fixed for free....and no leaks yet! her is the dealer invoice for work performed.

First I've heard of a torque converter leak. Great that it's under warranty.

Glad it happened under warrenty and the dealer took care of you. That 500 dollars didn't even factor in labor, that would have been a pretty penny. A slightly higher stall converter would have been fun to swap in while they had it open though.

Well the truck was back at the dealer today as I noticed the torque converter was surging and slight shudder at 80km and tach would go up and down between 1300-1500prm....when I picked up the truck they told me their tranny guy confirmed TC was slipping 200rpm and 89%....so I was told the part was on order but will take a week or more...they would call when it arrives and will put in a couple hours. The thing is I dont tow are anything...this is my daily driver...180km round tip and 98% freeway driving, I did have the dealer flush my tranny just over a month ago....could this be the problem?? and I almost think its started surging not long after that...[possible dealer flush could harm the TC? or mabey because they used a remanufactured TC? also the KM on my truck now is 110,000km