Fish Bite/Chuggle

mountaincreek · March 30, 2021

Hi,

I am late to the party for sure. Could some one out here contact me regarding if the Black Bear tune fixed the fish bite / chuggle issues. I saw where SCUBA78 said his was fixed., but that was a while ago. I am a little fearful from other posts about the torque convertor needing to be replaced. If the torque convertor is the primary issue, then I do not want to throw 709 bucks for a tune that is faking the ECM/TCM to make me think its repaired. Then another 75 k on the truck and the transmission goes. Please advise. PLEASE. Thx

Edited March 30, 2021 by mountaincreek
correction

sonerick · March 31, 2021

I've had this issue since day one with my truck (2017 5.3L 6 speed). I had one TSB performed that slightly improved the issue (forget the TSB #, but it was software reprogramming, not the new fluid/fluid exchange TSB that's out for the 8-speeds). Otherwise have used a Range device on and off for a couple of years to help deal with the issue. No tune, although I have considered it.

Just after I turned 100k miles this past January, I had one day where the transmission really acted up and a check engine light came on (I think it was P0741, TCC clutch performance or stuck off). I cleared the code with a ScanGauge, but the poor shifting continued and the CEL came back on. The dealer diagnosed the issue as the torque converter. They replaced it and the check engine light has been off since. Shifting returned to "normal" along with the fish bite issue. No different than the first 100k miles. This leads me to believe the engine/transmission tuning is the issue, and it eventually causes the torque converter to fail. Not the other way around. Based on this anecdotal evidence, getting a tune early on in ownership may avoid torque converter issues down the road.

Hope this helps.

mountaincreek · March 31, 2021

32 minutes ago, sonerick said:

I've had this issue since day one with my truck (2017 5.3L 6 speed). I had one TSB performed that slightly improved the issue (forget the TSB #, but it was software reprogramming, not the new fluid/fluid exchange TSB that's out for the 8-speeds). Otherwise have used a Range device on and off for a couple of years to help deal with the issue. No tune, although I have considered it.

Just after I turned 100k miles this past January, I had one day where the transmission really acted up and a check engine light came on (I think it was P0741, TCC clutch performance or stuck off). I cleared the code with a ScanGauge, but the poor shifting continued and the CEL came back on. The dealer diagnosed the issue as the torque converter. They replaced it and the check engine light has been off since. Shifting returned to "normal" along with the fish bite issue. No different than the first 100k miles. This leads me to believe the engine/transmission tuning is the issue, and it eventually causes the torque converter to fail. Not the other way around. Based on this anecdotal evidence, getting a tune early on in ownership may avoid torque converter issues down the road.

Hope this helps.

Ohh Man. Not good. So ironically, I took mine in and the issue hasn't been "replicated" at all after 500 miles of test driving it. The tech, me and the tech and just me. I am at a loss. The tech did say that he checked the codes and GM had a update and so he updated it. He updated it around the 300 mile mark of the test driving we were doing together and in part. I cant get a flipping answer from no one. I point blank asked the GM at the dealership that I am willing to pay for it if they in fact think they can "fix" it. Without it doing it for them, they cant say what it is. I tried brake torqueing it. no Dice. I feel it. Its on the fringe of doing it, but it hasnt done it really good like I have been experiencing. I have had this truck since 24k and now it has 88K. I have mentioned it several times to the dealer but its just one of those things that has to act up at the dealer. I havent the first clue as to how to capture the acting up on my own for proof. GM said that IF they could get it do do it, that GM would maybe pay for 25-50% of the bill because of the previous Hx. So after reading your post, now I am really confused.

Also I might add, that I take very good care of my truck. I love it. And you might ask, why do you put up with it. Well to be honest the sporadic-ness of it has gotten less and less to where it does it nearly every long hill. I just press the pedal more and it downshifts and its gone. Sooo it has come time to trade fix tune or something

Edited March 31, 2021 by mountaincreek