2017 colorado z71

[Double T]

Any advice?? My dealer has done 2 flushes and 6 torque converters since 11/17... Truck still shifts hard (at times).... GM said last week, just drive it like it is, it's normal..... any advice as I have filed a claim with the BBB (pending).....truck just turned 27,000 miles.. Last torque converter changed 04/19, lasted less than 300 miles before shifting hard again.....

[OperaDude]

SIX TCs???? Wow. For the hard shift I've read the valve body may need to be changed out. If they've changed the TC that many times that's obviously not the fix for your issue.

Since this is your first post, what else can you tell us about what's going on? What type of hard shift? Any specific circumstance? Downshift to 1st, or when it's cold from 1st to 2nd etc? There is a lot of combined knowledge and experience here, so I'm sure you'll get plenty of info!

2017 GMC Canyon Denali V6 CCSB 4X4

[Double T]

usually happens when slowing down (in the 15 - 20 mph range)...makes no difference if I drive 1 mile or 50, same hard shifting....

 

[mjm-1957]

Torque converter has nothing what so ever to do with hard shifting. The converters are being replaced for the shudder issue. These were done under warranty at the same dealer? Doesn't sound right to me and I'm the trans guy at a Buick Gmc dealer. I would love to see the history. Give me the last 8 of the vin and I can pull up what was done.

[Double T]

H1326956    thanks

[Double T]

yes, same dealer for warranty work every time.... same place purchased truck... in Augusta, Ga

[mjm-1957]

Okay, the history shows 3 converter replacements.First one done 11/20/17 RO#1166312. Second one-10/25/18 RO#1185965 and the last one-5/23/19 RO#1196738. Also shows 2 flushes done and the last one with the latest fluid.Also shows an oil pan reseal on the same RO as the last converter replacement? Maybe got damaged some how on the last trans R and R. That trans is a real pain to get in and out.I would bring it back again and drive it with the service manager and explain exactly what your concern is and let him handle it. Thats his job. I would expect him to get TAC involved and let them call the shot on what should be done next.Probably going to involve a replacement valve body, but hard to help from behind a computer without actually driving it and seeing the problem first hand. Good luck.

[Double T]

ok, thanks for your help.... I going thru my svc records to see exactly what they documented when I return it to the dealer... It's spent a total of 101 days at the dealer since 11/17...... again, thanks for your help / advice..