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My 2020 GMC Canyon Denali with 38K miles started having shudders at the shift due to bad torque converter (I infrequently to ~3K lb boat w/Trailer). Its covered under warranty. Anyway, they just called to say that they're going to need another day because they need to loosen the engine mounts and move the engine to drop the transmission. This sounded odd to me. They didn't give me any details on all that they did but I was thinking about the exhaust manifold, turbo, exhaust getting stressed when they push around the engine. I'm also concerned about the alignment of the engine and the premature wear misalignment could cause.

1. Does a Torque converter replacement really require moving the engine?
2. Are my concerns regarding stressing exhaust and alignment valid?
 

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1. I do not know.
2. I would have to imagine they will disconnect the exhaust and hopefully anything that would stressed. Also, I imagine GM has a clear directive on this job that details exactly what needs to be done. Sadly, torque converter replacement is relatively frequent.

I will add, what a shame GM cant figure out the torque converter problems after several model years.
 

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My 2020 GMC Canyon Denali with 38K miles started having shudders at the shift due to bad torque converter (I infrequently to ~3K lb boat w/Trailer). Its covered under warranty. Anyway, they just called to say that they're going to need another day because they need to loosen the engine mounts and move the engine to drop the transmission. This sounded odd to me. They didn't give me any details on all that they did but I was thinking about the exhaust manifold, turbo, exhaust getting stressed when they push around the engine. I'm also concerned about the alignment of the engine and the premature wear misalignment could cause.

1. Does a Torque converter replacement really require moving the engine?
2. Are my concerns regarding stressing exhaust and alignment valid?
I'm guessing because you mentioned the turbo you're talking a diesel correct? If so at the flex pipe flange they could easily unbolt it to allow additional movement of the engine if needed.

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First hand knowledge on this engine. The American dealer book is wrong. The dealer is correct in having to lift the engine.
The reason is you have to remove the starter to unbolt the torque converter. Only way to remove starter is to lift engine (extremely poor design) and only required on American versions because of emissions ****. Unlike the gas version you can not unbolt the torque converter through the access cover. The torque converter is bolted to the flex plate/fly wheel.
 

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First hand knowledge on this engine. The American dealer book is wrong. The dealer is correct in having to lift the engine.
The reason is you have to remove the starter to unbolt the torque converter. Only way to remove starter is to lift engine (extremely poor design) and only required on American versions because of emissions ****. Unlike the gas version you can not unbolt the torque converter through the access cover. The torque converter is bolted to the flex plate/fly wheel.
correct a mundo! Just had my Colorado (Diesel) torque converter replaced in September at +-75kmiles, and yes was in shop two + days, yes engine had to be unbolted to get at starter to get at torque converter...
 
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