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8 > 6 Your mechanic needs to have hung around a dealer or transmission shop over the last 5-10 years. He'd change his mind. 6L80 has a higher issue rate for sure. Torque converters, fluid pump gets wiped from converter failure, 4-5-6 clutches burn up, the TEHCM gets wrecked from the clutch debris from converter failure, some burn up hard parts too, etc. 8L90 has its quirks but if you change the fluid regularly and use the right fluid, its been a more reliable unit over the 6L80. -
I would say the main negative would be that I believe it's around when the 8-speed was introduced, so most likely it will have the original parts, whereas newer trucks will have 8 speeds with various upgraded/improved parts that fixed various issues with it. -
The 8 speed isn't a bad transmission at all. They just have common issues like any transmission. Ideally you'd like to find a low mileage truck or find a truck with good service history or maybe even a factory rebuilt transmission already in it. -
I’m in the market for a K2XX 6.2 truck and I’ve heard some conflicting things about reliability. My mechanic says that the 8 speed is just not consistent at all in reliability and that some people can be ok and others can’t. Given this I was hunting for a 2014 only truck with the 6.2 (which is quite hard to find) and I’m coming on here to ask if the 8 speed is really that bad. I need to expand my years so I can find some nice trucks but I don’t know if it’s better to wait on a 2014 to pop up or to expand my field and get some more deals. Thanks in advance for any feedback and comments -
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By Grumpy Bear · Posted
Why does that not surprise me? 😏 It is more creative that a crowbar on a kneecap. Did it come with the mounted overhead lighting? 😬
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