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Old Jul 21, 2018 | 01:38 PM
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Default 3-4 clutch pack

my 3-4 clutch pack has failed in my 2009 sierra should I replace the clutch pack or put in a rebuilt transmissiont
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Old Jul 21, 2018 | 03:27 PM
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You'll need a rebuilt transmission, whether you have your current one rebuilt or buy a rebuilt one. If you've got a knack for mechanics and attention to detail, you could try rebuilding it yourself. It's recommended to replace or have the torque converter refreshed when the transmission dies. Not gonna lie, it's a LOT of work the first time and you have to do a really good job so that it both works right and doesn't break month later.

Why not just replace the clutch pack? The vast majority of the cost of a rebuild is labor. If you are doing or paying for the labor, you'll address other things while you have it open i.e. rebuild kit with all the clutches, seals, etc. If the 3-4 clutch died there's probably something else that needs looking at, like the 3-4 piston.
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Old Jul 21, 2018 | 04:08 PM
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Thnx I will be putting in a rebuilt is there anyway to defend from this happening in the future with the rebuilt
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Old Jul 21, 2018 | 04:28 PM
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I will put in a rebuilt tranny my original had 170,000 km or aprox 100,000 miles how do I defend from having the same issue later on
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Old Jul 21, 2018 | 04:53 PM
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They normally don't go bad at 100,000 miles, especially newer(ish) ones compared to the 90's. Did you have something done to it that might've been done wrong that contributed to it going bad prematurely, like a transmission flush? If you don't drive like a crazy person and didn't do anything to the transmission, you might've just been unlucky and it had a defect from the factory. Even the 90's ones that had design flaws (later fixed in newer ones) usually go at least 150,000 miles.
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Old Jul 21, 2018 | 04:59 PM
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I have had the transmission flushed last year also put in a new transfer case I try to drive decently as I am not overly intelligent mechanically and try to keep up to date with my service need
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Old Jul 27, 2018 | 12:04 PM
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Originally Posted by coryforsenate
They normally don't go bad at 100,000 miles, especially newer(ish) ones compared to the 90's. Did you have something done to it that might've been done wrong that contributed to it going bad prematurely, like a transmission flush? If you don't drive like a crazy person and didn't do anything to the transmission, you might've just been unlucky and it had a defect from the factory. Even the 90's ones that had design flaws (later fixed in newer ones) usually go at least 150,000 miles.
I'd for sure flush cooler/lines real good before new install.
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