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C6 issues, rebuild??

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Old Aug 1, 2011 | 01:16 PM
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From: Residing in the shwa. On.
Question C6 issues, rebuild??

Hey guys, my trans is making some nasty noises and shifts like poop... Just before it is ready to shift it is making a strange noise like a rattle/vibration. It shifts fine from 1st to 2nd with only a slight rattle, however it won't shift into 3rd untill about 70kms/45mph and doesn't like to stay there? It really wants to sit in 2nd. Needless to say whatever economy it has is tossed out the window. Could this be in need of a rebuild? or is it something I can fix? Btw I just changed the fluids and filter and it helped a little bit but not as much as I had hoped, any thoughts are greatly appreciated!!
 
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Old Aug 1, 2011 | 02:54 PM
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As much as you probably don't want to hear it, it's time for a rebuild.
 
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Old Aug 1, 2011 | 03:43 PM
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X2 on that when the C6 wants to stay in 2nd and does and shake, rattle and shimmy, it's time to pull it. John
 
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Old Aug 1, 2011 | 04:08 PM
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I thought as much you're right I didn't want to hear that! Lol ok thanks guys...
 
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Old Aug 1, 2011 | 06:22 PM
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When you do pull it,you might want to think about a shift kit. I have used them in evey trans, C6, dodges, and now in my 03 2500 ram diesel. I think they help in the longevity of them. There's also a mod for using the E40D forward gear cluster for a lower 1st and 2nd with 3rd gear remaining 1:1. John
 
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Old Aug 2, 2011 | 03:28 AM
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Cool thanx, I was going to do the shift kit, I didn't know about the gear swap I'll look into it...
 
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Old Aug 2, 2011 | 05:04 AM
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The best kit for the C6 to fix a lot of inherent flaws with it is from superior and I consider it a must have when building a C6! 4L60E 700R4 4L80E 4R100 E4OD 2004R C6 TH350 TH400 Transmission Parts: SUPERIOR C6 SHIFT CORRECTION PACKAGE W/ BOOST VALVE
 
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Old Aug 2, 2011 | 05:34 AM
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C6-C4.com the Ultimate C6 / C4 Performance Transmission Website

seems like a good place for parts also, Check it out.
 
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Old Aug 2, 2011 | 10:12 AM
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A shift kit will definitely improve the life of your trans. It basically reprograms the shift characteristics so that the clutches engage quicker, getting rid of the normal "slip" that was built in by the factory for comfort. When they design something like a trans, it's a balancing act between keeping them running and making them "comfortable" for the average consumer. Think of it in these terms: which will keep a standard transmission clutch alive longer??? Slipping the clutch every time you let it out, or just letting it out and getting it hooked up without slipping???? Another auto transmission "saver" is adding a good cooler................
 
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Old Aug 2, 2011 | 10:38 AM
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Whats involved with putting in one of those shift kits?
 
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