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Old November 22nd, 2010, 03:37 PM   #1
s10v8zach
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Default 6.0 to th350 question

ive done lots of reserch on the parts needed. i have an 05 6.0 from a 2500hd and an th350. i bought the flexplate spacer and a 5.3 flexplate. my question is will the 5.3 flexplate cause an imbalance issue with the motor? i dont think it will but better safe then sorry. also someone told me i could use the 6.0 flexplate all i would have to do was drill new holes for the torque converter to bolt to the flexplate is this true? need some help from people that have done the swaps. thanks in advance.
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Old November 22nd, 2010, 04:11 PM   #2
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I would call a Chevy dealer and see if the part numbers cross. if they don't then you may have a problem if ones externally balanced and one isn't
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Old November 22nd, 2010, 07:22 PM   #3
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thanks yetti ill do that tommorw but i didnt see any balance weights on either flywheel
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Old November 22nd, 2010, 08:13 PM   #4
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Quote:
Originally Posted by Yetti View Post
I would call a Chevy dealer and see if the part numbers cross. if they don't then you may have a problem if ones externally balanced and one isn't
That's some great insight right there.

For arguments sake, the 5.3L and 6.0L flex plates are the same. The most you will need to do is redrill the holes so the Th350 torque converter will bolt up. You will also need longer torque converter bolts and either spacers or an accurate stack of washers to keep the flex plate from getting any loads put on it that it isnt intended to see, axial loads specifically. Make sure the new converter bolts do NOT bottom out.

But.... I'd look into using a TH400, 4L60 or 4L80 before a TH350 though. To each their own.
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