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ZL1 converter shuddering with heavy throttle

 

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mchicia1
ZL1 converter shuddering with heavy throttle

Hey, just did a 6.2 swap from 5.3 in my 2012 Yukon.  The car drove very smooth before with the stock stall.  I figured the Zl1 stall would also be just as smooth part throttle, but the car shudders a bit with heavier throttle, almost like a very slight bucking.  Am I just trying to lock it at too low an rpm? Seems ok above 2000 RPMS.

Do I need to change anything with the TCC slip or pressures?

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