Bully Dog shift kit

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Feb 20, 2006 | 05:19 PM

EXTREME

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From: Virginia

Bully Dog shift kit

i was installing one of these a couple weeks ago on an 03 duramax/allison and noticed it didn't have any checkballs in it, why is this? i guess i just assumed all auto trans had check *****?!

thanks,
jones

Feb 25, 2006 | 10:45 PM

TchargedLS1TA

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From: Temple, TX

Allison's use solenoids instead of check *****- one of the reasons they handle so much torque. The line pressure in those transmission are so great that they would push through any check ball