Allison 3000 harsh shifts

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Cottoncar64

New member
Joined
Jul 25, 2017
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1
I have a 2000 truck with an Allison 3000 series trans.  Trans shift extremely harsh will slid the wheels. No trans codes or engine problems.  Did a service on the trans and used Allison doc to reset adapts. Shift smooth for a short time then back to SLAMING shifts.  Any suggestions
 
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