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Old 04-04-2013, 02:05 AM
Highball Highball is offline
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Allison

This was a new venture by the Allison Division and it went though a series of updates and modifications. Allison is still a Division of GM and I'd suggest you use your computer search engine and ask the questions as "2001 Chevy HD truck Allison transmission Updates, Recall and Service notes." I'll bet you find what you may be looking for. They have become very popular and are numerous.
Normbc9
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