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Allison 5sp: Limp Mode after 5 Seconds in 1st
I humbly submit this request for help to a knowledgeable group of individuals. 2003 GMC Top Kick C5500 w/ Allison Problem: When vehicle is started and placed into drive the trans will shift into first gear for around 5 seconds and then slip into limp mode/3rd gear and remain there. So...- Jason Douglas
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- Forum: Introductions