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4l80e shifting problem angelo 1-27-10  
I have a step van union city body 1997 42k miles with diesel,dual rear no pto probally a p 3500 chassis. the transmission 4L80E started jumping out of gear at 55mph as if someone shifted it to neutral then wont go back to gear untill it slows down to 35 mph,now it wont go into 2nd gear i can only go up to 30 mph i brought it to someone w/ a snapon modis and they are not sure if its odb 1 or odb 2 but the scanner cant see it,but there is no tranny light on the dash.reverse is good please help !
Re: 4l80e shifting problem jason bowers 5-22-10  
Sounds like a bad speed sensor check for trans codes. if the guy you brought it to doesn't know the difference between obd 1 or 2 he shouldn't have that scanner. go some where else.
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