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4l80e shifting problems thomas 3-9-09  
I have 1ton chevy dually with 4l80e
it has P R D but D is stuck in 2nd when i reset the computer it has 1st untill ishifts into 2nd and then it is stuck again i changed out the input and output sensors but it made no differance the speedometer doesent work and multiple trannyshops have said that if doesnt work it will not shift so what i need to know is, is that true and if so how do fix it i checked my tranny fuse under the dash to and it has power
Thomas Milford
Re: 4l80e shifting problems rude 4-24-09  
This is true,check for any trouble codes?if you have acess to a scanner ck and see if computer is seeing speed sensor signal,gm scanner can ck speedo to see if functions properly.if you have codes stored try clearing them and drive truck to see if all is may have bad instrument cluster.
Re: 4l80e shifting problems mr ansari 6-7-09  
I have a superban 2000 i have problems in shifting so when i drive about 10 miles so the car stsrt shifting hardly in all speeds.
Re: 4l80e shifting problems steve cseley 8-12-09  
Need help on old transmission
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