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Re: 4L80E electrical problems? by Jim
Post New Message I am kind of experiencing the same problems with my 93 GMC 2400 truck
and the TCC solenoid locks in the torq
convert if its slipping out it may be causing your problems, or it could be
the shifting solenoids 1-2,2-3, 3-4

Now my truck started after warmed up
to slip out of over drive back to 2 or 3 gear and if it sets a hour it will shift good again for up to 10 miles and
repeat problem, plus at times it will shift real hard like the hotrod shift kits makes a tranny do. I did read in a book that if the tranny oil reaches a temperture of 293 for more then 30min
it will start acting up, you could have a flow problem to were it's not cooling down as it should. I am going to install a new tranny cooler to see
if it takes care of the problem as a test result. If not I will return the lines back to the factory ones.
This is all I can offer you as for as
what I know about the matter

Jim
All Messages in ThreadAuthorDate
Post New Message4L80E electrical problems? Bill 12-16-07  
  Reply to MessageRe: 4L80E electrical problems? Jim 2-3-08  
  Reply to MessageRe: 4L80E electrical problems? BUBBA THE BUS TECH 12-17-07  
  Reply to MessageRe: 4L80E electrical problems? Carl 3-11-08  
  Reply to MessageRe: 4L80E electrical problems? Shannon 5-29-08  
  Reply to MessageRe: 4L80E electrical problems? Charles Butler Jr 8-7-08  
  Reply to MessageRe: 4L80E electrical problems? Andrew 10-28-08  
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