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Re: 4L80E transmission shifting trouble by Bubba The Bus Tech
Post New Message The 4L80E is pretty much as indestructable as a GM built transmission ever built.

1st Your 4l80e is programed to be "Invisible". The shifts are not supposed to be felt.

2nd If your trans was slipping to any damaging degree it would have torn itself apart in less than 100 miles.

3rd If you check the oil and it is nice and red with no burnt smell its fine.

Climbing hills you are going to have high RPM, and very loud cooling fan noise.

All this may be making you concerned for no reason.

If you are still concerned take it to a transmision shop that can run a diagnoses while going down the road. They can see weird things like "Desired" slip and actual slip numbers for each clutch. Many of these had a desired 1 rpm slip target (Weird but true) to make the engine seem smoother and the transmission shift smoother.
All Messages in ThreadAuthorDate
Post New Message4L80E transmission shifting trouble Russell R 6-13-16  
  Reply to MessageRe: 4L80E transmission shifting trouble Bubba The Bus Tech 6-14-16  
  Reply to MessageRe: 4L80E transmission shifting trouble Dallas 4-13-17  
  Reply to MessageRe: 4L80E transmission shifting trouble Dallas 4-13-17  
    Reply to MessageRe: 4L80E transmission shifting trouble Dewight schoggins 7-27-17  
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