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Drives

Found 1 result

  1. 2014, 5.3L, 86000 miles, Silverado 4x4 with 3.42 gear As title says it has a harsh shift from 2-3 in the morning when cold(30-60 degree in MN). Bulletin says it goes away with oil temp which is true. Notice once above 100F it is good. But mine is not so much a shift flair but a harsh shift, like dropping the clutch in manual Anyone else experience this? Is this bulletin correct or do I have another problem before my 5 year/100000 runs out? Thank you PIP5429: 2-3 Upshift Slip or Flare Some customers may comment on a 2-3 upshift slip or flare. This condition is a NORMAL characteristic of the transmission, it will not cause durability concerns and no repair attempts should be made. At this time this flare condition has been recognized in two different driving conditions: During the first 2-3 upshift after the vehicle has been sitting, engine off for several hours. This condition may be caused by air that is trapped in the 3-5-R clutch assembly. When the first 2-3 upshift is made this trapped air is purged and the following 2-3 shifts will be normal with no flare. When diagnosing this condition a garage shift into reverse before drive will purge this air and prevent the 2-3 flare from occurring. This condition is a NORMAL characteristic of the transmission, it will not cause durability concerns and no repair attempts should be made. When transmission ATF temperature is at or below 85 degrees F (30 degrees C). This 2-3 upshift flare can occur until the ATF temperature warms. If the 2-3 flare is determined to be ATF temperature sensitive use a Tech 2 to make note of the throttle position when the flare occurs. Drive the vehicle to get ATF temperature to at least 104 degrees F (40 degrees C) and then make several 2-3 shifts at the throttle position determined to be the most sensitive to the 2-3 flare. This will allow the transmission adapts to tailor the shifts and may help to eliminate the cold 2-3 flare. This condition is a NORMAL characteristic of the transmission, it will not cause durability concerns and no repair attempts should be made.
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