4l80e. Transmission failure 1st trip for 2015
My suburban has 123k and just blew the transmission on the first trip of the year. Fresh fluid and cool trans temps. Went to backup trailor on level ground. All gas/no go. Got it to drivewa...
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Glad you have a good trans guy, probably a lot cheaper than a Jasper unit. Here's the tech bulletin that Jasper publishes on the 4L80E with the list of their mods as a point of reference:
