OK Here is the set up. I have 209K miles and it has run hot more than a time or two I live in Aridzona. It has been working fine but, I am planning a high mountain elk hunting trip to Colorado next month it will be a 3k round trip...
Remember it has been working fine nothing weird has been happening with it... Should I get the transmission rebuilt or replaced before I go? If I was staying home I wouldn't bother worrying about doing this at all.. Am I just being a worry wort for nothing?
always use a Rental when going on trips
the 4L60e can last forever as long as the temp is at 155-165F spotted a 2LM70 with 300k miles on the original transmission
the 2LM70 is based on on the 4L60e I did have issues with shuttering but it was an electrical issue (insignificant voltage from the electrical system)
Upgrade the cooler to a HD3500 series with AUX fan
Transmissions are temperature sensitive higher the temp the shorter the life...
she works 100% shifts perfectly smooth with 106k.. like BRAND NEW . (Note it does not have a torque converter but a dampening system )