The 5.3L + 4L60E is the standard motor tranny combo for Chevy trucks
sounds like you need to change your tranny filter and fluid ( never ever have your older tranny power flushed)
either the oil is burned up and dirty the filter is clogged or most likely,the transmission is just worn out
why won't a 2001 Impala shift into high after it warms up? All shift sensors have been replaced
This isn't a good thing. Althou the tranny could last a long time more, it sounds like your tranny is telling you that its on it last leg. You can try by replacing the tranny fluid filter, but this could also make the problems worse. It may be more cost effective to install a remote starter feature, this way you press a button on your key chain, the tranny warms out, and you never had to leave the house. At least until you get the proper repair fixed.
How can I tell if a 1995 torque converter is going bad the tranny slips and stops when it warms up.
i would suspect either a low fluid level, or a nearly wornout transmission.
First of all: That truck is suposed to have a 4L60E transmission in it from the FACTORY. NO other trans. will work. If it does have a 700R4 in it then that's why it won't shift.
NOTHING UNDER THE YEAR 2000 WILL EVEN BOLT UP. 1/2 tons MUST have the 4L60E in it. NO way around it. The 3/4 tons MUST have the 4L80E in them.
could be bad mounts on either the tranny or engine?
Have you checked the fluid level? Some transmission dip sticks you can check both cold and hot. If you can check yours...........but the best measurement is when the tranny is hot or up to full temp. The fluid expands when ti gets warm and maybe your tranny is low when it is cold and until the fluid warms up, it has a difficult time trying to shift gears.
The type of surface that warms up the slowest is the "ocean" surface.