Chevy blazer. Have a 2000 model blazer auto when cold shifts gear great but after a long run first two changes get fairly harsh

squidley88, Apr 26, 6:55am
have a 2000 model blazer auto when cold shifts gear great but after a long run first two changes get fairly harsh when cooled a bit changes great any ideas on what is causeing this much appreciated

bash, Apr 26, 9:49pm
try changing auto oil and filter oil mite be breaking down when hot

petermcg, Apr 27, 5:22am
I think you have an electrical related problem, hooking up to a computer to down load the faults might help, but I think that a sensor on the motor that senses water temperature,is one suggestion.

petermcg, Apr 27, 5:27am
Check out this forum and read down the page a bit as it could be your valve body causing the problem.
http://blazerforum.com/forum/engine-transmission-35/unknown-cause-hard-shift-1-2-a-29439/

squidley88, Dec 18, 7:00am
thanks for your help will get oil and filter changed for a start if that dont work will look a bit deeper