Which one, i have always done a drop and fill. replace filter and gasket.

In a vehicle over 50k miles with no prior flush, many technicians suggest dropping the pan instead of a flush- they beleive the flush exposes the tranmission to failure after the flush.
For me-neither flush or dropping the pan. I do a systmatic siphon of trans fluid out of the trans dip stick three times over a two week period. Very simple and easy on everything. One issue with my method would be if the filter is clogged.

Drop and fill with a replaced filter and gasket. A flush might cause problems.

I'm with Roy.

Plus, you never know if they are using old oil to do the flushing. I trust no one these days.

How come i'm not getting an e-mail notification when someone posts to a thread i started or respond to?

forgot i probably won't get it so i will just log on on my own tomorrow.

on my 03 monte i had the flush and filter at 70 and 130-140 and sold it at over 170 and never had a trans issue

my 98 bonnie i did pan drop and filter at about 70 and 140 and it went at about 155.

i did a drop and fill at 50k(bought the car brand new) just thought a flush would be a good idea but i will end up doing another drop and fill and also the coolant and brake fluid. car has 100k now.

I suggest not doing a flush. It can loosen things up and cause problems. A drop and fill is fine.