After Trans oil Change/harsh downshift now

[Rockit]

Originally Posted by Overboost

This is always my fear when considering a transmission fluid/filter change. Some have no issues and some have issues after the change. From reading and researching, I can not get a clear understanding on the adaptation resets for a simple oil and filter change.

I would love to hear more theories on what should actually be done when changing the oil/filter in both ZF and GM automatic gearboxes and also the recurring conversations of leaving high mileage transmission alone vs. diving in a rolling the dice.

One guy I would love to hear from the is automatic gearbox guru over in the UK (I always forget his name) but he knows his stuff. (RRPhil)?

I hear you....My 02 4.4 is in perfect shape and I fixed all the engine issues, timing chain guides, valley pan and 3 new sets of front ends...while I can buy a brand new one I feel committed So I keep this as a beater but with all my cars and bikes I want them perfect. 18 year old trans fluid was black. I do drive this a lot.

I found this procedure and will try and do this tomorrow.

"Turn key to position 2. But dont start the engine.
-Floor the gas pedal for 30-40 secs.
-Release the gas pedal, step on brake and start the engine.
-Drive FORWARD (Not reverse, so make sure you are out of your garage before you attempt to do the transmission reset) "

Do this every other month or when the transmission start slamming again.