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.

[Overboost]

From my reading and research, I read that procedure you listed and some described hearing the clutches reset, others on our forum here said it did nothing, no sound or no difference. BMW Logic7 seems to be the reference for your ZF box and they claim the throttle pedal--> transmission adaptations reset procedure is only an old wives tale.

Everything about your ZF 6HP26, 6HP19, 6HP28 transmission issues | BMW LOGIC7

I did find this video for the ZF gearbox and a chart listing the adaptations reset procedure but honestly, I am no expert and am hoping to learn more from this thread.

https://www.youtube.com/watch?v=nN78ukXXF_o

[Rockit]

Originally Posted by Overboost

From my reading and research, I read that procedure you listed and some described hearing the clutches reset, others on our forum here said it did nothing, no sound or no difference. BMW Logic7 seems to be the reference for your ZF box and they claim the throttle pedal--> transmission adaptations reset procedure is only an old wives tale.

Everything about your ZF 6HP26, 6HP19, 6HP28 transmission issues | BMW LOGIC7

I did find this video for the ZF gearbox and a chart listing the adaptations reset procedure but honestly, I am no expert and am hoping to learn more from this thread.

https://www.youtube.com/watch?v=nN78ukXXF_o

Thanks, really appreciate the help. I saw those too....will report back with the trans program, if it workers or helps. I have to head out for the afternoon.