Hyper_545i

+1

Thank you!

KyleB

You're welcome. If you need any pointers, etc post here or feel free to PM me. sounds like you have worn out solenoids just like the rest of us. if you do end up replacing them make sure you replace the bridge seal and four sealing sleeves that sit between the Mechatronic and the transmission casing, they're very important!

Amherst

Have to disagree with you here Kyle.
My money is on low fluid level or incorrect fluid type replacement.
That is if and only if...... the symptoms are new since the pan change.

Maybe if that transmission is excessively crapped up on the inside and sediment was loosened during the pan change will a drastic change occur. Unlikely as the OP would have noticed prior issues.

Hyper_545i

At this point, I can't really rule any of these suggestions out. I'll start with the easiest solution and work my way up.

I never had any issues prior to the drain. I did not even have issues directly after the drain. I would say this started a few weeks back. That is why I am leaning more towards the solenoids. Can't hurt to drain / refill. I'll get more of the original fluid out I guess. I would just hate to drain / refill to find the same issue.

KyleB

Hey for his sake I hope you're right and I'm wrong My guess that fluid gets changed, adaptations get reset, and transmission behavior doesn't change. There are so many of us that have been down this road and almost every time it's been down to bum solenoids in the valve body.

Hyper_545i

So the fluid appears to be fine. So leaning towards the solenoids. How many hours does this take to replace? I am trying to find someone to do the work. I got quoted 8 hours labor form an indy. Pretty sure that is way too long. Any ideas?

KyleB

Hate to say I told ya so, but....

In all honesty, eight billable hours is pretty reasonable. If I were still working out of my shop, I'd probably bill between 6 and 8 for the job too. If you do have someone else do it make CERTAIN that they replace not only the solenoids, but also the bridge seal AND the four sealing sleeves that press into the transmission casing. At your mileage I can promise all of them are worn out (the rubber shrinks), and failure in any one of those components can also cause erratic shifting in the gearbox. Ask for the old parts back when they're done if you want.

Good luck, hope it works out for you.

Hyper_545i

Ok, so a funny thing I noticed. I did the accelerator reset (hold for 30 seconds) as I normally do every so often. The issue is not happening. I know this is only temporary, but why would this be the case? If the solenoids were bad wouldn't this happen regardless of this reset?

KyleB

Hard to say, as usually the gearbox shift very abruptly for the first couple hundred miles after resetting adaptations. As the gearbox adapts to your driving habits it should smooth out. The fact that it's only temporary is confirmation that you have a problem.

Are you at the point where you're actually getting transmission fault codes stored in the TCM and/or getting the dreaded iDrive messages? Once it gets to that point you either address it immediately or you will be buying a transmission. Sounds like you're not at that point yet.

mfrasca

Do yourself a favor and replace the whole mechatronic's. I went through this with my 05 545i Get everything from Klaus new pan -filter assembly, case of fluid and the unit. Wish you were closer to Boston I would do it for you. Took me six hours to do mine.