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Old 06-06-2010, 06:15 AM
Ben's 545i Ben's 545i is offline
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Location: South of Boston, MA
Join Date: Feb 2010
Posts: 22
Mein Auto: '04 545i, 01 740il
Originally Posted by mikewils View Post
I've been monitoring this thread for a while. My car went in today for the second time in 2 weeks with the "hiccups" as my daughter calls them. Same hesitation between 30-40 mph as everyone else, only its slightly worse this time than last and they happen about 10 secs apart as opposed to 20-30 secs apart last time. I was getting the shifting slam also, felt like I hit a pothole and got hit from behind at the same time. The first time the car went in, they changed out the transmission sleave which was causing a fluid leak. Fixing the leak seems to have fixed the slam, but not the hiccups. I told the SA about this thread and the mechatronics issue but he so far is hesitant to ask BMW to authorize that repair and replacement. The car is under CPO so BMW will have to eat the cost - probably why they don't want to replace the part. We'll see what they come back with this time, software refresh or something else. If they can't get this fixed, I'm dumping it when CPO is up and finding a CPO 550i with a stick.
You're describing exactly what happened to me. I had a cracked tranny pan that was replaced and had them do the sleeve too. I also had them change the fluid while they had the pan out - this isn't called for in their procedures. At first, my tech thought maybe some of the pins in the sleeve weren't aligned and went in and checked / reset the apaptation values but didn't help.

It started out randomly here and there right after the pan / sleeve replacement, then developed into all the time 20-30 seconds, then repeatedly all the time 10 seconds apart. It was frustrating because the tech drove it for days (lives right near me) and he couldn't get it to do it. I even rode with him and it still wouldn't do it. The damn car knew he was in it! One day the car almost locked up the rear from the "hiccups". I brought it right in (3rd time in shop) and said look I can't drive this anymore as I'm worried the rear's going to fall out. They opened PUMA case and good-willed the part with labor by me. I can PM you costs if you want.
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