2002 4.6is feel like rear ended when stoping

[customattitude]

hello my 2002 4.6is feels great but sometimes not everytime when i come to a stop it feels like i get rear ended any imput plz i just bought it. also has rough starts????

[tomcat]

The "rear ended", lunging, or lurching topic has been discussed many times. I believe it was usually tranny software related, but try searching since I could be telling lies.

Scott

[customattitude]

yes i have been searching and i have read that but for 2004+ years mine is a 2002 could it still be a software update?

[tomcat]

Well, here is an '03 with it. I suppose first order of business would be to reset the transmission memory then drive gingerly. Instructions here.

Scott

[rares]

I had the same problem for the last 2 years untill 2 day ago when I was able fix it myself after spending one month and a half all together in shops,dealers and over $ 900 .They all are tech but without the computers ...the are just a bunch of idiots.Last tech told me that it will cost me $8000 to have the trans replaced.Anyway the problem was w/ the idle speed....when the engine was cold ...no problem the rpm is a litle bit higher but w/ engine warm ...at every stop I was feeling the " rear ended" because the throtle control (inside), before intake mainfold had a lot of gease and dust deposits and the engine couldnt breath at low rpm.The dust got there because they were really careless and slopy when they replace the air filter .Need more info I can help

[customattitude]

ok so how did you figure out your problem when they hooked it up to a computer?? did it throw codes

[jst2878]

I have the same. Could it be heat related? I'm not to sure, but I wish I can solve this problem before I sell her. Maybe then, I will keep her longer

[chilliwilli]

Age old issue...discussed in length on this forum. No permanent fix for 4.6iS...something you'll have to live with.

[customattitude]

i have tryed doing the transmission reset..and didnt help it still does it not everytime but it does it...hmmm i read so many ansewers on here anyone with this issue who has had it resolve??

[zimdude]

I had the same thing with my 05 4.4i

1. Car shifting strangely when I am coming to a stop (see #3 & #4)
2. Experiencing a "kick" when going uphill or accelerating off sleeping policemen, or accelerating from a stop street not from a complete stop (engine revs up a little with no motion proceeded by a 'bang" and a very harsh jerk and then motion.)
3. Car lurches forward from 2nd *to 1st and then again from 5th to 6th gear
4. Its as if the transmission is free wheeling before it finds a gear
5. Occasionally there is a low rumbling/vibrating/humming noise when at full acceleration experienced when overtaking on the freeway, 65 mph onwards when getting close to the redline.
6. When in slow moving traffic (25/35mph / 1,500 rpm / 40mpg) the transmission jerks approx every 15 seconds. Its feels like the brakes are being stabbed intermittently. None of the needles indicate any change whatsoever when this happens.

I took it into my dealership and they replaced the gearbox (remanufactured) free of charge. BMW North Scottsdale is AZ are the absolute best to deal with. I was just out of warranty and they had replaced he transfer case a couple of months prior so there was a sequence of event leading up the the gearbox replacement. They had tried everything including software updates before finally replacing.

I had done a tonne of research and I believe the 05 in particular suffered from this. Changing the gearbox erradicated all my problems