"The Lurch" does any of the tranny updates fix it?

[318i318is328i645i745ix5]

Originally Posted by FSETH

It has to be a programming issue if switching to DS solves the issue for most people, right?

It must be programming..it makes sense... why does it occur only in D moded and not in S mode.

I believe (and i am not an expert) the lurch is happening because it is shifting down very late, when the speed is very slow, so the downshift is causing the car to lurch....

In sports mode, it is downshifting at earlier and at higher speed so the transition is smoother and the downshift is actually causing the car to rev higher and slow the car down.

Is there anyway maybe if the downshift in D mode could be programmed to occur earlier or in the same manner as in S mode?

Maybe we are expected to drive in traffic and town in S mode ?

Is there anyone out there who has the lurch in S mode ?

[bigwave2255]

sorry "sunny5280" i did not mean to imply that the fault is not real.

what i meant was that for me, i have managed , for the most part get around it by modifying MY driving style.

i believe as has been stated that it is a programming issue, and BMW should step up and address it.

and im seriously hoping its not an indication of a failing transmission

[440films]

Originally Posted by JAH1

Driven, I will let you know...mine will be reprogrammed tomorrow at Dealer. I have 49,200 miles so sneaking this in under original warranty.

Joe 2006 4.4

Any Update? Did you get the re-program?

This issue has been discussed but most threads end just like this one, un-resolved. Need to follow through fellas...

BTW, I got the kick going up a hill after a stop sign in Sport Mode

[JAH1]

No, in fact it turned into a disaster. The lurch was one of about 6 things that the dealer "couldn't reproduce" or whatever their term for "we aint fixin' it" may be...

So I get in kind of a little interaction with the moron service writer guy (who incidentally didn't realize my car was still under warranty and CPO when we started the day) when he called at end of day regarding services that WERE completed. I asked, "what DID you do?" His response: "windshield wiper inserts" and one other thing. It was classic! I expressed my displeasure and went to get truck.

When I got there he avoids me as you go to a different desk to get paperwork/truck. He had written on the paper that I had "refused recommended services" etc. I threw an absolute sh!t storm in the service area which I believe was witnessed by the owner of the dealership.

I would expound more but I need to go home and start looking at my brake pads (light is on) which I asked about but was missed. Now I am 4 days and 600 miles out of warranty. I believe if I went back I would be thrown out.

Sweet.

[440films]

thanks JAH1, sorry about your visit to the dealership.

[JAH1]

No sweat, I like closure in my threads as well. Incidentally the dealer did say I had the most recent tranny software.

Good luck,

Joe

[Driven]

Sorry to bring this thread back from the dead but I just got my 4.8is back from the dealer today. They reprogrammed and updated all of the software. So far I am still having the same issues as described in the SIB. I drove right back and took the SA around the block to show him and he reluctantly agreed with me. So I will be taking it back in next week for further diagnosis. Will follow up with the findings...

My guess is an internal problem with the transmission, possibly the torque converter going bad.

[MADT]

Ive learnt to live with it! Its definitely an internal transmission fault for sure!

[bmwmmn]

Originally Posted by Driven

Sorry to bring this thread back from the dead but I just got my 4.8is back from the dealer today. They reprogrammed and updated all of the software. So far I am still having the same issues as described in the SIB. I drove right back and took the SA around the block to show him and he reluctantly agreed with me. So I will be taking it back in next week for further diagnosis. Will follow up with the findings...

My guess is an internal problem with the transmission, possibly the torque converter going bad.

Not sure if torque converter is going bad in your case,but from majority of the forum members who experienced lurching including myself (not as severe as some stated) it is internal design and operation of this particular ZF transmission and its software. Try to adapt your driving style especially during start/stop intervals. Please, keep us posted!

Cheers

[MADT]

Originally Posted by bmwmmn

Not sure if torque converter is going bad in your case,but from majority of the forum members who experienced lurching including myself (not as severe as some stated) it is internal design and operation of this particular ZF transmission and its software. Try to adapt your driving style especially during start/stop intervals. Please, keep us posted!

Cheers

Its the transmission slowly failing! That came from BMW mechanical engineer. It definitely isnt certainly isnt internal design and operation.