Car jerk when stopping (E90)
- Thread starter wayneerh
- Start date
pengful
Well-Known Member
Re: Car jerk when stopping (E90)
I think you should do a search first. Topic has been covered many times and possible solutions have been shared.
Or
http://tinyurl.com/6htbmzd
I think you should do a search first. Topic has been covered many times and possible solutions have been shared.
Or
http://tinyurl.com/6htbmzd
Last edited by a moderator:
stanch
Well-Known Member
Re: Car jerk when stopping (E90)
Jus to share my experience with this common jerky problem.
My pre-owned E90 330i has the jerk since day1 I had the car. The jerk didnt really bother me much, but I sent the car to a workshop A for general serive and full check after purchase.
Workshop A told me the rear differential mounting worn out. The car stops but the differential casing mounting being loose get pushed ahead. Seems straight forward, but they told me that BMW sell the whole rear aseembly and dont sell the bushings alone. Inorder to help me save cost, they will hv to customise the bushings for me. The whole rear assembly have to be removed for that job.
Unconvinced, I checked with a BMW parts stockist and they DO sell the mountings alone. I was on the verge of purchasing the mountings when the sales rep told me that the stocks for mountings were moving very slow ie seldom changed.
Sent my car to my regular workshop (not pro-BMW) and asked my trusty mechanic to take a look. He told me its the gearbox problem and nothing to do with the bushings. Decided set it aside1st and later came across the threads in this forum on the jerks.
So, when my car was due for servicing again, Sent my car to a reputable pro-BMW workshop B for general servicing and oil change. Told them about the jerk and they told me they will try re-progamming 1st, and see if it solves the problem. if not, will have to look into the valve thing, worst case, have to change the gearbox. So, I asked them to do the reprogramming. But they were busy at that day and I have to re-schedule for the reprogramming.
A few days of the servicing, ther jerk was miraculously gone w/o the need of reprogramming.
Jus to share my experience with this common jerky problem.
My pre-owned E90 330i has the jerk since day1 I had the car. The jerk didnt really bother me much, but I sent the car to a workshop A for general serive and full check after purchase.
Workshop A told me the rear differential mounting worn out. The car stops but the differential casing mounting being loose get pushed ahead. Seems straight forward, but they told me that BMW sell the whole rear aseembly and dont sell the bushings alone. Inorder to help me save cost, they will hv to customise the bushings for me. The whole rear assembly have to be removed for that job.
Unconvinced, I checked with a BMW parts stockist and they DO sell the mountings alone. I was on the verge of purchasing the mountings when the sales rep told me that the stocks for mountings were moving very slow ie seldom changed.
Sent my car to my regular workshop (not pro-BMW) and asked my trusty mechanic to take a look. He told me its the gearbox problem and nothing to do with the bushings. Decided set it aside1st and later came across the threads in this forum on the jerks.
So, when my car was due for servicing again, Sent my car to a reputable pro-BMW workshop B for general servicing and oil change. Told them about the jerk and they told me they will try re-progamming 1st, and see if it solves the problem. if not, will have to look into the valve thing, worst case, have to change the gearbox. So, I asked them to do the reprogramming. But they were busy at that day and I have to re-schedule for the reprogramming.
A few days of the servicing, ther jerk was miraculously gone w/o the need of reprogramming.
chinweyngee
Well-Known Member
Re: Car jerk when stopping (E90)
Have u found any sensible convincing explanation which comes with a solution. Will be greatful if u can share with me. My experience was similar to yours. The only way to reduce the jerk is to stop no so aggressivlely. One of the WS I visited told me is the wear & tear of the 7 solonoid valves in the gearbox.
wayneerh;620485 said:Thanks
Have u found any sensible convincing explanation which comes with a solution. Will be greatful if u can share with me. My experience was similar to yours. The only way to reduce the jerk is to stop no so aggressivlely. One of the WS I visited told me is the wear & tear of the 7 solonoid valves in the gearbox.
leekokshiong
Well-Known Member
Re: Car jerk when stopping (E90)
Can let me know the pro-BMW workshop B? I tok only PML can do gear reprogramming?
Can let me know the pro-BMW workshop B? I tok only PML can do gear reprogramming?
chinweyngee
Well-Known Member
Re: Car jerk when stopping (E90)
How much is this cost? Any outside WS can do this?
lkm;622934 said:
How much is this cost? Any outside WS can do this?
Re: Car jerk when stopping (E90)
Hmm. I dunno. The LUC is supposed to lock the clutch (obviously) to minimize torque loss in the transmission above certain speeds. If it is always opened, there will be losses all the time, even at highway speeds. FC will go up.
But I guess if you do a lot of city driving, it is ok because you probably won't reach the speed before it locks up.
Hmm. I dunno. The LUC is supposed to lock the clutch (obviously) to minimize torque loss in the transmission above certain speeds. If it is always opened, there will be losses all the time, even at highway speeds. FC will go up.
But I guess if you do a lot of city driving, it is ok because you probably won't reach the speed before it locks up.
lkm;622934 said:
