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Car Forum / BMW Cars / December 2007BMW 740i Auto transmission problem
Hugh: thank you so much for your reply!!! Let me be more specific: my 1998 740i is an automatic transmission and after I shift from park into Drive and press the accelerator, the car slowly starts moving (not too slowly - if you are a passenger you might not notice how slowly it is pulling away after, let's say, a red light - you might just think I'm a cautious driver) Once the car shifts to what I imagine is 2nd gear everything works fine - the care will have no problem then getting up to 65-80 mph on the freeway. If the freeway is crowded however and I come to a complete stop, then proceed on my way it will again start slowly (in 1st gear). I don't have $6,000 to either (1) get my tranny replaced, or (2) buy another car so the 740i is presently parked in the garage. Thanks again for your insight! Larry (Los Angeles) Hugh: my big question is: can I "fix" this problem or will I have to replace the complete tranny. Thanks!!! larry Hugh: my big question is: can I "fix" this problem or will I have to replace the complete tranny. Thanks!!! larry > Hugh: thank you so much for your reply!!! > [quoted text clipped - 14 lines] > > Thanks again for your insight! Larry (Los Angeles) Probably a worn band. What happens if you select manually? On Dec 16, 12:34 pm, "R. Mark Clayton" <nospamclay...@btinternet.com> wrote: > > Hugh: thank you so much for your reply!!! > [quoted text clipped - 18 lines] > > What happens if you select manually? Mark: thanks for the reply... what's a worn "band" - what kind of band? thanks!!! larry > On Dec 16, 12:34 pm, "R. Mark Clayton" <nospamclay...@btinternet.com> > wrote: [quoted text clipped - 24 lines] > Mark: thanks for the reply... what's a worn "band" - what kind of > band? thanks!!! larry It is a friction device used to change the gear ratio of a planetary gearset.. You can doubtless find out much more by searching the internet for each the terms. Jim On Dec 16, 12:34 pm, "R. Mark Clayton" <nospamclay...@btinternet.com> wrote: > > Hugh: thank you so much for your reply!!! > [quoted text clipped - 18 lines] > > What happens if you select manually? hmmmmmmm. don't know what you mean "select manually". i suppose you mean instead of putting it in "Drive" I should start in "1". hmmmmm, i've never done that. let me try it and I'll post what happens. thank you very much. larry > On Dec 16, 12:34 pm, "R. Mark Clayton" <nospamclay...@btinternet.com> > wrote: [quoted text clipped - 26 lines] > i've never done that. let me try it and I'll post what happens. > thank you very much. larry Not sure which box you have but 5 Speed - might be stuck in snow mode (or even have it selected - I found a Renault in this condition once) starts in third 5 Sp Steptronic - might think it is very cold and have chosen snow mode - starts in third. Either - transmission fault (normally accompanied by display and noises) - runs in third or fourth only and possibly engine power reduced. How are your battery volts. What happens in reverse? > Probably a worn band. Don't think they have such things these days.  Signature*Am I ambivalent? Well, yes and no. Dave Plowman dave@davenoise.co.uk London SW To e-mail, change noise into sound. In article <b6cf43e9-29a9-46a3-8c97-16801bceca90@l32g2000hse.googlegroups.com>, > Hugh: thank you so much for your reply!!! > Let me be more specific: my 1998 740i is an automatic transmission > and after I shift from park into Drive and press the accelerator, the > car slowly starts moving (not too slowly - if you are a passenger you > might not notice how slowly it is pulling away after, let's say, a red > light - you might just think I'm a cautious driver) > Once the car shifts to what I imagine is 2nd gear everything works > fine - the care will have no problem then getting up to 65-80 mph on > the freeway. If the freeway is crowded however and I come to a > complete stop, then proceed on my way it will again start slowly (in > 1st gear). > I don't have $6,000 to either (1) get my tranny replaced, or (2) buy > another car so the 740i is presently parked in the garage. > Thanks again for your insight! Larry (Los Angeles) Are you sure if it is indeed starting in first gear - or changing gear at all? The transmission has a limp home mode where only 4th gear is used. This will give a very slow pull away. But usually accompanied by a warning light or notice - like 'trans fail'. Which is usually an electrical problem and nothing like as expensive as it sounds. ;-) Signature*A woman drove me to drink and I didn't have the decency to thank her Dave Plowman dave@davenoise.co.uk London SW To e-mail, change noise into sound. On Dec 16, 4:56 pm, "Dave Plowman (News)" <d...@davenoise.co.uk> wrote: > In article > <b6cf43e9-29a9-46a3-8c97-16801bcec...@l32g2000hse.googlegroups.com>, [quoted text clipped - 25 lines] > Dave Plowman d...@davenoise.co.uk London SW > To e-mail, change noise into sound. I like the phrase you used, "nothing like as expensive as it sounds"!!! No transmission warning ever came on. I will drive the car tomorrow so that I can answer some of your (and others) questions. once again, thank you very much for you input. larry > In article > <b6cf43e9-29a9-46a3-8c97-16801bceca90@l32g2000hse.googlegroups.com>, [quoted text clipped - 22 lines] > light or notice - like 'trans fail'. Which is usually an electrical > problem and nothing like as expensive as it sounds. ;-) I had that once, day before i was due to leave on a 3k trip around Europe (so was sh.tting me pants). on 96 525 touring.... computer warning, slow set off, but i turned it off and since then (about 15 month and 3x3k trips) its been fine I guess the gearbox is totally differant now, but i heard the electrics were often the problem. Only other problems i had, was it seemed to change up and down, often very quick, on a flat road i drive most days...that was over 12 months ago... a quick question (i dont have a englisch manual for my car) i used to driving on snow and ice, but this my first winter with a auto box. it has S E and * which i know is for ice and bad weather... can someone tell me, when and how to use that ratio/lock.... i have driven in bad weather for 20 years, even in Dresden in a blizzard, but with this auto box, someone told me, pop it in a certain gear and press the * button.. im a little scared, incase i drive in normal mode, and the box shifts a gear and transfers the weight and causes a spin, or i cant move.. I was due to be in Germany now, but i cant find winter tyres here in Sheffield...bllx! > a quick question (i dont have a englisch manual for my car) i used to > driving on snow and ice, but this my first winter with a auto box. it has > S > E and * which i know is for ice and bad weather... > can someone tell me, when and how to use that ratio/lock.... > i have driven in bad weather for 20 years, even in Dresden in a blizzard, > but with this auto box, someone told me, pop it in a certain gear and > press > the * button.. Copied from the Owners Handbook. ________________________________________________ * Winter program. For winter driving conditions. In position D, gears 2-5 only are selected in such a way as to improve traction in wintery conditions. In positions 4, 3, and 2 the selected gear is held. In other words, you can also pull away in this gear, and the transmission does not shift down after acceleration. On inclines or when towing a trailer, for example, it is beneficial to drive in selector lever position 2; in wintery conditions on icy roads, position 4 is recommended for pulling away smoothly with no gear shifts. ___________________________________________________ 'S' as you've probably guessed is the sports programme. Upward shifts are delayed to make more use of the engines power output. 'E' Is the economy programme, or what I would call normal mode. > im a little scared, incase i drive in normal mode, and the box shifts a > gear > and transfers the weight and causes a spin, or i cant move.. Sounds like ideal circumstances for choosing the * winter program. Mike. > > a quick question (i dont have a englisch manual for my car) i used to > > driving on snow and ice, but this my first winter with a auto box. it has [quoted text clipped - 13 lines] > For winter driving conditions. In position D, gears 2-5 only are selected in > such a way as to improve traction in wintery conditions. ah that makes sense.... > In positions 4, 3, and 2 the selected gear is held. In other words, you can > also pull away in this gear, and the transmission does not shift down after > acceleration. ok...then you shift the lever manually for what you want > On inclines or when towing a trailer, for example, it is beneficial to drive > in selector lever position 2 thats a low ratio? or is it high...always get them confused! ; in wintery conditions on icy roads, position 4 > is recommended for pulling away smoothly with no gear shifts. why 4th? isnt that a 1-1 ratio? > ___________________________________________________ > > 'S' as you've probably guessed is the sports programme. Upward shifts are > delayed to make more use of the engines power output. yup i use that often...but i do hate, that i have to build the revs from tick over...not that i can drop the cluth at 5 or what what ever thousand rpm i want too... until this car, for the past 20 years all were manual, from 1 litrle Sunbeams, to 15 years of Celica's, from70's race tuned to other bags of sh.t.....ah i forget about the FSO, abused that to the death. i have hit oil, diesel and ice, in a manual i know what to do, even if it doesnt work out as planned, but in a auto i havent a clue..... i know the touring BMW is heavier, as i have both 525's, and i know manual can beat me off the line, even with less torque, the torque/revs get decent...im just worried about ice and snow, like i was first time in the wet on country lanes.. i havent used the 1 and 2 settings yet in 14 months, i used too in Capri's but darent now. > 'E' Is the economy programme, or what I would call normal mode. me too, i drive my my old man! > > im a little scared, incase i drive in normal mode, and the box shifts a > > gear > > and transfers the weight and causes a spin, or i cant move.. > > Sounds like ideal circumstances for choosing the * winter program. > Mike. thanks, wasnt too sure how to engage it correctly. still not too sure....how do i go down a fecking steep 1 in 3 like i did in a old Marina when i learnt to drive!! Once had to go up a steep hill in reverse, in a Humber van, cos thats the lowest ratio it would go, 1st wouldnt make it (somwhere in Rippon or N Yorks IIRC) I remember a couple of years back in E Germany, i saw loads of Mercs and other stuff just going sideways.....and all the little cars overtaking, i knew it was more about the drivers that car, cos i never got stuck (i did, but i could get out of it) but here, 1st 5mm of snow and all the friggin roads come to a standstill...i even had the fattest low profile tyres on a RWD 77 GT and could go where i wanted...even if slow and took me a few attempts I should have been in Cottbus now, but i couldnt get winter tyres, and im too old to doss in the car now....esp with my back! On Dec 17, 4:04 am, "Jules" > yup i use that often...but i do hate, that i have to build the revs from > tick over...not that i can drop the cluth at 5 or what what ever thousand > rpm i want too... Step on the brake, step on the gas, release brake. That'll have a similar effect. > until this car, for the past 20 years all were manual, from 1 litrle How old are you? > i have hit >oil, diesel and ice, in a manual i know what to do, >even if it doesnt work >out as planned, but in a auto i havent a clue..... Does "not as planned" mean you lose it on a roundabout and damage the wheel and suspension? :-) > On Dec 17, 4:04 am, "Jules" > > yup i use that often...but i do hate, that i have to build the revs from [quoted text clipped - 3 lines] > Step on the brake, step on the gas, release brake. That'll have a > similar effect. doesnt that put a strain on something? > > until this car, for the past 20 years all were manual, from 1 litrle > > How old are you? almost 37 > > i have hit > >oil, diesel and ice, in a manual i know what to do, >even if it doesnt work > >out as planned, but in a auto i havent a clue..... > > Does "not as planned" mean you lose it on a roundabout and damage the > wheel and suspension? :-) If you on about what i think, it wasnt a round about, but one of those traffic light controlled large islands straight off a dual carrageway. and the tyre blowing pulling me off wasnt part of my plan. >> In positions 4, 3, and 2 the selected gear is held. In other words, you > can [quoted text clipped - 3 lines] > > ok...then you shift the lever manually for what you want The idea being that there is less torque when pulling away in the higher gears. >> On inclines or when towing a trailer, for example, it is beneficial to > drive >> in selector lever position 2 > > thats a low ratio? or is it high...always get them confused! Think of it as a manual box. 'D' being 1st gear or low ratio. Lever position 2, 2nd gear, and so on up to 4th. 5th is automatically selected at speed, unless inhibited by the * function, and is top gear. > ; in wintery conditions on icy roads, position 4 >> is recommended for pulling away smoothly with no gear shifts. > > why 4th? isnt that a 1-1 ratio? Maybe, but unlike a manual box, the torque converter allows it to be used to pull away from a standstill. Higher gears give less torque. 4th least of all, so there's less likelyhood of losing traction when pulling away or accelerating on a slippery surface. It is also high enough for for the lower top speeds you will be doing on ice or snow. >> 'S' as you've probably guessed is the sports programme. Upward shifts are >> delayed to make more use of the engines power output. > > yup i use that often...but i do hate, that i have to build the revs from > tick over...not that i can drop the cluth at 5 or what what ever thousand > rpm i want too... I tend to only use it when I'm following a vehicle I intend to overtake. If you're cruising along in top gear at say 40-50mph, and floor it when you wish to overtake, the box will change from 5th to 3rd. Switching to 'S' mode before you overtake changes the gear to 4th, making the change to 3rd slightly quicker. > until this car, for the past 20 years all were manual, from 1 litrle > Sunbeams, to 15 years of Celica's, from70's race tuned to other bags of > sh.t.....ah i forget about the FSO, abused that to the death. i have hit > oil, diesel and ice, in a manual i know what to do, even if it doesnt work > out as planned, but in a auto i havent a clue..... Do the same as you would in a manual. I too have more experience in driving manuals, almost all RWD. I find taking ones foot off the accelerator gives similar results in an auto as it does in a manual on slippery surfaces. Maybe even better in an auto as there is less engine braking, so less likelyhood of engine braking itself to cause the skidding to go from one provoked by excess power, to one provoked by rear wheel braking from the engine. > i know the touring BMW is heavier, as i have both 525's, and i know manual > can beat me off the line, even with less torque, the torque/revs get > decent...im just worried about ice and snow, like i was first time in the > wet on country lanes.. i havent used the 1 and 2 settings yet in 14 > months, > i used too in Capri's but darent now. There's no reason not use 1 and 2, but there's little point unless you specifically need to. The auto box will still change up to a higher gear once peak revs are reached, whatever gear you choose. The 'S' setting will give a similar result to pulling away at the '1' setting. On ice and snow forget about the fact that it's an auto. Use the throttle to control your speed. Let the auto take care of the gears, and drive just as you would in a manual, and at the same speed as you would consider safe with a manual. >> > im a little scared, incase i drive in normal mode, and the box shifts a >> > gear >> > and transfers the weight and causes a spin, or i cant move.. If you're driving gently in ice or snow, any shift will be almost imperceptible, and very unlikely to cause any imbalance. I've been driving autos since 1988. Many times on ice and snow, and have never experienced any problems caused by unexpected gearshifts. In fact I find it quite an advantage not to have to be concerned about gentle use of the clutch when changing gear. >> Sounds like ideal circumstances for choosing the * winter program. > thanks, wasnt too sure how to engage it correctly. still not too > sure....how do i go down a fecking steep 1 in 3 like i did in a old Marina > when i learnt to drive!! You do that by using the 1, 2, 3, or 4 setting, or if the hill is particularly slippery, I would use the * setting in 4th to reduce the engine braking, and use the brakes on their own. On very slippery surfaces 4 wheel braking is more effective than engine braking which on it's own can cause driven wheels to slide. > Once had to go up a steep hill in reverse, in a Humber van, cos thats the > lowest ratio it would go, 1st wouldnt make it (somwhere in Rippon or N [quoted text clipped - 8 lines] > RWD 77 GT and could go where i wanted...even if slow and took me a few > attempts In general thin tyres are better on ice, snow, and in heavy rain than the fatter profile tyres on larger cars. I remember an account of a guy driving a Porche in a heavy rainstorm on an autobahn, who was overtaken by a 2CV, and couldn't keep up with it because his car started to aquaplane when he tried to go faster. I seem to have repeated myself a few times but can't be bothered to correct it. I'll leave you to pick out the salient points. :-) Mike. Thanks Mike, i had read and will try to remember, cheers for taking the time to write it all! > >> In positions 4, 3, and 2 the selected gear is held. In other words, you > > can [quoted text clipped - 119 lines] > I'll leave you to pick out the salient points. :-) > Mike. > a quick question (i dont have a englisch manual for my car) i used to > driving on snow and ice, but this my first winter with a auto box. it > has S E and * which i know is for ice and bad weather... > can someone tell me, when and how to use that ratio/lock.... > i have driven in bad weather for 20 years, even in Dresden in a > blizzard, but with this auto box, someone told me, pop it in a certain > gear and press the * button.. On my last BMW which had this it inhibited changes completely once you moved the lever out of drive. In other words put it in '3' and it would start in third gear and stay in it regardless. Signature*"I am " is reportedly the shortest sentence in the English language. * Dave Plowman dave@davenoise.co.uk London SW To e-mail, change noise into sound. |
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