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BMW 7-Series Maintenance and Repair

750 messages,  Last post on Dec 01, 2009 at 10:55 AM

You are in the BMW 7-Series Forum. Your Hosts are pat & karens

What is this discussion about? BMW 7 Series, Electrical, Engine, Sedan


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#741 of 750
90 BMW 750il, 85K, Transmission/braking problem by 1blackbeauty
Sep 26, 2009 (11:06 am)
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Took my car to the shop for different issue, mechanic called and asked me if my car had problems with the reverse. I told him no. He told me that when he went to back it out of the shop, the car went into reverse fine, then backed up about four or five feet then bound up, as if the brakes were on. Never did this to me. He said I needed to find out what was wrong with the transmission before he would do any more work on the car. I drove it home. Drove fine forward. Did the same thing in reverse in my driveway, went into reverse fine, backed up four or five feet and then bound up and felt like brakes are on. History: Replaced the EH gearbox switches three weeks ago because car wouldn't shift into higher gears, no codes or dash signals but would shift and drive manually perfectly. Had valve box opened up by mechanic who said it was super clean. Thought the problem was electronic. Then changed his mind. Wanted to replace tranny. A different mechanic thought we should change the switches before condeming the tranny first because the switches fail often. So had switches replaced. After replacing switches the car shifted perfectly for three weeks. Now what's up with this? Mechanic thought brake problem but car rolls in neutral. Need a new tranny? Sure don't want to replace transmission and then find it's something else. Anyone else have experience like this? Not sure what to do or who to take it to now. Well maintained, much loved vehicle. Portland, Maine area. Any ideas on what is wrong with this car will be appreciated. Thank you very much.
#742 of 750
Re: 98 Radiator Neck Leak [sysadb420] by DACollins
Oct 01, 2009 (5:32 pm)
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Replying to: sysadb420 (Feb 24, 2009 9:51 am)

I know this is kind of late. If you need an epoxy that is nearly bulletproof. I have used Marintex. Can be found at the better boat shops or marine supply houses. I have used this to repair exterior water leaks on blocks, pumpkin (axle) housings on trucks, etc. GREAT stuff! worth the price. I wouldn't think twice of using it on a filler neck.
Good Luck!
#743 of 750
Shifting hard, oil change interval, check brake linings by DACollins
Oct 01, 2009 (6:27 pm)
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Wow, I wish my wife didn't want a "nice" car for her 40th birthday.
After having the transmission services about 8 or 9 months ago, the surging went away. Shifted perfectly. Recently it started a "bump" when you slow from around 40 mph. Shifts identically on the way up. I am guessing from 4th to 3rd and visa versa. Etek mentions a bad o ring on the 4th or 5th clutchpack? Any suggestions?
Also, The oil change interval light is always on . Cannot get it to reset. Friend with latest Snapon tool couldn't reset it. Any suggestions?
Also, replaced brake pads front and rear, Check brake linings dash indicator still on. Tried resetting - key in #1 pos for 30 sec. nothing. Any suggestions?
Sorry for the list of issues. For such a pretty car, I wouldn't mind if it got totalled tomorrow. (without wife and kids in it of course)
Thanks for any help in advance.
#744 of 750
Re: Shifting hard, oil change interval, check brake linings [DACollins] by blnewto
Oct 02, 2009 (12:24 pm)
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Replying to: DACollins (Oct 01, 2009 6:27 pm)

Sorry for the list of issues. For such a pretty car, I wouldn't mind if it got totalled tomorrow. (without wife and kids in it of course)
I know, seems like there's only a couple ways to deal w/ these vehicles. Buy it new and take the depreciation hit, but at least it has a full warranty. Buy a CPO and take a much less depreciation hit but only have a couple "safe" warranty years. But in both cases the cars must be dumped before the warranty expires. These cars are not meant to be kept after the warranty is up unless you've got a very high level of disposable income (and don't mind being left stranded in the middle of nowhere )
#745 of 750
Shifting hard, oil change interval, check brake linings by DACollins
Oct 04, 2009 (3:59 pm)
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Ok, sorry, brain dead move. The car is an 01' 740il with 155K. Yeah, I know, many of you reading this are groaning too.
Any help with the possiblities of a direction on the transmission would be helpfull.
How in the hell do you get the oil change interval reset? nothing I have tried has worked.
Do I need to replace the sensors for the brake linings to get the light to go off?
Thanks,
Doug
#746 of 750
Re: Shifting hard, oil change interval, check brake linings [DACollins] by 1blackbeauty
Oct 04, 2009 (7:10 pm)
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Replying to: DACollins (Oct 04, 2009 3:59 pm)

You need to go on roadfly- there is alot of information in the archives and you may ask questions of the people there and they'll help you. Don't apologize for your BMW, they are the finest driving machines on the road. Maintain them correctly and they will give you many years of enjoyment.
#747 of 750
Re: Shifting hard, oil change interval, check brake linings [1blackbeauty] by blnewto
Oct 04, 2009 (7:39 pm)
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Replying to: 1blackbeauty (Oct 04, 2009 7:10 pm)

Don't apologize for your BMW, they are the finest driving machines on the road. Maintain them correctly and they will give you many years of enjoyment
Maintain them correctly and they still have a rather disturbing problem of leaving you stranded. Sure they are great driving machines when everything is working as it should, just seems when they hit 100k it's pretty rare that everything still works.
 
#748 of 750
Re: 98 Radiator Neck Leak [DACollins] by sysadb420
Nov 13, 2009 (3:13 pm)
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Replying to: DACollins (Oct 01, 2009 5:32 pm)

Thanks DA. In the end, the epoxy I used actually held fairly well. Occasionally I would get some bubbling and a small leak at the edge of the epoxy, but I was concerned it would fail at some point by cracking more and breaking the epoxy seal (in the middle of nowhere), so I bit the bullet and replaced the radiator.
 
The good news is that the radiator is only $200 for this car, plus about 1.5 hours installation at my local independent shop. So it's one of the more reasonable repairs for this car.
#749 of 750
BMW 740I Computer by justcurious740
Nov 30, 2009 (7:36 am)
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So my boyfriend bought a used 740i back in March with (i believe) 150000 miles on it. Recently (ill say) October his transmission went out. We was lucky enough to have his brother-in-law give us one with less miles on it, i cant remember how many miles though.
 
Any way, So the car is driving perfect but its starting to do the same things before the last transmission went out. Its kinda like the car doesn't know what gear to go in. And lets say he push the gas somewhat fast, it goes but in the middle of it doing that it has like a pause then starts to go again.
 
He thinks it might be the Computer for the car because i believe a mechanic told him so, but We are not trying to spend a whole bunch of money on a new transmission if its just the computer. Do any of y'all might know what it could be?
#750 of 750
Re: BMW 740I Computer [justcurious740] by Mr_Shiftright HOST
Dec 01, 2009 (10:55 am)
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Replying to: justcurious740 (Nov 30, 2009 7:36 am)

Well first off someone has to read the trouble codes that might be stored in the transmission control module or the car's main computer. You can't be working in the dark, you won't get far on these cars.
 
Once we have some code #s, we might be able to point you somewhere that would prove fruitful.

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