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Re: Reving sound in my 540i, 1994 (archive)

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Posted by keith on October 24, 2000 at 12:04:07:

In Reply to: Re: Reving sound in my 540i, 1994 posted by Sandy on October 23, 2000 at 19:29:39:

If it is the normal transmission program, it would delay the upshift from the time you start driving it when cold. If you are driving along and it is not revving and suddenly starts, then this is not normal and is probably a problem with the transmission or the eprom. The cheaper things to try are to have the transmission fluid level checked (could be low) at the dealer and to see if there are any eprom updates for your transmission. I think there were some updates to keep the transmission from "pendulum" shifting (repeatedly up and down) at certain speeds. While at the dealer, they can check for transmission fault codes. If your car has more than 60,000 miles on and has not had the transmission fluid changed, I would advise you to do this. The synthetic ATF fluid is expensive, however, and posts on this board have indicated a cost of maybe $300 to have the fluid changed. However, this is cheaper than a new transmission, if you plan on keeping the car for a long time.

keith
1994 530ia


Thanks, Keith. That's what it sounds like, but what a bummer! It really bugs me when I'm driving along, luxuriating in my 540i and then SUDDENLY it revs for a prolonged period of time. Thanks again,Sandy


This could be normal. When it is cold, your automatic transmission is supposed to delay upshifting in order to hasten engine warmup (reduces emissions). This has apparently been complained about by enough owners that BMW issued a service bulletin explaining that the delay in upshifting is normal - and it does make your engine rev higher.

keith
1994 530ia


Help! No one can help me with this yet and it's driving me crazy (sorry for the pun). When I drive my car, which is an automatic, for about 20 min. of city driving, it gets a sound like the engine is going 120 mph, when the speed has not changed. The dealer said it is not "reving". Someone else said it was only the fan coming on. But the sensation is that it kind of pulls back on me, that it takes more gas (slightly) to get going. Is this normal for a 540i? I really find it annoying--not a really smooth, quiet ride, for sure! Please, please help. Thanks, Sandy






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