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6stringgirl 09-29-2012 06:17 AM

What does this code mean?
4F8F Ratio monitoring, gearshift 3 - 2

rebel.ranter 09-29-2012 10:43 AM

Have a read of this answer:


alright let me tell you that the fault you have is for the 3rd gear shift solenoid. i find it unlikely that the solenoid on both cars you own, have the same problem. i would be more likely to think and look at the mechatronic sleeve, which is a fancy name for a plastic transmission connector. these ARE very problematic on all of the later model bmw's. i would have someone, or you look at this. you need to get the car in the air, and there is about a 27mm plastic sleeve coming out of the front passenger side of the transmission, that has a bunch of little electrical connections going through it. if you unplug the connector, you can tell if any transmission fluid is leaking out of it. if so you need to replace the mechatronic sleeve. part number is XXXXXXXXXXX and list price is $19.24. when doing this you need to catch any fluid that drains out of the transmission and KEEP it. when finished pump that fluid back into the transmission, and top off the transmission with new fluid, which is bmw number 83220142516 and list price is $31.76 per liter. this fluid is shell m1375.4 oil and is special to the vehicle. hopefully this information is helpful to you. thanks in advance ed.

Read more: 2004 bmw 525i: give meaning for this dtc . - JustAnswer

6stringgirl 09-29-2012 10:57 AM

Rebel thank you for the reply! I did have the sleeve replaced and all after an initial warning light came on (not sure of that code but I have requested it), but a few miles down the road after the repair it got "stuck" in gear and that transmission warning light came on again. The tech said that was the code the 2nd time. It's not running very well or horribly right now but something isn't right. He just said I need to replace the transmission but I would think he's suggest that prior to the sleeve repair?

Frenchyrider267 10-14-2012 11:04 AM

I was under the impression that if you added other fluid to the tranny that it would be tranny suicide....? Basically making it worse than it is....

Yorgi 10-14-2012 07:22 PM


Originally Posted by Frenchyrider267 (Post 7133472)
I was under the impression that if you added other fluid to the tranny that it would be tranny suicide....? Basically making it worse than it is....

That applies to completely replacing old fluid with new fluid on a high mileage transmission. When working on transmissions the mechanic captures and re-uses the old fluid then tops up with new fluid.

Frenchyrider267 10-16-2012 01:32 AM

My, 2004 525i has 107k. For a 2004 that's not high mileage, however, 107k is high mileage. I just don't want to change the freakin oil and filter if I don't have to.

Frenchyrider267 10-16-2012 01:36 AM

I was actually told by a guy in one of my other threads to do a software update AFTER I change the trans oil and filter. So I'm confused. Should I or shouldn't I change the trans fluid/filter?

Yorgi 10-16-2012 04:58 PM

This is my take on the subject.

It is almost impossible to prove the pros and cons of changing oil vs leaving it in there. I have talked to several mechanics and one tranny guy about the subject and they all basically agree that you should change it regularly (60K miles or less) and to leave it alone if the regular changes were not performed and the car now has high mileage on it.

bobmitx 04-06-2017 07:18 AM


Originally Posted by rebel.ranter (Post 7103793)

Pls can we have video demonstration of this?

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