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#21
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Another E53 owner with a daughter at my kids school tipped me off about a local guy called 'Mike the Mechanic' here in Abu Dhabi who is an X5 owner, as you say - I talked to him today and he said the same about diagnosing problems with engine management and sensors before offering to strip and rebuild the Tranny. I'm also thinking hard about the possible financial consequences (the wife is 60% made up to make me get a Tahoe, I'm sure) but he seems a straight-up guy, so will go for it in the coming week - after pay-day, of course
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---------------------------------------------------------------- 2006 X5 4.8iS (facelift) in Imolarot + Ivory leather & alcantara headliner 1999 E46 323i in Imolarot II + Grey nappa 1990 E30 320iSE Sterlingsilber |
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#22
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I know about that rubber seal, the thing is that lots of the time the battery can get low voltage, corrupting the car's modules. And sometime you cannot even connect to it. I just re-flashed the latest tranny software and this fixed the annoying 1-2 jerk when cold. I would try this first, before dropping the mechatronic unit. If this doesn't do it, then it could be the bridge seal, or low ATF, or clogged filter. Fmugur can chime in, he was there. 0.02
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Stable: e92is, e46 M54B25, e83 N52, e53 N62 - sold, e39 M54B30 R.I.P. |
#23
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What tool do I need to re-flash, how difficult etc? TIA. |
#24
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2004 X5 4.4i 202k on odometer |
#25
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I used Progman SSS. I have the Romanian software (GT1, INPA, Progman etc) and has the latest & greatest. The pdf I linked above contains the details on how to re flash.
If you don't know how to do it, here is a vid how to re program the ABS module (for the programming part, it starts at 4.50 minutes or so). Obviously one has to follow the pdf - the vid is just an example, and you need to pick the correct module (GKE/EGS when prompted for it). And you need patience, because there are moments when you might think nothing happens, maybe the computer crashed, etc. but actually it's working, but it takes time. A good battery charger is mandatory. https://www.youtube.com/watch?featur...&v=vx8FwUCkHys
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Stable: e92is, e46 M54B25, e83 N52, e53 N62 - sold, e39 M54B30 R.I.P. |
#26
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I also have my hunches that BMW introduced after 2006 or so the "battery registration" feature in order to prevent these glitches when the battery gets low. Prior to the "battery registration" there were lots of instances reported where the car would go in limp mode (and I refer to numerous BMW model lineups from sedans to coupes to SAV), or would exhibit other weird behavior, which would be solved with a good or recharged battery. That "battery registration" feature is probably another module or similar that keeps tabs on the voltage of the battery and in certain situations directs the flow of power to the unit/module that needs it most in order to prevent these glitches that can be dangerous in certain situations (think of merging on a Hi-way, and you get the "trans- failsafe" message).
But I can be wrong.
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Stable: e92is, e46 M54B25, e83 N52, e53 N62 - sold, e39 M54B30 R.I.P. |
#27
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here is the pdf on how to change the mechatronic & seals. However, the mechatronic unit usually is fine, the GKE module might lose it's memory and/or get corrupted due to low voltage. I think it was believed the mechatronic was going bad, and in the early stages of fixing the 1-2 hard shift, BMW & ZF might have thought changing the mechatronic unit will solve the issue (which it does, until the battery voltage drops again), but you're out about 1600$ to do that. The pdf is helpful if the square seals are bust and need replacing, which like every rubber they might.
6 Speed Mechatronic Replacement.pdf
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Stable: e92is, e46 M54B25, e83 N52, e53 N62 - sold, e39 M54B30 R.I.P. |
#28
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PropellerHead,
Thank you! I wanted to post a quick note back. Using a bunch of what you posted as motivation and tips my X (2005 x4.8is) is shifting better than I ever knew it could. While I would not have outright said before this that I had a broken transmission but it was clearly not performing as designed and had started to lag more in recent months. No more kicking when shifting from 1st to 2nd. No more hanging in 2nd and 3rd and overall more consistent shifting overall. As a result my driving has is now more spirited. Not crazy but enough so that I'm also shocked for my mileage to have also increased. Yes, no kidding 5% or so. Clearly it was hanging in the lower gears more than I realized. I have had good success with recent steps I took of swapping trans fluid and the parts plastic sealing parts between valve body and trans. All of the plastic tubes were shorter from age 1-2mm. The theory here is high pressure fluid leaks between valve body and trans due to these $20 in plastic parts shrinking. No special tools other than to drop trans pan. Valve body unbolts and drops even easier. My Medtronic seal had a very slight leak too. I also think my overall fluid was low too as it took 7 liters to refill first time and second fluid swap only took 5.5 liters. Trans oil change 7 liters life guard6 (bav auto) dropped pan, new filter (BMW parts counter) dropped valve body New metatronic seal (round electrics plug seal) valve body seal , 4 tubes within trans (BMW) took 2 liters into pan with engine off, took 5 more with engine running, gear shift and 42C Reset trans adaptations Trans shifting much better now Drove a 2 thousand miles and then for good measure changed trans filter and pan gasket 2nd time. Added fluid Zf lifeguard 6, took 5.5 liters at temp 40c Trans resets adaptations again due to new fluid. If I were recommending to someone else I would not recommend 2nd pan drop but I would do 2nd fluid change. Drives much better now. Shifting smooth and quick like I expect from a 2.5 ton sport truck. Here are some other research links I complied looking into this. Zf site directions http://www.zf.com/na/content/media/u...28_Catalog.pdf Zf lifeguard 6 fluid per zf site Amazon $23 Bav auto $23 / liter Welcome to bavauto.com | ZF Lifeguard 6 fluid - for 6-speed automatic transmissions More on our trans Everything about your ZF 6HP26 transmission issues | BMW Logic7 site 6hp26 tear down and history Post 6 here shows the 5 seals (1 rectangle and 4 round tubes) valve body and trans plates ZF 6HP26 Teardown
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2003 E39 530i 1992 MX5 2005 E53 x5 4.8is (sold) 1990 K75S (sold) |
#29
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Oh I forgot to mention one part. I did try the program update you and Duro noted
Transmission software update http://www.xoutpost.com/attachments/...c-software.pdf But I still have to sort out what is up with the version numbers as my 4.8is had the program numbers for the 4.4 in it. Mine had 7564917 on it / sss progman did updated to same 7464917. This was probably good to clear out any corruption too. similar to this video https://www.youtube.com/watch?v=7VZSlrbNo9Q Still puzzled that the part number i have does not match 4.8is transmision (post #7) http://www.xoutpost.com/bmw-sav-foru...-one-them.html I have been thinking to check what programman version I have and then maybe entering in the version number manually instead of auto select.
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2003 E39 530i 1992 MX5 2005 E53 x5 4.8is (sold) 1990 K75S (sold) |
#30
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Great to hear guys. I also have the 1-2 hard shift when cold on the 4.4 and on the 4.8 not too bad but it's there. I will change the gaskets and I hope that fixes it. I added the part numbers. As far as I could find, other than the four tubes all are BMW parts.
new filter BMW part: 24117543550 new oil pan gasket, BMW part: 24117543484 New metatronic seal (round electrics plug seal): 24347588725 valve body seal - BMW part number: 24347588727 4 tubes within trans (BMW) - from the ZF catalog you posted. I believe these cannot be purchased from BMW, only from the ZF transmission parts supplier? 2x BMW 24107519314 ZF 01.050 BMW 24107519315 ZF 01.060, BMW 24107520715 ZF 01.064 Note: I found and added the BMW part numbers for the ZF SEALING SLEEVE
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4.8is 2004 imola red 4.8is 2005 Black on Black - DINAN/2 sold 4.4 2004 X5 2003 330xi 2008 328xi - sold 4.4 2000 X5 - sold Last edited by fmugur; 08-30-2015 at 11:31 PM. |
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