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      08-26-2013, 04:46 AM   #1
mistikempire
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335d crack in gearbox? According the mechanic

I have a 335d automatic which at a consistent speed of say 60-70mph would suddenly go into neutral gear and the power would just drop forcing you to pull over, turn off the engine and start her up again, in which if would the do same problem again.


Have took It to mechanics, read all the codes, changed 400-500 worth of parts an still no luck.

Finally took it down to another mechanic who tested it and said it was the gearbox, he opened the gearbox he said and saw there's some sort of crack there where the oil?? Leaks out and out it loses pressure (something like that, can't remember word for word)

I don't really want to spend anymore, an just wanted your opinions as I really feel tied down with this forever on going problem.
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      08-26-2013, 04:51 AM   #2
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What parts have been changed?
Did the mecanic give you a list of error codes?

As I know on these auto boxes the mecatronics sleave is known to leak oil but this involves dropping the sump to replace a 15 sleave part but as a result you end up having to replace the sump as it has a filter built in and gearbox oil which is about 18 per litre (need approx 7 litres)

Or it can be the gasket around the bottom of the sump has started to leak?
How old is your car and what milege?
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      08-26-2013, 04:55 AM   #3
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Well at first other mechanics read the codes and changed things such as vacuum pipes, actuator valves and exhaust related things.

The car is a 2008 coupe with 64k mileage


Another strange thing is that my previous mechanic said that the problem is in the dpf and that it would need to be removed and programmed and remapped.

This mechanic however is telling me that the dpf has already been removed????
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      08-26-2013, 05:02 AM   #4
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Have you seen oil around the gearbox yourself? or are you gong on by what the mechanic has said?

I would be personally be getting under the car and having a good look around the gearbox to check oil or take it to another reputable mechanic as gearbox repairs can be

With regard to DPF I have known cases where the dpf has been removed and the map that is loaded on is too aggressive can cause the auto tranny to reduce power to prevent damage to it - i.e. if the torque values are set to high etc

There are 2 ways dpf delete can happen - either you take out the old dpf and put a new pipe in or gut the old dpf and refit - anyway you can check?
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      08-26-2013, 05:08 AM   #5
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Sounds like you've been in the hands of some amateur mechanics who have cost you some considerable money already.

I suggest you hop over to www.honestjohn.co.uk and seek out the auto transmission specialists he recommends.
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      08-26-2013, 05:09 AM   #6
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I'm just off to collect my car now from the mechanic as I left it to him on Saturday an he phoned me and told me what I told you guys about the crack today in the morning so will learn more when I go there an talk to him face to face an then come back and tell you guys.
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      08-26-2013, 05:13 AM   #7
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As above i would be wanting to see the oil leak around the gearbox sump before you take any further course of action - if you can find out more details as to whether your car has a dof delete/remap and then take it from there

I would not be trusting to let those previous mechanics loose on the car anymore...
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      08-26-2013, 09:08 AM   #8
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ok guys here is all the right information.
Firstly i would like to say i have been wasting my time with other mechanics who have made me spend over 500 for NOTHING.

This new mechanic seems to know what his doing and can give a garantee.
So this is what he has confirmed with me:

The problem is that there is a crack in one of the clutches in the gearbox, which when going at high speeds oil escapes though the pressure and causes the gears to have a problem hence the reason the car jumps straight back to neutral gear

These are the codes which come up on the reading

4F85 Ratio Monitoring Clutch E
4F83 Ratio Monitoring Clutch C
4F96 Ratio Monitoring Clutch C-E

Also the inside of the dpf was cleaned, not removed (my mistake)

So the solution? I have to find another gearbox to replace my one with, which looks like its going to cost me around 800 for a gearbox and his going to charge me another 450 to fit it.

Was also thinking if i could just get it repaired but apparently would cost nearly the same.
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      08-26-2013, 10:20 AM   #9
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Given the age and mileage of your car, I'd buy the comprehensive warranty from BMW UK at 100/month. Wait a month (30 day period before any claims) and have them repair it all at their cost.

Assuming the car has been fully serviced of course.
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      08-26-2013, 10:29 AM   #10
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I just checked it out now, not sure if the BMW warranty covers gearbox problems
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      08-26-2013, 02:15 PM   #11
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It will cover gearbox issues but beware as these faults are date stamped with frequency and this can be accessed when fault finding and it may come into doubt that you knew about these faults before hand.
Clutch monitoring faults pretty much mean the gearbox is knackered as BMW don't supply repair parts for the ZF gearboxes.Youre best bet may be a ZF specialist who could possibly repair.
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      08-26-2013, 02:28 PM   #12
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would anyone know of an zf specialist within the south east london area??
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      08-27-2013, 02:32 AM   #13
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Quote:
Originally Posted by mistikempire View Post
would anyone know of an zf specialist within the south east london area??
If all else fails I'm pretty sure you can send it back to ZF in Germany for overhaul. There's a guy on here with an Alpina who took his to the factory for a service!
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      08-27-2013, 02:52 AM   #14
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Quote:
Originally Posted by mistikempire View Post
would anyone know of an zf specialist within the south east london area??
You didn't read my earlier post pointing you in the right direction.
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      08-27-2013, 04:55 AM   #15
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Quote:
Originally Posted by Phil325i View Post
If all else fails I'm pretty sure you can send it back to ZF in Germany for overhaul. There's a guy on here with an Alpina who took his to the factory for a service!
Or you could send it here: http://www.recro.eu/en/

They will not only fix your transmission but also make it stronger if you want it to last longer with all that torque.
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      08-27-2013, 06:56 PM   #16
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Found the exact same gearbox on eBay for 550, came off a car the exact same as mine, with the paddle shift, the codes also matched, H6.28 and so.
So hopefully mechanic will fit it in and replace mine when it arrives and that will be the end of a 5 month on going problem, fingers crossed
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      08-30-2013, 02:55 PM   #17
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Baught the gearbox today, just found out that i would need to buy and change the gearbox oil and sump pan.

found it on ebay for around 160-200 for both oil and pump, the ONLY problem is how do i know which is the correct one for my car?? as there are a few with different codes
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      09-01-2013, 04:57 PM   #18
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You don't even need to send the gearbox back to Germany, as there is ZF in Nottingham and I have been told by a guy I know who works there they can repair/rebuild these gearbox.

The problem is bmw want the gearboxes back in Germany and send it to zf over there. Mercedes Benz do the same with parts from us in the uk. It's just a warranty thing between all manufactures
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      09-02-2013, 06:42 AM   #19
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i tried to talk to these guys in notts when my gearbox went and they said they couldnt work on them because they were the commercial truck division ?!
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      09-02-2013, 02:09 PM   #20
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Quote:
Originally Posted by mistikempire View Post
Baught the gearbox today, just found out that i would need to buy and change the gearbox oil and sump pan.

found it on ebay for around 160-200 for both oil and pump, the ONLY problem is how do i know which is the correct one for my car?? as there are a few with different codes
Give these guys a email with you reg and vin number
http://www.incarmotorfactors.co.uk/e...88transmission

They will be able to advise

If you want to double check go onto realoem, type in your vin number and get the tranmission part number for your vin and check it with the kit

I brought the meyle oem kit when I did my transmission oil change highly reccomend it
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      09-02-2013, 05:11 PM   #21
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Quote:
Originally Posted by mistryn View Post
Give these guys a email with you reg and vin number
http://www.incarmotorfactors.co.uk/e...88transmission



I brought the meyle oem kit when I did my transmission oil change highly reccomend it
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      09-03-2013, 07:40 AM   #22
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Hi Mistryn, i have just changed the gearbox oil, filter and also that plastic cover, after my BMQW dealer tried to steal money by telling me it is leaking and my garage told me it was not, but at least I changed the oil and they told me, the oil was burnt and I have around 100k miles on the clock, but I am not sure, if I can tell the difference in the changes......
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