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      11-29-2012, 03:44 PM   #1
Josh1a1h
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335i - want to change gear box and diff fluid. What to use and where from?

I want to do a premature change on these fluids.

I am at 65k

BMW state lifetime....LIFETIME MY ASS

How many liters to the diff and gearbox take?

What oil is good? And where would I get it?

Has anyone done theirs? And noticed a difference?

Cheers Lads
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      11-29-2012, 04:03 PM   #2
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you may find this thread of use
http://www.e90post.com/forums/showth...+gearbox+issue
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      11-29-2012, 05:07 PM   #3
Josh1a1h
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Cheers
I have contacted doughboy
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      11-29-2012, 05:18 PM   #4
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No worries pal, I see your in north london. Im in Finchley.

What garage do you end up using round this way?
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      11-29-2012, 06:29 PM   #5
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I live in maida vale now but my garage is in golders green.
I use a small garage who is a bmw specialist. It is called autoprecision. a small garage under some tube archers.
He does good work for me as he used to park his garage cars on my road I used to live on and I have known him for 10 odd years. He knows his BMWs and charges mates rates.
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      11-30-2012, 07:55 AM   #6
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Unfortuanely... Doughboy only has experiece with Manual Trans... And my 335i is an Auto.

So specs are different.

So anyone can shed some light? Also i head something about the tranny having an integral filter which means the tranny sump needs to be changed too?

Thanks,

Josh
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      11-30-2012, 08:35 AM   #7
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Josh,

See here pre LCI 335i autobox

I recall more knowledgable members than I (Tony E92fan for one) talking about changing the sump on autos

Officially the 'boxes are 'sealed for life' and never need oil changes, but it can only do it good IMO if you 'care' for your car and all.
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      11-30-2012, 08:47 AM   #8
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i had my 325 auto box sump and mechanomic sleeve replaced (it had starting leaking) and oil changed, was about 400, the new sump is v expensive! Hardys in Leatherhead did it - specialist gearbox guys
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      11-30-2012, 08:52 AM   #9
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OUCH EXPENSIVE!!!!

Considering there is a 'Lifetime' thing on these... Couldn't we just benefit by changing out the oil and leaving the sump till i reach 100k and then do the sump and oil change again?

What oil did you use 83?

Cheers
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      11-30-2012, 10:37 AM   #10
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The bill will start with a 4-- for a gearbox change. I will be doing one next year (well the garage will) as it seems good practice.
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      11-30-2012, 01:12 PM   #11
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I just want to change the oil. That should still do some good?
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      11-30-2012, 03:35 PM   #12
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Quote:
Originally Posted by bracken78 View Post
The bill will start with a 4-- for a gearbox change. I will be doing one next year (well the garage will) as it seems good practice.
Ouch!

+1 for a manual - 18 for top quality synthetic oil and 2 for a drain plug. bargan.
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      12-01-2012, 02:15 PM   #13
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Red face

We do a fair few transmission fluid changes ( I'm the service manager for A1BN www.a1bnspecialist.co.uk ) and to be fair the biggest hurdle we kind of come across us telling customers that the fluid is around 19.20 a litre (we buy 20 litre drums from our local BMW dealership) which kind of blows the sealed for life statement to bits otherwise how/why would I be able to obtain the fluid so quickly? For the average car you'll drain it(though not 100% and put around 6 odd litres back in) which means the fluid alone is over 100 with ease add the sump and labour and you're on the 400 mark in some places as stated. Time wise it's a good 1.5 hours to do.

Then you go on to the sump made of plastic there around 165 odd plus the VAT and the filters are integral so you're kind of stuffed re doing a proper job unless you buy the sump. We've seen fair few 3's & 5's with sweating sumps(they seem to go on the offside towards the rear) the annoying thing is its all to common hence getting a sump if ordered before 10am for me means they'll get it for me the same afternoon so again blows the myth wide open re sealed for life IMO.

When we offer this service we also offer the option of updating software On the gearbox side of things to the latest version explaining that in the world we live in various things on modern cars are constantly evolving and it can be a worthwhile exercise to see if an software update is available as it can help elevate some behavioural issues plus various bugs and fixes may also be available within the update that may through time of been discovered.

I'm going to do my 335i soon(purely as I think it's time on age/mileage) but its a worthwhile investment IMO having already of done the software update this can only help.

There is of course nothing stopping you changing the fluid but the full effect may not be gained unless the filters changed but if you see the sumps we see when they start to sweat oil it's almost game over and they'll need changing at some time soon.

Going back to the sump quickly BMW use a plastic sump so I understand there are a few manufacturers using the same gearbox hat have a proper metal sump(a good customer of mine told me this) but I dare say that there maybe some differences re something or other that'll stop one of these being used.... A case for more research I guess.

One thing finally that's really surprised me is how finicky this auto box is in its various applications compared with the more basic version that was on my old E46 330d it's adapts to your driving style with more of a noticeable difference than the older verity of box,which I'm now coming to terms with. I can now accept the engineered amount of slip on my car in the lower gears which although frustrating can as I'm getting used to be be "driven around"

Re the diff TBH haven't come across a car that's had a fluid change so it'll be difficult for me to say but I dare say it'll take a good 1.5 to 2 litres of fluid, it would be cheaper of course than he eye watering Auto fluid price on X5's for instance the recommended fluids around 13 from memory.

Last edited by old grey steve; 12-01-2012 at 02:37 PM.
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      12-02-2012, 06:39 AM   #14
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The other thing that's worth changing is the mechatronic sleeve, as the seals apparently get brittle and start leaking. There are a couple of companies on eBay who stick up service kits for the 6HP19/6HP21 every so often that come with a genuine sump/filter assembly, mechatronic sleeve and fluid (either ZF or Shell branded) for ~200; you can also get it from here for 260.

Once you have the kit, it's just the labour to drain down, drop the sump, replace the sleeve, refit the sump and refill (following the slightly complicated ZF procedure that involves filling, bringing the gearbox to ~35 degrees then checking the level). It's on my list for next year...
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      12-02-2012, 12:48 PM   #15
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Thanks for all your help guys!!! This is certainly a big job for a fluid change. I will definitely consider doing this some time soon, but as my gear changes are silky smooth, I may get it done in a year or so. Other important maintenance issues to take care of. I think power steering pump will come first. May sort my diff out as that it simple enough.

Cheers again and Steve ill prop contact you when I need some work done on the tranny.
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      12-02-2012, 02:17 PM   #16
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Quote:
Originally Posted by Josh1a1h View Post
Thanks for all your help guys!!! This is certainly a big job for a fluid change. I will definitely consider doing this some time soon, but as my gear changes are silky smooth, I may get it done in a year or so. Other important maintenance issues to take care of. I think power steering pump will come first. May sort my diff out as that it simple enough.

Cheers again and Steve ill prop contact you when I need some work done on the tranny.
No worries
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      12-02-2012, 02:21 PM   #17
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I'm assuming that the rear axle is changed by using a suction gun not removing the cover? (because it looks difficult to remove the cover with the diff in the car) and there's no drain plug?

I do have a suction gun but I prefer to do a full drain if possible.

Also, anyone have the specs on the fill/drain plugs for the trans (5MT, 335i) and rear end? I would like to order some magnetic plugs before changing fluid, esp. if I am not going to be able to do a full drain. thanks!
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