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DirtyHarry88

ZF 6 speed transmission issues

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4 minutes ago, JasonH said:

 

So only £400 of parts....and you can do it yourself...but it's not that easy.

 

Add £60 for bushing kit. What's the most difficult part, getting it off the car and putting it back? I know you've done it (Torque converter).

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1 hour ago, lockerman 22 said:

mine started out with the same problem had oil and filter changed (lifelong only) and then over time got worse,  tried Dr Tranny fix did nothing in the end had torque converter reconditioned at Sussex Auto`s and fine since

How much were you to get the torque converter reconditioned including labour for removal and refitting?

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The bridge seals generally only fail in hot climates so I didn't change mine. With all the other mechatronic work before I'd personally leave that part alone in this case.

 

In fact if you don't need to drop the sump to do the torque converter - so I'd leave it on. You're then down to torque converter remanufacture and about 3 litres of Lifeguard 6 to top it back up. Now down to £200 + £60 for parts.

 

In general it's a straightforward job, in my case I didn't remove the Cat and I should have done - it would have been a lot easier.

 

The challenge is the gearbox weighs 90kg and is quite tall so the car has to be lifted high to get the gearbox out - but if only swapping the TC then the gearbox is probably best left under the car.

 

There are various tricky bolts. The main issue is getting the gearbox on and making sure the oil pump drive dog is correctly engaged. Access to the bolts to the flywheel is tricky. But in general being rear wheel drive, it's just a lot of unbolting and bolting back up with some very heavy bits to shift around like the exhaust.

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1 hour ago, lockerman 22 said:

mine started out with the same problem had oil and filter changed (lifelong only) and then over time got worse,  tried Dr Tranny fix did nothing in the end had torque converter reconditioned at Sussex Auto`s and fine since

Sussex auto`s did mine torque sent it off to them reconditioned  187.50 plus vat. I bought ZF Lifeguard oil from them as well 10 litres 147.50. If you close to them they will do the whole job for you at what cost I am unsure of but worth ringing them 01323 848886, if you send it to them they will ask for the number off the side of the box to let you know if they have one already done in stock.

 

Advice?? after the torque converter comes off who ever does it get them to check the flywheel for any faults

Edited by lockerman 22
more advice

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3 hours ago, Blobby said:

 

Nah they don't have enough torque to do that :lol: :lol:.....

 

Seriously it has to be lack of maintenance that BMW say we don't have to do 

 

Lol!

 

So if it wasn't the V8 torque that mangled mine, it can't have been the fact I got mine serviced twice in 91,500 miles either!

 

Mibbies, like N47 timing chains bits of these boxes are made of cheese!

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11 hours ago, Dotcom1970 said:

 

xHP - Me want.  So, how much for a combined engine and gearbox remap?  I need to get my thermostat sorted, then the trip to Chester is a 500 mile round trip.

 

We could take care of that for you too if you wanted!

 

Just give me a shout whenever dude :)

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8 hours ago, DirtyHarry88 said:

Not sure how soon I'll get round to it as the N62 is leaking a fair amount of oil on the drive too.

 

Cylinder head covers.

Vanos units o ring.

vacuum pump O ring.

alternator bracket.

Oil pressure switch.

 

Take your pick as the source of the oil leak on that engine.......

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22 hours ago, 535i Andrew said:

 

Lol!

 

So if it wasn't the V8 torque that mangled mine, it can't have been the fact I got mine serviced twice in 91,500 miles either!

 

Mibbies, like N47 timing chains bits of these boxes are made of cheese!

 

Doesn't your F10 have an 8 speed box, which means newer and made cheaper

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18 hours ago, 535i Andrew said:

 

Cylinder head covers.

Vanos units o ring.

vacuum pump O ring.

alternator bracket.

Oil pressure switch.

 

Take your pick as the source of the oil leak on that engine.......

Yes it seems BMW designed a sieve.

 

I had the oil pressure switch replaced recently and the previous owner had the cylinder head covers done.

 

I noticed there's a bit of a leak on the right hand upper timing cover although not what I'd think was enough to suggest it's the cause of the dripping from the car. MOT is in a week so we'll see what it is then.

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5 hours ago, Blobby said:

 

Doesn't your F10 have an 8 speed box, which means newer and made cheaper

 

Yes it does and it doesn't need 8 speeds. Give me a six speed box back please, just not the one that was in my E60!

 

No ill effects on the newer cheaper 8HP boxes reported so far. Undecided if I should service mine or not given past experience..

Edited by 535i Andrew

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38 minutes ago, DirtyHarry88 said:

Yes it seems BMW designed a sieve.

 

I had the oil pressure switch replaced recently and the previous owner had the cylinder head covers done.

 

I noticed there's a bit of a leak on the right hand upper timing cover although not what I'd think was enough to suggest it's the cause of the dripping from the car. MOT is in a week so we'll see what it is then.

 

Sorry I missed off the timing chain casings, that was the only joint mine didn't have signs of a leak from.

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On 11/02/2018 at 4:30 PM, 535i Andrew said:

 

Yes it does and it doesn't need 8 speeds. Give me a six speed box back please, just not the one that was in my E60!

 

No ill effects on the newer cheaper 8HP boxes reported so far. Undecided if I should service mine or not given past experience..

Interesting you'd prefer a 6 speed. I thought the 8 speed would be ideal for a petrol engine, keeping the engine in the sweet spot for better performance. 
I guess asking or looking on a ZF site for their recommendation.

Edited by Blobby

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1 hour ago, Blobby said:

Interesting you'd prefer a 6 speed. I thought the 8 speed would be ideal for a petrol engine, keeping the engine in the sweet spot for better performance. 
I guess asking or looking on a ZF site for their recommendation.

 

No it has been designed for the 2.0d of which sadly the majority of F10s are.  The 2.0d  has a much shorter useful rev range thus it needs more gears to keep it in the sweet point.  If you have ever driven a manual 520d and you will see what I mean, constant gear changing to keep it going.  An auto is a different beast, 8 speeds and it can stay on the power more and not be embarrassed by everything else on the road

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You tend to get error codes when the gearbox itself needs repair, when clutches between gears are worn and slipping. You can also get error codes when the gearbox oil is low.

 

If the torque converter lockup clutch slips it rarely generates fault codes.

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On 10/02/2018 at 9:30 PM, 535i Andrew said:

 

Cylinder head covers.

Vanos units o ring.

vacuum pump O ring.

alternator bracket.

Oil pressure switch.

 

Take your pick as the source of the oil leak on that engine.......

Mechanic says it is the right hand upper timing cover. Specialist I'd emailed reckons a £900 job as it's best to do the rocker cover gaskets and a few other things while in there too.

 

This level of hassle/bork potential with an M car engine would be pretty irritating. A mainstream one fitted across 5, 6, 7 series and X5 though? Ridiculous.

 

All I can advise to anyone is avoid a car with an N62 in it, absolutely not worth the hassle. I thought I did the required homework too. Only bought the thing for £3800 at Christmas, fucked off.

 

Could it be worth only doing the side that's leaking and hope the left hand lasts a while?

Edited by DirtyHarry88

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Yup it's pricey when they go wrong, and your specialist is right to do other things when you are in there.   I bailed out of N62 woes when I was faced with a gearbox rebuild at trade in value of the car.

 

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2 minutes ago, 535i Andrew said:

Yup it's pricey when they go wrong, and your specialist is right to do other things when you are in there.   I bailed out of N62 woes when I was faced with a gearbox rebuild at trade in value of the car.

 

Do you reckon it could make sense just to do the one side then?

 

As far as I can find online, there's not a huge amount you'd have to repeat if I was to get the other side done at another point- say if the left hand timing cover decides to start leaking. The car's not even done 15k miles (2.5 years) since it had the rocker cover gaskets changed in the first place so I'm not worried about them as such.

 

I see there's also the spark plug tubes that tend to get done at the same time. Surely re-usable given the ones on my car are still pretty new?

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12 hours ago, DirtyHarry88 said:

Do you reckon it could make sense just to do the one side then?

 

As far as I can find online, there's not a huge amount you'd have to repeat if I was to get the other side done at another point- say if the left hand timing cover decides to start leaking. The car's not even done 15k miles (2.5 years) since it had the rocker cover gaskets changed in the first place so I'm not worried about them as such.

 

I see there's also the spark plug tubes that tend to get done at the same time. Surely re-usable given the ones on my car are still pretty new?

 

If it were me, I would be tempted to get it done in one hit. Cheaper in the long run esp if you plan to keep it long term.

 

I'm trying to remember the spark plug tube issue. Mine were dry at 62k ish whenever it was that I changed the plugs, but it was about when the car reached 8 years old I noticed there was a bit of an oily sweat on a few engine parts. The rubber gaskets on this engine don't age well as the ones on the 6 pots which is a pity.

 

I had secondary air issues on mine too which could have been anything from worn valve stem oil seals to the engine case vent tubes and valves which are located deep in the engine bay near the exhaust manifolds and at the bulkhead.

 

If I had more money than sense, (not to mention the experience and equipment) I would have removed both engine and gearbox, sent the box off for a full rebuild and stripped the engine to clean and replace anything that looked suspect. The rest of the car was solid.

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£900 is a lot for me bearing in mind the gearbox is yet to be checked. Clio has just given me a £750  bill too.

 

How much repeat labour are you looking at to do the other side at a later date? The BMW guides I've seen don't suggest it'd be that much.

Edited by DirtyHarry88

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