Asin 6 speed auto - Clunk

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Asin 6 speed auto - Clunk

Post by Sloppysod » 11 Oct 2017, 21:42

My 6-speed auto box on my 2011, X7 has started occasionally to almost 'clunk' into 3rd, the other gears are as smooth a silk, the car has only done 58,200 miles.
So
  • 1, Am I looking at a big problem that will get worse quickly
  • 2, Will an oil change, even though only partial, be of help
  • 3, Can I adjust it via the Diagbox, some thing similar to the EGS box calibration?
Thanks in advance
Stu
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Re: Asin 6 speed auto - Clunk

Post by EDC5 » 11 Oct 2017, 23:17

1. Might be valve block wear due to dirty oil.
2. Possibly, it might stop it getting any worse.
3. Not sure, I believe the adjustment is automatic so it will always self adjust itself back to where it was.
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Re: Asin 6 speed auto - Clunk

Post by CitroJim » 12 Oct 2017, 09:41

Valve blocks are very prone to failure on these 'boxes and replacement of same will resolve. The blocks are expensive at getting on for £500 a pop but replacing them is easy enough. No need to do much disassembly at all and can be done with the 'box in-situ..

It's about all that ever fails on them - so far...

A new valve block invariably transforms them and restores their excellent silkiness...
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Re: Asin 6 speed auto - Clunk

Post by EDC5 » 12 Oct 2017, 15:08

Although my C5 has only done 60k I have taken to changing the oil annually just to be sure. Although knowing that the valve block is only £500 is reassuring as that's much cheaper than the clutch and DMF that will invariably fail on a manual PSA vehicle.
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Re: Asin 6 speed auto - Clunk

Post by GiveMeABreak » 12 Oct 2017, 15:24

As a mater of interest, what is the life expectancy of these boxes - oil maintenance aside, what about the clutch packs and what sort of mileage should one expect out of them. I paid over a grand to have the gearbox on one of my XMs when it just died on the way home one day - managed to get another 20 miles before it died in the shop car park - had to be towed to Swansea to be done.
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Re: Asin 6 speed auto - Clunk

Post by CitroJim » 12 Oct 2017, 15:30

Valve blocks aside Marc, they seem to last very well indeed. I know of them with well in excess of 100K on them and only needing new valve blocks to make them like new again.

They don't appear to have the same ticking time-bombs as the 4HP20 does. Not at this stage of the game anyway...

Things may change as they age but for now, I'd just keep changing the ATF regularly and saving up for a new valve block for when the need arises...
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Re: Asin 6 speed auto - Clunk

Post by EDC5 » 12 Oct 2017, 15:36

I think they're pretty solid boxes, way over spec for the 2.0hdi considering they're used with the C5 V6 and in Volvo D5's. j

I think most of the problem is Citroen saying they're sealed for life to be honest. If it had a front mounted oil cooler then all of the dirty oil could be exchanged in one go which would also be a big bonus.
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Re: Asin 6 speed auto - Clunk

Post by GiveMeABreak » 12 Oct 2017, 15:39

I'm on the good old 6 Speed manual Jim on the C5, so my pennies have already gone on 2 clutches and a DMF! I'll have to check what box I had on my XM....
Ok, seems it was a BVA4 (4HP18) - on my 2.0 Petrol Turbo Prestige.

@ Elis - You've done the right thing - pre-emptive maintenance is essential.
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Re: Asin 6 speed auto - Clunk

Post by EDC5 » 12 Oct 2017, 16:11

I hope so! I changed 3 litres this summer and it was black. I'll change the next 3 next summer and repeat indefinitely. I didn't feel like doing all 9 at once due to the amount of new oil chucked away in one go.

The AM6 isn't a fast changing box (or so reviews say) but I'd struggle to do it manually any faster!
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Re: Asin 6 speed auto - Clunk

Post by CitroJim » 12 Oct 2017, 16:30

The old proverb reckons the cheapest and best maintenance in the long-run is regular and frequent oil changes...

I'd say there was a lot of truth in that old saw...
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Re: Asin 6 speed auto - Clunk

Post by NewcastleFalcon » 12 Oct 2017, 18:02

Longevity of my Aisin .6 speed

Life 1 60,000 miles
Rebuild, new valve body, internal soft parts, and torque converter, external cooler fitted
Life 2 126,000 miles and counting still good

No complaints

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Re: Asin 6 speed auto - Clunk

Post by Sloppysod » 12 Oct 2017, 20:34

Thanks for all the advice chaps, my old 2003 auto had done over 150,000 without any thing done to the box and I was hoping the same for the X7, but alas no. :(
I am away from my PC at the moment and so editing text is not easy.
However, I am very interested in.....
How to change the valve block, is it one block for all gears?
Where to by the oil from and how much, my car is a euro 5, so I will need AW-1 spec and not the Other JS3309 which is very expensive from Citroën and aparently they should not be mixed - Why is it just because of the euro 5 restrictions?.
Also, information about fitting an oil cooler would be great.

Talk about unlucky, steering rack and gearbox in the same couple of months :(

Thanks so far
Stu.
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Re: Asin 6 speed auto - Clunk

Post by EDC5 » 12 Oct 2017, 22:00

I'm not sure about the oil cooler mods to be honest. By sharing the cooling capacity with the engine it means the box is effectively warmed by the engine and gets up to operating temp quicker. I have seen an adapter plate on ebay that replaces the current cooler, so it can be done but I'm not convinced myself.
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Re: Asin 6 speed auto - Clunk

Post by Sloppysod » 12 Oct 2017, 23:16

EDC5 wrote:
12 Oct 2017, 22:00
I'm not sure about the oil cooler mods to be honest. By sharing the cooling capacity with the engine it means the box is effectively warmed by the engine and gets up to operating temp quicker. I have seen an adapter plate on ebay that replaces the current cooler, so it can be done but I'm not convinced myself.

Thanks, however, looking on the service box site I can see where the cooler connects, I think (just under the hydraulic bloc) but I can not find the radiator - mmmm :?:
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Re: Asin 6 speed auto - Clunk

Post by EDC5 » 13 Oct 2017, 00:13

Sloppysod wrote:
12 Oct 2017, 23:16
EDC5 wrote:
12 Oct 2017, 22:00
I'm not sure about the oil cooler mods to be honest. By sharing the cooling capacity with the engine it means the box is effectively warmed by the engine and gets up to operating temp quicker. I have seen an adapter plate on ebay that replaces the current cooler, so it can be done but I'm not convinced myself.

Thanks, however, looking on the service box site I can see where the cooler connects, I think (just under the hydraulic bloc) but I can not find the radiator - mmmm :?:


There isn't a radiator specifically for the gearbox. It's fed water from the main engine coolant loop. the "oil cooler" is actually an oil/water heat exchanger between the gearbox oil and engine coolant.
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