2.7 Automatic Gearbox Jerk

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harpau01
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2.7 Automatic Gearbox Jerk

Postby harpau01 » Fri Mar 31, 2017 3:29 pm

Apologies if this issue has been discussed, but I have search many threads looking for a solution to my issue. There are a lot of threads discussing similar symptoms, but not quite what I seem to be experiencing. My S-type is a 54 plate, has done ~95K miles and is by far the best car I have owned, apart from this particular issue which makes it impossible, and very dangerous, to overtake the likes of a caravan on an A road.

The symptoms of what seems to be a transmission jerk occurs (almost like being rear ended) when in motion and when the car exceeds ~2.5K rpm. This used to send the car into restricted performance mode, switching the turbos off and the car slowly starts to loose speed and power. I could restart this easily by pulling over and restarting the engine. The restricted performance mode would bring up the following fault codes:
- P0046 - Turbo boost control solonoid - circuit range performance
- P004B - Turbo boost control solonoid B - circuit range performance
- P010F - MAF(or volume) sensor A/B correlation

Judging from these fault codes my first step was to get at the MAF sensors and give them a clean, one of them was particularly dirty. Since doing this, I am still experiencing the same symptoms, but the car does not enter restricted performance mode and the fault codes no longer appear.

My next step was to get the gearbox serviced. The automatic gearbox specialists changed the oil and sump, but they did not give the gearbox a reflash, like I have seen mentioned in a few other threads. Symptoms still remained after this.

My latest project, thinking that there was something amiss with the airflow, was to blank off the EGR valves. Symptoms still remain.

I continue throwing money at this car, my friends think I am insane and tell me to buy something like a new Ford Focus with a warranty. But I couldn't live with myself If I were to do that. So now I'm looking to the gearbox again, unless anyone can shed some light on this for me.

Many Thanks

Paul

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J44EAG
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Re: 2.7 Automatic Gearbox Jerk

Postby J44EAG » Fri Mar 31, 2017 3:47 pm

A reflash after an oil service is important, Paul.

It gives you the latest software and a good gearbox man will set up the car on the road with a laptop to ensure you have a gearbox which operates within correct parameters. In my experience this action is mandatory. Properly set up, the ZF6HP26 is a brilliant gearbox. If it is out of limits, it can be very problematical.

See this well known link. "The Lurch".com details what other owners have experienced and offers some fixes.
https://www.google.co.uk/url?sa=t&rct=j ... 5232,d.d24

As regards the turbo fault codes, you need to get the car to a local independent Jaguar repair workshop where they will of seen these faults many times and know what is needed to get your car working properly again.

Where are you in the country? If you tell us that, we may be able to point you towards a well known and effective repair garage.

For all faults, there is a cause and an effect. Find the cause, fix it and the effect disappears.

Mike K
X350 Co-ordinator

2004 XJR

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Montana5
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Re: 2.7 Automatic Gearbox Jerk

Postby Montana5 » Sat Apr 01, 2017 3:16 pm

Did your Autobox specialist use the corect ZF Lifeguard 6 oil, many so called experts don't and claim to use an equivalent oil, many S Type owners who have unfortunately been fooled into thinking its ok to use the wrong oil, have gone on to describe the following symtoms...Banging into Gear, Slipping, Kicking and Lurching, thess faults were all fixed after replacing the oil with the corect ZF Lifeguard 6.

Here is just one quote from someone I know on Facebook who allowed his specialist to use the wrong oil...
"Use the correct oil Lifeguard 6. I didn't and the box banged into gear. Changed it to Lifeguard 6 and all was well. 6 litres will come out when removing the sump leaving 3-4 in the torque converter and oil cooler. ZF say that is ok. I changed all 10 of mine using a transfusion machine."

Doug.
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S Type Forum Moderator
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J44EAG
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Re: 2.7 Automatic Gearbox Jerk

Postby J44EAG » Sat Apr 01, 2017 4:21 pm

Spot on advice from Doug.

I`ve written an article on the differences between an oil service, ie filter and Lifeguard oil and also defined the transfusion technique which is known as an oil change. Many do not know the difference. I`ll ask Nigel to bring that article up to the top of my pile and publish it as soon as possible.

ZF recommend 60k mile oil services at each 60k mile accumulation. The specialist I occasionally use tells me that is in his experience effective in keeping a gearbox in good condition.

Mike
X350 Co-ordinator

2004 XJR

harpau01
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Re: 2.7 Automatic Gearbox Jerk

Postby harpau01 » Mon Apr 03, 2017 8:59 am

Hi Mike,
Thanks for the reply. I am currently residing in the Wolverhampton area of the West Midlands, if you can recommend a reliable garage that can reflash my gearbox it would be very much appreciated.

Doug,
I didn't realise the oil type would have such a huge impact on the gearbox performance. Unfortunately, I don't know what type of oil the mechanics used to refill it, but I think I may have to give them a call and query it after what you have mentioned.

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J44EAG
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Re: 2.7 Automatic Gearbox Jerk

Postby J44EAG » Mon Apr 03, 2017 10:45 am

A Main Dealer can do a gearbox re-flash.

Similarly a good accredited gearbox re-conditioner or a local independent Jaguar repair facility. Not being local to your area, I can`t personally advise. Google might turn up something near Wolverhampton.

Mike K
X350 Co-ordinator

2004 XJR

jeff1954
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Re: 2.7 Automatic Gearbox Jerk

Postby jeff1954 » Mon Apr 03, 2017 6:19 pm

Paul All good advice here, changing the gearbox oil is a fairly expensive job so I presume you got an itemised bill of the work done. Does it say which kind of oil was used.If the correct oil was used I would definitely recommend a re flash.
I had mine done in 20012 and it cost £372.17 inc VAT just out of interest how much was you charged.

Jeff
S Type 2.7d SE Auto

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J44EAG
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Re: 2.7 Automatic Gearbox Jerk

Postby J44EAG » Mon Apr 03, 2017 8:54 pm

Thats a pretty fair price for the time.

My oil service, ie new sump filter pan, cable connector sleeve, oil and reflash was carried out by Tom Lenthall in September 2015 for £340 plus VAT. I was happy enough with that and was able to sit with the laptop on my knees whilst Adam Price, the engineer took the car out on the road and coaxed the gearbox into its working parameters. An excellent job done.

Mike K
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2004 XJR

kfoster
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Re: 2.7 Automatic Gearbox Jerk

Postby kfoster » Tue Nov 28, 2017 3:22 pm

I am hoping somebody out there can advise me....
We have a 2006 2.7 S Type which has recently started to bring up the "Gearbox Fault" warning, preceded by a noticeable clunk and then restricted performance...This can cleared by simply stopping and restarting the engine, but yesterday the problem occurred three times in a short journey, so clearly it is now time for action..

I changed the gearbox oil and pan myself about 12000 miles ago using the correct ZF oil, but did not get the 're-flash' done.

Is it likely this is causing a problem? the box has been fine until recently...

Can anyone recommend a reputable transmission specialist in the Hertfordshire area??

Many thanks
Kelvin Foster

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J44EAG
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Re: 2.7 Automatic Gearbox Jerk

Postby J44EAG » Tue Nov 28, 2017 6:38 pm

The re-flash is quite important after an oil service. That might or might not be the cause of your issue. I`d suggest a trip to a dedicated Jaguar Independent operator locally. A Google search might turn up a local gearbox specialist or Jaguar Indy close to you.

Mike K
X350 Co-ordinator

2004 XJR

kfoster
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Re: 2.7 Automatic Gearbox Jerk

Postby kfoster » Tue Nov 28, 2017 6:53 pm

Many thanks, I am currently researching a reputable/sensible auto specialist in our locality...

Would a decent gearbox company be able to do the 're-flash' or would it need to be a Jag garage?

Cheers,

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J44EAG
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Re: 2.7 Automatic Gearbox Jerk

Postby J44EAG » Tue Nov 28, 2017 6:58 pm

A good accredited gearbox company specializing in ZF transmissions should be able to do this work. Merc and BMW also use the same gearboxes so servicing and fault finding should be pretty routine.

Mike
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2004 XJR

kfoster
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Re: 2.7 Automatic Gearbox Jerk

Postby kfoster » Tue Nov 28, 2017 7:04 pm

ok thanks,
will report back.

jeff1954
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Re: 2.7 Automatic Gearbox Jerk

Postby jeff1954 » Sat Dec 02, 2017 6:11 pm

You do need that re-flash after the oil change, but surely if a gearbox specialist does the service they should do the re-flash.

Jeff
S Type 2.7d SE Auto

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J44EAG
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Re: 2.7 Automatic Gearbox Jerk

Postby J44EAG » Sat Dec 02, 2017 8:14 pm

There are various update re-flash patches in existence. Whether a re-flash is needed is probably dependent on the version found on a particular vehicle at service time. If it is found to be out dated, then an updated version is likely to be beneficial. When my car went to Tom Lenthall for an oil service, an update was installed and the car put into service access mode. Then we took the car for a ten minute run during which the engineer had me sit in the passenger seat with his laptop. I watched as Adam drove the car up through the gears and coaxed the gearbox into the required parameters. This was all included in the work charges. The gearbox certainly felt a bit more responsive when I drove the car away.

Mike
X350 Co-ordinator

2004 XJR


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