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Tiotronic slips. Is it?


Freeman

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As you know I understood that my box slips so I have decided to rebuild it, this is due to information that I read on this (my head was nearly chopped when I said that this is normal) forum. In short, when in 4 or 5th gear, ~2000 rpm and constant 40-50mph the engine revs hunts up and down by approximately 200revs, the red LEDs don't change.

As I did not work today I had the time to indulge on various forums and I found the following:

https://www.renntech.org/topic/29054-tiptronic-slip-torque-converter/?tab=comments#comment-153928

To me it seems like the same issue but with a different answer. Maybe this is the reason why the issue (?) was not flag out during the pre buy? Is there a definite answer to this? If indeed this is normal then there is no need to rebuild the box, saving of ~ £3K.

Thank you.

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Take it to an autobox specialist for a diagnosis. Variants of this box are in widespread use and they should be able to pinpoint the issue pretty quickly. You can then either fix yourself or get them to do the work.

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There is a torque converter lock out clutch. On my last Boxster, a 2005 2.7 Tip, you could sense it coming in at quite low speeds on moving off from rest - a sort of half gear change in second gear. And it remained locked up afterwards. Certainly at 40-50 mph. But the S could be different.

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16 hours ago, Freeman said:

Thanks DaveEFI. I have never sensed anything like that, unless it is very cold the car starts to drive on 2ed gear. Will pay attention next time I go for a ride.

Yes - mine started in second unless you use a lot of throttle when starting off. You could also hear the engine at low speeds much more than on my current 987.2.  Dunno why as the early car was very highly specced - this one near basic. But perhaps the extra road noise from the bigger wheels on the 987.2 masks the engine noise somewhat.

On a normal pull away from rest in town, I could easily sense the TC lock coming in. Like a half gear change, in terms of engine revs.

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I have the same problem revs hunting @2000  rpm below 50 mph at a constant no load speed no other warnings no error on obd reader done by Indy so I’m just in the process of a service items filters oil change spark plugs etc 

last oil change prior to my ownership was overfilled so I am clearing out intakes etc replaced AOS just going to change a few seals by the throttle body and maf 

indy mechs say vacuum leak to look for, basically I am doing the basics then ask the Indy to have a look at it again, I said torque motor but they say never known to have a problem with torque I quoted like you Freeman rentech thread, which from my internet search is the only one with the answer, have seen other threads with same problem but no answers

one thing I don’t want is a try this and that spend loads on it etc to find it is torque motor 

I would hope the PWIS reader is able to read inputs outputs of throttle body vacuum pressure’s and torque motor inputs outputs while driving my theory being hopefully you would see  torque motor inputs outputs changing and nothing else 

As far as I’m concerned it’s not the gearbox, I also have a jag XF and on a forum a guy was showing the revs fluctuating on the Rev counter and quite a few said torque motor but need to get basics out of the way first so I can say done that.

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3 hours ago, sa utah said:

Have you drained and refilled with new fluid and a new filter ?    You may want to watch the wheeler dealers boxster episode.  

I read recently that Edd has admitted that they had to replace the auto box in the WD Boxster, they claimed it was just a filter and fluid change for the programme. 

It obvious that they do this, as often you can spot new parts in the final scenes that haven't been mentioned in the show. It's called 'licence'.  I once worked with a guy who had worked in TV and he said that nothing you see on the box is real.

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Oh right.   I knew this was the case with the S2000 they did as I was interested in buying one and the exact car was for sale on eBay.  The list of parts they used was far more that they said on the show !   I never did buy one.  Still on the list though 

 

 

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6 hours ago, sa utah said:

Have you drained and refilled with new fluid and a new filter ?    You may want to watch the wheeler dealers boxster episode.  

Hi sa utah.

Yes, changed oil and filter twice to no avail.

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6 hours ago, kevin450 said:

I have the same problem revs hunting @2000  rpm below 50 mph at a constant no load speed no other warnings no error on obd reader done by Indy so I’m just in the process of a service items filters oil change spark plugs etc 

Kevin450

I am so happy to hear from you although not happy that you also have to spend time and effort. I hope to finish work tomorrow early enough so I can go and check with a specialist, just like you, I have also questioning the idea of a faulty gearbox.

Please keep me posted and I will do the same when I have more information to share. 

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Hi Freeman

kind of good to know you have the same problem we both wish we  didn’t have

the one thing my Indy and I agreed it’s not the gearbox, I am also due a gearbox oil change soon may bring it forward but as far as I’m concerned the trip performs ok, the Rev change never seems to cause a gear change, 

but again it’s one of those things to do to say done that

i was hoping they could drive the car and monitor inputs and outputs didn’t seem to get much back on that idea using Porsche  PWIS obd reader 

that’s a question for the forum can the Porsche obd reader check torque converter etc on the road 

Here are some other related threads you’ve most probably seen them kind of a common problem 

 

https://www.planet-9.com/threads/987-1-automatic-rev-movement.90335/

https://www.planet-9.com/threads/torque-converter-or-valve-body-issue-2007-cayman-987-tiptronic.235223/

http://986forum.com/forums/performance-technical-chat/18068-surging-rpm.html

https://rennlist.com/forums/987-981-forum/837436-boxster-engine-surge-while-cruising-tiptronic.html

https://www.planet-9.com/threads/torque-converter-or-valve-body-issue-2007-cayman-987-tiptronic.235223/ 


I think I’m a few weeks away getting it back to Indy to look at it again, will keep in touch over this matter hope you to specialist I also will look a gearbox specialist 

 

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22 hours ago, kevin450 said:

From the above thread the following provides the answer.

Quote

After a long journey, problem fixed. First tried a rebuild on the valve body..after removal and testing was told it did need rebuilding however that didn't completely solve problems. Moved on to the torque converter and replaced it with a new one (550ish oem new....280ish to rebuild)...long story short, shifts perfect now. About 2500.00 fix but well worth it in my view. All things considered, probably more the torque converter than valve body but having them both done can't hurt a 12 year old car with 75k miles.

Anyway, I have managed to go and see the shop and will take the car to them in 2 months for MOT, service and general TLC as well as full diagnostic. What they plan to do is to connect the car to an all singing & dancing computer then go for a ride. He does not think that the problem is inside the gear itself. He mentioned the valve body and did not rule out the torque converter but will not commit to anything before he checks it all. Will see.

Good luck!

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hi freeman

thats what i need a singing all dancing check are you going to porsche indy or a gearbox auto specialist,  I personally think you can see the problem with good test kit . good they have said its  most probably not the gearbox.

 

 

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Taking to an Indy near me. I will be away for a week and won't be using the car so he can have it and use it as a plug. Might also take to a gear specialist, it seems that there are 2 good shops not too far away, one was suggested by Stuart and the other by Porsche 911 magazine.  In any case the gearbox will have to come down as i want to do the IMS and the gear and engine mounts. 

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On 1/19/2020 at 5:22 PM, topradio said:

I read recently that Edd has admitted that they had to replace the auto box in the WD Boxster, they claimed it was just a filter and fluid change for the programme. 

Digressing slightly, the Mot checker is showing that car is still on the road, does hardly any miles each year and the repeated advisories are about the discs😂

I would love it if it's still that skimmed set.... 

https://www.check-mot.service.gov.uk/?_ga=2.265266824.624223342.1579667943-1285517949.1577126348

(Can't copy full link, plate is W414 HFC) 

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Chances are it’s a third or forth car.  I still mot one of mine and it usually does a couple of hundred miles here and there which really doesn’t merit keeping it but I can’t bring myself to sell it. 
 

The brake skimming thing is nuts I think for the cost of a fresh set 

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21 hours ago, sa utah said:

Chances are it’s a third or forth car.  I still mot one of mine and it usually does a couple of hundred miles here and there which really doesn’t merit keeping it but I can’t bring myself to sell it. 
 

The brake skimming thing is nuts I think for the cost of a fresh set 

If they are bad enough to need skimming, chances are that will take them below the minimum thickness. Vented discs are very different from solid ones. But then these progs tend to advertise services.

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  • 2 weeks later...
On 1/19/2020 at 5:22 PM, topradio said:

I read recently that Edd has admitted that they had to replace the auto box in the WD Boxster, they claimed it was just a filter and fluid change for the programme. 

It obvious that they do this, as often you can spot new parts in the final scenes that haven't been mentioned in the show. It's called 'licence'.  I once worked with a guy who had worked in TV and he said that nothing you see on the box is real.

That would need a reference/link for what Edd has said - its a big omission from him if it is true! I always did suspect that there was more to it than that. There are some videos of the car being bought back to Drew for them to do the "sale" and the car was NOT running at the time of purchase at all - so they took the car away, did work on it, bought it back to do the sale, and thus ensued one of WD controversial episodes.

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2 minutes ago, usman10316 said:

That would need a reference/link for what Edd has said - its a big omission from him if it is true! I always did suspect that there was more to it than that. There are some videos of the car being bought back to Drew for them to do the "sale" and the car was NOT running at the time of purchase at all - so they took the car away, did work on it, bought it back to do the sale, and thus ensued one of WD controversial episodes.

I can't remember where I read it, I'll have a hunt around to try and find the quote.  As you admit that the show is not as it appears when broadcast then why would you doubt that they do work that they don't admit to?

In some instances you can actually see on the finished car things that weren't shown or costed on the programme.  I don't really have a problem with this as it's TV/entertainment and not supposed to be honest.

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1 minute ago, topradio said:

I can't remember where I read it, I'll have a hunt around to try and find the quote.  As you admit that the show is not as it appears when broadcast then why would you doubt that they do work that they don't admit to?

In some instances you can actually see on the finished car things that weren't shown or costed on the programme.  I don't really have a problem with this as it's TV/entertainment and not supposed to be honest.

Yes, I agree there are times when watching it they have done jobs that were not shown, I think it was the boxster on with new radiators not shown - and that would be more useful tbh! 

I don't doubt the accuracy, but, for someone to come out and admit that the program is a bit bogus is something else...

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Quote

 

Have you driven another 3.2 tippy for comparison, you may not realise how bad the box is. I had a 987.1 2.7 tippy which was very responsive and great fun to drive. After I sold it I had a 986 3.2 tippy and the difference was night and day. It had the same symptoms you describe and was very sluggish. I had the oil and filter changed in the box and the mechanic said it was burnt black. The fresh oil actually made it a lot worse so I swapped it out for a good used one which was about £450. My advice would be to carry on driving the car and look for a good used replacement box.

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