Hi,

Any help would be greatly appreciated. 2000 996TT Tip with 38000 miles on the clock and it has been dripping a few drops on the floor every month. Due to the minor leakage, I left it untouched and strangely, it stopped completely since 3 months ago. And I was running her fine with zero problem until a few days ago.

On top of the leakage, my maf is also on its way out. I have cleaned it a couple of times and it had always helped but the slow throttle response and abs & psm light still come on once every 2-3 months.

So, now, let me describe the problem with my Tip box. As I was giving it the full beans in 2nd gear last Sunday, it failed to shift from 2nd to 3rd and slippage was felt because the boost and the power was there. The power just wasnt transferred to the wheels. The 4th gear light and the d light were flashing right after that and the warning Tiptronic Emergency Run was shown on the dash. I drove it home gently, just a 3 miles drive and weirdly it drove like it had zero problem and it went through each gear just as healthily and smoothly as before. Except on one hill start moment, the power again felt like it wasnt being transferred to the wheels as well as before. And, I have not drive the car since then.

Having downloaded and read the Porsche Workshop Manual online, I am suspecting it could just be a lack of aft fluid and a plugged filter causing the slip while the maf causing the Tip Emergency Run light.

What do you boys think? I would appreciate it if you could share your advice.

James

 

With the symptoms you describe I think you are going to be looking at a rebuild & new maf.Poss low fluid w/ overheat light & slippage usually spells disaster

 

Hi Sweeny186,

I really hope it is just a sign of low oil and you are being very logical with the codes that will show up as cross referenced. I am going to let the local indi specialist to scan the codes and change the ATF and filter next Tuesday. Frankly, it only slipped once before I drove the car 5 miles home and parked it there ever since. Would my clutch parks have slipped excessively and caused some damage already? My car is running UMZ tune, DV and 200 cell RPI exhaust.

Can the Durametric read Tip's ATF temperature during the AFT & filter change? Also, my local indy is suggesting to use Mercedes Benz ATF and filter. Is that a bad idea? What is the best ATF for my 2000 996 TT Tip?

Thanks a lot for your post!

James

 

Your trans is made by mercedes,so yes use the merc parts & fluid.Have not used a durmetric on my trans so not sure about the reading,but I think it can.Internal slipping is what causes excessive heating of the fluid most of the time,so there was prob. some excess slippage before it was actually felt.Once the pan off to change the filter there should be some clues as to any damage by fluid color, smell & deposits left in the pan.Good luck

 

A very big thank you to you Sweeney186, I really need the luck. The pan will be coming off tomorrow and what should I be looking for in terms of color and smell in the ATF? Should the ATF smell a bit burnt due to the overheat and how much before it is too much deposits?

One more thing, I am still not able to find the part number for the MB722.6 filter. If anyone have this information and wouldnt mind sharing, I would be most grateful for your help.

I am going to post pics and update here as soon as I come back from the garage tomorrow.

James

 

Burnt atf will be generally shading towards black w/ an acrid smell & you should have no more than about a dime size (aprox 10mm) of deposits.Porsche part # for filter is 722 277 009 5.A disassembly of removed filter would be a good idea as well

 

I see, thanks for the suggestion. Should the deposit be stuck to the magnetic caps inside the pan? Am i right to think there are 4 magnetic caps in total? Will the ATF filter seems plugged with acrid smell if it is in really bad shape?

 

Read from durametric, car feels v sluggish and refuses to drive in speed below 10mph. Once it goes up to around 20mph or so it drives fine and not sluggish.

DME
P0102 hot film maf
P0701 tip gear impulsable, transmission slip
P0715 tip supply voltage, speed sensor

Tiptronic
14 speed comparison between n2 and n3 implausible
50 impermissible transmission ratio

5525 Torque transfer disturbed at times

My Indy thinks the above are caused by my bad maf and low ATF level. Please advise what these codes are suggesting. Thank you v much!!

James

 

I would like to add that the Indy said the old ATF fluid still looks reasonably well do not smell burnt, acrid or bad in any way and that there were very minimal deposits. So, now new ATF filter n fluid are going in.

Is the car being fixed the way it should?

James

 

Ps the leak only happens at the oil pan gasket. And that only 3-3.5L of old ATF fluid were able to be extracted from the gearbox.

 

Right you are, Sweeney. I have good news, just got the car back and went for a test drive. The car is back to normal again with up-hill starts and successful full throttle gear changes in any gear. Gear changes are now silky smooth and quick as it was.

The indy said only 3.5 liters of ATF fluid came out of the gearbox during the change and they managed to fill 5.5L back in. Is there anything that I should now watch out for about the gearbox and other parts of the car before it goes wrong?

Have I overlooked something from the fault codes?


Really appreciate for all the help!!!


James

 

Good to hear.Only thing I would be weary of is the loss of 2 ltrs of fluid as the pan gsk is pretty robust.If its fixed great,enjoy your car!

 

Hi Sweeney,

According to the indy's visual check, the leak came from the gasket and it was replaced today. I'm going to keep an eye on the garage floor to see if any more leak is still present.

Thanks for your posts and all the help you provided!

James