[flash]

frankly, i didn't notice before i sent it.  they told me it was a split tube.  they tried to make it work.  they couldn't, at least not with the super bearings, and subsequently stopped trying to do split tubes.  i was then sent a solid tube.

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[chuaed]

Found out from Black Sea that only 968 torque tubes wil fit a 968. However it appears that the later models came with tubes without the split even though they bore the same part number. Im now trying to get my hands on a used one without the split for the tiptronic. Does anyone on this forum have one available for sale?

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[wildcat]

Having done a little more research, I've discovered some interesting differences between the torque tubes.  First, the tiptronic torque tube in the 968 is the same as the 944 automatic.  Hence no split in the tube. Second for those with the 6 speed, the TT on the  968 has a split in the tube and is 12" shorter than the 944 and as a result is not compatible. This has to do with the bell housing and other factors.  Basically you have to change the whole drive line to use a non split tube.  But then its an exotic sports car and these little challenges are all part of the game. B)     

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[flash]

well..............  i had a split tube.  now i don't.  no other changes.

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[chuaed]

Same here. mine is a Tip and came with the split tube.

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[wildcat]

Don't know what to say, I've seen on other posts that the tube in the 944 automatic and 968 automatic are the same,  and mine doesn't have a split which seems to confirm what was said.  I've looked into the possibility of putting a manual in mine which would require the shorter tube, split tubes being the only ones available.  

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[flash]

i wouldn't have known about this, were it not for what i had to go through, and it looks like my memory is a bit faulty.  i actually had to go back through my emails to find out what really happened.

 

it looks like i was trying to speed things up, and had them working on a tube they already had, while mine was still in the car, and was going to send them mine as a core, rather than wait the transit time for mine to get there.  they then started to build an early 968 tube, which had a split.  they tried and failed to have that work.

 

i then sent them mine, which had no split.  they rebuilt that, and sent it back.

 

the theory is that the early 968s came with a version of the S2 tube, which had a split.

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[wildcat]

So there should be some later model no split tubes out there... which is encouraging.  Thanks for the follow up.

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[Tahoe968]

So there should be some later model no split tubes out there... which is encouraging.  Thanks for the follow up.

I wonder when they changed over.  I.e., starting at what MY or VIN series.

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[wildcat]

I  wouldn't have a clue... mine is a '93. Some other mods done suggest the torque tube was replaced.  Here say from several sources imply this to be the case.  There are also discrepancies in accounts.  For instance one source says the 944 torque tube which is shorter due to its curious automatic which fits the dimensions of the 968 Tiptronic torque tube is not compatible, another says

it is.  The part number for the 968 tip is a 944 number... so few of these beasts were made and the part is no longer available... I don't have a problem with mine, I had a problem with the damper.

I had an ex-Porsche tech look at my TT and he said the bearings needed replaceing. I was a jet engine mechanic along time ago and worked with a lot of bearings, and I concluded nothing was wrong with them.  So far so good...

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[flash]

all of the tube assembly part numbers are 944 numbers, whether for a 944 manual, automatic, or a 968 manual or automatic

 

the bearings won't show any visible signs of wear.  there are 4 of them in there too, so you can't even see them all.  the only time i've ever seen any sign of wear was when the centering collar fell out of one of the bearings.  generally, the only indicator of a bad bearing is a buzzing or vibration at higher rpms, and sometimes a whine

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[wildcat]

My bearings aren't an issue.  The mechanic I spoke of spun the drive shaft in the tube and could hear the whir of the bearings.  Not a crunchy sound, but you could hear them spin.  I don't think this is a problem.  The only sound I get at all is from the damper at about 950 rpm, at 1000 its barely perceptible by 1100 its gone. This is putting a very fine point on it. I've read other threads and the sound is described as resulting from torsion or lack of it, as the drive line needs to be engaged.  FWIW  

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[flash]

i wasn't saying your bearings were bad, but only that you can't tell without removing them.  p.s. - they should be silent.  if you can hear them, they are on their way out.

 

the tip is a vibrating and noisy animal down low.

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[wildcat]

Noted.  I had to put a stethoscope to the torque tube to hear them. I was mistaking a noise from the transmission for the bearings.  The problem of isolating noises with a resonating torque tube. 

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[Porsche968CS]

Found out from Black Sea that only 968 torque tubes wil fit a 968. However it appears that the later models came with tubes without the split even though they bore the same part number. Im now trying to get my hands on a used one without the split for the tiptronic. Does anyone on this forum have one available for sale?

I have a couple of them available but sending them to the States is probably not possible in a cost effective way...

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[wildcat]

I checked on the 944 S2 automatic and the 968 tip and are identical in dimensions etc.   The part number for the 968 is 944.421.012.19,  the S2 has a 944.421.012.02  and .015. 

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[flash]

direct from the pet:

 

the part number for the 968 tiptronic tube is 944.421.107.05  

 

the S2 tube for the automatic is 944.421.107.03, same as the earlier 944

 

the 968 standard is 944.421.012.21

 

the S2 standard is 944.421.012.02, same as the earlier 944

 

 

file:///Volumes/968/968/944%20PARTS/E_944_85_KATALOG.pdf

<div>file:///Volumes/968/968/944%20PARTS/E_944_91_KATALOG.pdf
</div>
file:///Volumes/968/968/968%20parts%20(PET)/968_USA_KATALOG.PDF

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[wildcat]

You checked the Katalog PDF's and I checked on line for what was available.  The 944.421.012.19 was listed for a 968 tip.  And what I'm seeing here is what I saw when I started tracking down the Motronic Computer, the first 6 numbers usually being the same with variations.  So buyer beware as they say but that 944.421.012.02 looks to all appearances be like mine without the split which is why I mentioned it.  This was a german posting. 

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[flash]

i wouldn't trust what you find "online".  there is a lot of bad info out there.  over the years i have found countless pieces of bad info, from what one would think were good sources.  pressure plates are a great example of online sources having the wrong part.  there are more than a few guys here that are pretty pissed they got and installed the wrong disk, though it said it was right in those "online" sources.

 

the katalog is the correct mechanism.  that is what porsche uses, not what is online.  it is referred to as the PET.

 

here is the link, direct from porsche:

http://www.porsche.com/usa/accessoriesan...catalogue/

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[wildcat]

I am aware of the PET and I have gone on occasion Jim Ellis 968 who also has the catalog on-line.   I agree there is much misinformation but I also know part numbers have been superseded sometimes by a similar number and sometimes by a whole different number.  This has happened with sensors, induction coils etc.

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