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Driveshaft tube removal: automatic transmission
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Bryan M  



Joined: 19 Jan 2011
Posts: 37
Location: Tampa

PostPosted: Sun Jul 14, 2013 10:55 pm    Post subject: Driveshaft tube removal: automatic transmission Reply with quote

Hi.
Been a while since I've posted. I've been on other projects and finally ready to move forward with this one.
It's a '79 with automatic transmission. I'm working on the damper plate conversion. I removed the transmission without too much trouble but the driveshaft tube will only slide out about a half inch. I've searched all over for some decent instructions, but no luck. I have seen references to 2 pinch bolts at the spline but there is clearly only one visible. What am I overlooking?
I have not disconnected the shift lever. It doesn't appear to be necessary.
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Kens_74_911s  



Joined: 01 Mar 2011
Posts: 529
Location: Southern Pines , North Carolina USA

PostPosted: Mon Jul 15, 2013 2:16 am    Post subject: DS Reply with quote

Hi I pulled the complete auto trans /damper plate / engine/ torque tube etc from my 82 924 N/A. What are you trying to remove ? You can email me. I still have most of this maybe some images of my pulled parts may help. I did not remove the drive shaft from torque tube and still have the rear carrier plate on the torque tube. All of this was definately different than a normal manal trans that I had done 6 or so times before. Ken

porscheken@nc.rr.com
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99 BMW 328i
81 VW MK1-1.8 GTI, 5 spd Pickup
02 Explorer (wife's)
92 BMW 735iL Parting
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Bryan M  



Joined: 19 Jan 2011
Posts: 37
Location: Tampa

PostPosted: Mon Jul 15, 2013 2:44 am    Post subject: Reply with quote

I'm just trying to separate the torque tube from the bell housing on the engine. The goal is the replace the deteriorated rubber damper with a clutch/pressure plate set up. (keeping the auto, but converting the rubber damper)
Transmission's out; torque tube is loose, but will only move back about a half inch. I can't get it to disengage from the spline.
I will email you. Thanks
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Kens_74_911s  



Joined: 01 Mar 2011
Posts: 529
Location: Southern Pines , North Carolina USA

PostPosted: Mon Jul 15, 2013 2:50 am    Post subject: tt Reply with quote

From what I remember you need to unbolt the flex plate from the large opening in the bellhousing, rotate engine to access all the bolts. Then the engine with flywheel and drive plate will come free. Once that is clear there is a snap ring holding the damper plate to the spline. I may have damper and drive plate reversed either way you need to unbolt/split them.
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Ken - ebay: wandrey1 , *0 , *00 , *01
74 911s widebody
96 BMW 750iL
99 BMW 328i
81 VW MK1-1.8 GTI, 5 spd Pickup
02 Explorer (wife's)
92 BMW 735iL Parting
84,85,86x3,87,944. 82-924,88-924s parted
68, 70, 72, 73, 911~ 70,73 914 past Pcars
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Kens_74_911s  



Joined: 01 Mar 2011
Posts: 529
Location: Southern Pines , North Carolina USA

PostPosted: Mon Jul 15, 2013 3:06 am    Post subject: Auto trans Reply with quote

Sorry may have told you wrong not a snap ring but a compression clamp see this thread where i was trying to figure it out I do remember the spline clamp .
http://www.924board.org/viewtopic.php?p=338704
images in my second post in that thread the first images are 944.
K
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Ken - ebay: wandrey1 , *0 , *00 , *01
74 911s widebody
96 BMW 750iL
99 BMW 328i
81 VW MK1-1.8 GTI, 5 spd Pickup
02 Explorer (wife's)
92 BMW 735iL Parting
84,85,86x3,87,944. 82-924,88-924s parted
68, 70, 72, 73, 911~ 70,73 914 past Pcars
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Kens_74_911s  



Joined: 01 Mar 2011
Posts: 529
Location: Southern Pines , North Carolina USA

PostPosted: Mon Jul 15, 2013 4:13 am    Post subject: yes circlip also Reply with quote

Pinch bolt and item 5 Circlip 17x1. The snap ring won't let you pull it back until you unbolt the flywheel. That snap ring may be a pain to remove with engine in place depending how much of a gap you have. May need to drop the FT of the torque tube down after removing shifter and heat shields. sorry


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Ken - ebay: wandrey1 , *0 , *00 , *01
74 911s widebody
96 BMW 750iL
99 BMW 328i
81 VW MK1-1.8 GTI, 5 spd Pickup
02 Explorer (wife's)
92 BMW 735iL Parting
84,85,86x3,87,944. 82-924,88-924s parted
68, 70, 72, 73, 911~ 70,73 914 past Pcars
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Bryan M  



Joined: 19 Jan 2011
Posts: 37
Location: Tampa

PostPosted: Mon Jul 15, 2013 4:40 am    Post subject: Reply with quote

the square block (#3) is as far as I got before I got stuck. So, to get to the circlip (#5) it appears I'll have to unbolt, rubber disc, the bell housing( and starter); slide it all back as a unit. At that point I should be able to access the circlip and separate the tube from the bell housing.
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Kens_74_911s  



Joined: 01 Mar 2011
Posts: 529
Location: Southern Pines , North Carolina USA

PostPosted: Mon Jul 15, 2013 4:43 am    Post subject: clip Reply with quote

Yes that is the plan. The access cover 18 gives you a large hole to work in, as long as you have enough clearance to get to the snap ring. The torque tube bellhousing may not push back as far as you may like. You may need to drop the Ft. end of torque tube down. Take it one step at a time... Good luck.
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Ken - ebay: wandrey1 , *0 , *00 , *01
74 911s widebody
96 BMW 750iL
99 BMW 328i
81 VW MK1-1.8 GTI, 5 spd Pickup
02 Explorer (wife's)
92 BMW 735iL Parting
84,85,86x3,87,944. 82-924,88-924s parted
68, 70, 72, 73, 911~ 70,73 914 past Pcars
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Bryan M  



Joined: 19 Jan 2011
Posts: 37
Location: Tampa

PostPosted: Mon Jul 15, 2013 10:01 am    Post subject: Reply with quote

Appreciate the help. Will update when I make progress
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Bryan M  



Joined: 19 Jan 2011
Posts: 37
Location: Tampa

PostPosted: Sun Jul 21, 2013 4:37 am    Post subject: Reply with quote

It wasn't as bad as I thought it would be. Once the damper is unbolted (leaving the bell housing connected to the driveshaft tube), it easily slides back for ample access. I was even able to lower the front half of the tube enough to get to the clip. I had a little trouble getting to the clip at first, but then realized I could lightly tap the damper towards the back of the car enough to expose the clip. I will post pictures later for future reference.

Also, since I am converting to the clutch disc set-up I had read that a flywheel for a standard transmission car would be necessary. I removed the flywheel (and exchanged the rear main seal while I was in there) and I don't see a reason to do this. Maybe what I had read applies to a 944, but the clutch parts seem to bolt up. Is there another reason to change the flywheel that I am overlooking?
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Kens_74_911s  



Joined: 01 Mar 2011
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Location: Southern Pines , North Carolina USA

PostPosted: Sun Jul 21, 2013 5:27 am    Post subject: FW Reply with quote

Great progress!

I looked up the 924 flywheel in PET and it showed the same PN for automatic or manual trans. I just cleaned up my 924 flywheel to sell it. Seems a perfect for a manual transmission car since the face was never used.
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Ken - ebay: wandrey1 , *0 , *00 , *01
74 911s widebody
96 BMW 750iL
99 BMW 328i
81 VW MK1-1.8 GTI, 5 spd Pickup
02 Explorer (wife's)
92 BMW 735iL Parting
84,85,86x3,87,944. 82-924,88-924s parted
68, 70, 72, 73, 911~ 70,73 914 past Pcars
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Bryan M  



Joined: 19 Jan 2011
Posts: 37
Location: Tampa

PostPosted: Mon Jul 29, 2013 5:27 am    Post subject: Reply with quote

I've spent the past week(plus) cleaning the transmission and also put in new axle flange seals among other projects I have going.
So today I believe I'm all ready to reinstall the transmission and I realize the driveshaft is spinning freely.
In my conversion, I used a 914 clutch disc only because I had one on hand. The splines on the driveshaft do not quite engage the splines on the clutch disc. I guess this means the 924 disc has (female)splines that protrude further?
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Kens_74_911s  



Joined: 01 Mar 2011
Posts: 529
Location: Southern Pines , North Carolina USA

PostPosted: Mon Jul 29, 2013 5:48 am    Post subject: Reply with quote

Bryan M wrote:
I guess this means the 924 disc has (female)splines that protrude further?

Not sure but remember that spline clamp assembly at engine side. That does stick back into bellhousing pretty far. Are you sure you checked the disk splines against the drive shaft? I know the 944 runs a larger dia drive shaft and spline OD. Not sure how that compares to 914.
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Ken - ebay: wandrey1 , *0 , *00 , *01
74 911s widebody
96 BMW 750iL
99 BMW 328i
81 VW MK1-1.8 GTI, 5 spd Pickup
02 Explorer (wife's)
92 BMW 735iL Parting
84,85,86x3,87,944. 82-924,88-924s parted
68, 70, 72, 73, 911~ 70,73 914 past Pcars
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Bryan M  



Joined: 19 Jan 2011
Posts: 37
Location: Tampa

PostPosted: Mon Jul 29, 2013 7:18 am    Post subject: Reply with quote

I did confirm that the disc splines match up. It slid on like a glove. The driveshaft spline isn't long enough to engage the disc. Or, more likely, the disc spline isn't long enough to reach the shaft .
(I'm going to attempt to include a pic)
http://www.flickr.com/photos/99499989@N07/9388348814/
I have also confirmed that the shaft hasn't moved toward the back of the car.
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Kens_74_911s  



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Posts: 529
Location: Southern Pines , North Carolina USA

PostPosted: Mon Jul 29, 2013 7:53 am    Post subject: c Reply with quote

Did you install a pilot bearing in the flywheel ? I wonder if the drive shaft extends long enough to insert into that area? If there is no pilot bearing engagement and shaft is not long enough all your centering is being done by the location that the clutch disk was locked to when the pressure plate was locked down. That is if you can get spline engagement. This has been done before right, or was it on a 944 where I read about this mod?
K
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Ken - ebay: wandrey1 , *0 , *00 , *01
74 911s widebody
96 BMW 750iL
99 BMW 328i
81 VW MK1-1.8 GTI, 5 spd Pickup
02 Explorer (wife's)
92 BMW 735iL Parting
84,85,86x3,87,944. 82-924,88-924s parted
68, 70, 72, 73, 911~ 70,73 914 past Pcars
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View user's profile Send private message Send e-mail Visit poster's website
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