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RE: [T3] AT to MT conversion


Hi 

Some comments on Daves conversion as opposed to mine - My car is about 68/69
& was a Fasty before I took the roof off. I have added my comments under
Daves.

The first thing I did was to cut the old pan open on the bottom the whole
length of the pan to reveal all of its internal components and positions.

  >> I did the whole conversion with the body on the car -I Jacked the car
up as high as possible (all 4 corners), pulled the engine & the Auto box,
removed the shift mechanism, bowden auto shift cable & pedals. (NB in South
Africa we drive on the left hand side of the road (the Brits once colonised
us) so the car is RHD) 

1. The rear subframe from the '65 bolted onto the '68 pan without a problem.

 >> I left the sub frame as is. It has a box stiffener on it.

2. The clutch tube is welded onto the pan 3 places: onto a cross member
within the tunnel in front of the stick shift, at a point in the centre
where the rear subframe is bolted, and onto a small bracket where it exits
the pan at the rear.

 >> I got similar info from cutting up a wrecked beach buggy pan that I got
from a friend.

3. Even though the '68 was an AT it still had a cross member in the tube to
which the clutch tube is welded so I did not have to create a new cross
member.

>> See number 1. I think mine is actually a 68. Could be a 69.

4. I cut about 26" of the top, front part of the tunnel from the '65
(old) and the same in the '68 (new). This gave me the room to weld the
clutch tube into the front cross member as well as gave me the pickup points
for the stick shift. I'll but weld the section from the
'65 into place on the '68 which will give me the MT shift in the proper
location.

>> I got the tube in as follows. 
 I first opened the hole on the underside of the pan (where the shift
connects to the gearbox with the flexible joint). Then I took out the spare
wheel well & opened the inspection cover on the front of the tunnel (behind
the front suspension). 
 I made up the tube from a piece of hydraulic tubing with a half washer
brazed on the one end. (The washer fits in the half round in the small cable
support bracket/cross member that is in the tunnel. Even though my car was
an Auto this bracket was fitted). 
 I then made up a right angled tube clamping bracket which I fitted inside
the tunnel through the shift mechanism hole. I attached it to the tunnel by
pop riveting from the outside. 
 I then drilled an exit hole (± ² inch) in the back of the pan next to the
fuel line. I got a rough idea of the positioning from the manuals I have.
 After all this I fed the tube in from the front (same way as you get the
shift rod in). It went through my clamping bracket & out the back . I pulled
it hard up against the cable support bracket/cross member in the tunnel &
then clamped it using the clamp I fitted inside the tunnel.
 I brazed a big washer to it & the suspension cross member where it exits to
the gearbox. (CAREFUL HERE AS YOU ARE RIGHT NEXT TO THE FUEL LINE)  
       
I then turned my attention to the shift rod, This was a straight bolt in - I
was surprised to find the manual shift assembly & plate bolt right into
where the auto one came out. Straight out of the manual (Haynes). The pedals
are also a bolt in. Mine were a set from a manual car (NB RHD!) Fitting of
the clutch cable is an exercise of patience.

After all this I fitted the engine & box as a unit, Then I cut the clutch
cable tube to length & fitted the length of flexible cable. After all this I
found the driveshafts don't fit...............

These are the parts I can think of that I used from the M/T car
1. Gearbox with back mounting.
2. Complete shifter (all the plates, covers etc - make sure you get
everything))
3. Pedal set - (I think mine may actually have been from a beetle)
4. Shift Rod
5. Shift rod to gearbox joint
6. Flywheel clutch & pressure plate
7. Shorter gearbox bolts for top of transmission. 
8. Flexible cable from gearbox to clutch cable tube.
9. Clutch cable.

The photos on Matt & Daves website would be very very useful even if you do
the conversion with the body in place. 

By the way Dave I have a cat that looks almost the same, only a bit fatter. 

Ian




There are  some photos of this on the Dave and Matts' website.
http://www.hkin.educ.ubc.ca/sanderson/Personal/Revival/Revival.html

Always happy to answer questions.

Dave
--
David J. Sanderson
2059 Graveley Street, Vancouver B.C. V5L 3B6 day (604) 822 - 4361 eve (604)
255 - 4935
  fax (604) 822 - 6842
Porschedave@rennlist.net
1977 911S Carrera 3.0
rennlist member
http://www.pca-cwr.org
http://members.rennlist.org/porschedave

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