Porsche Sportomatic available for the 911 and “pre-1972” 914/6

Using a vacuüm operated diaphragm clutch and a 4 speed trans-axle the Sportomatic was a Porsche rave in 1976.   As the driver, you would get to run your 911 without ever having to shift.   Still, if you looked inside, you would clearly see that there a stick shift between a driver and passenger. 

The Porsche Sportomatic is surprisingly similar to the early 4 speed manual transmission, with also having on the reverse a sliding gear to make a parking lock arrangement.

Using the vacuum servo arrangement, gear changing occurs automatically by having the clutch move in an opposite direction than your traditional manual clutch shifting.  To drive using the Sportomatic is actually very nice, and very easy.  All you is jump in, then stick in the key.  Upon starting, the familiar Porsche engine sounds completely 911.  The stick shift is completely 911 as well, in which all you do is shift into gear, and off you go. 

There is ‘P’ Park, ‘R’ Reverse, and then ‘L’ Low and four (4) ‘D’ Drives.  There is no clutch pedal to press.

Porsche’s biggest reason for even providing this option was for a growing youth of US drivers that just did not know or want to fool with a clutch.  Even now, less and less car manufacturers are providing clutches and the problem will become an issue as manual transmission sales continue to dwindle to the hardest core shifter only car drivers, like myself.     What was more remarkable was Porsche designers were completely was aware exactly how none sportsmanlike having a traditional automatic transmission was in the sports car world.    Reinventing a special breed of sports cars, what Porsche did was then to make a “Sportomatic transmission”, a kind of semi automatic shifter that the Porsche driver would need to control.   This kind of transmission wasn’t causing the driver to need to manipulate foot to clutch to shifting timing.   This also got rid of some very notorious bad habits, like the infamous over-rev.  You bet.  Since this kind of transmission is not full automatic, it requires the driver to think of shifting gears like in a regular 4 speed.  Start rolling in first gear… maybe get up to rolling speed in second and then third and fourth but the sound of the engine.  There was never a fifth gear in those days.

In this sense, the driver would then place all their attention driving a 4 speed without the foot clutch.  

Here at A. Bauer Porsche, we see them occasionally.   Most of them had ended up getting damaged, and then it turns out they changed out to the five speed manual transmission.  To change them out you will have to do some modifications to get them installed.   Others, should one be lucky to get parts, can get them repaired with factory specifications.

The Sportomatic transmission option, (cost adding almost was not factory isolated option for the 911, but was also provided on five experimental pre 1972 914/6 as well.    Amazing!!!

If you happen to have a Sportomatic Porsche, make sure to keep it because its rare, and more importantly don’t convert it to manual transmission.

Advertisements

12 responses to “Porsche Sportomatic available for the 911 and “pre-1972” 914/6

  1. I own a 72 sporto that i still drive weekly.

    It hasnt had tranny servicing in 20 years because they dont do it where i live…but it still gets around no problem, albeit with a the odd buzz going into 2nd 8).

    I am hoping one day to have it tuned up and continue to keep it operating .

  2. I have a 1970 sporto and it is so cool to drive and runs great. Parts are hard to find, but I have managed to get a good supply of parts. Great article! Jerry Woods

    • Hi Jerry Woods

      I am glad you like my article. Its interesting to see just how people might have been thinking back then that even had Porsche to consider making such a thing. I am curious however how any of the sportomatic affected any of the decisions on the current Panamera or the 991.

      .t.

  3. Let’s make it three in a row. I have a 1971
    Sportomatic and love how it drives. The four
    gears are all you need and once you get use
    to the right downshift points it is a joy indeed.
    A very fun car to own!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s