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Join Date: Oct 2004
Location: CA
Posts: 5,837
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83 SC with aftermarket Hill-assist feature (broken E-brake)
I'm trying to pick your brains again on this... My 83SC has developed a strange "feature", I call it hill-assist. If I set the E-brake, and undo it, the car will not go backwards. At all... I *can* overpower it with reverse, but it feels wrong in 10 kind of ways... (you can heard stuff go "clonk")
If on the other hand I move forward even 1 inch, it releases perfectly... Great for San Francisco Hills but I live in Tampa now, and it bothers me...(If I could figure it out I could patent it for hilly regions ;-) I looked at the thing last time I asked on the board, saw nothing funny... But I'm not an Ebrake guru.., if you have photos of how it could look wrong (or right), please post them so I can compare ! The odd thing is, if I put the car on the lift (free hanging wheel), and set/undo the E-brake, it does not "do" this, it spins OK in both directions. The car has to be on the ground, under load, the the Ebrake locks it solid in reverse... ??? |
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02-07-2010, 12:31 PM
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Bump-bump-bump... I'm gonna take it all apart again, but since it does not do it when on the lift, I'm probably wasting my time !
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02-10-2010, 05:44 AM
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With the car jacked up apply then release the E brake.
Now slide under and grab the cables they should both be a little loose (push in and pull out) If only one side is loose take apart the other one.
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Pete 79 911SC RoW "Tornadoes come out of frikkin nowhere. One minute everything is all sunshine and puppies the next thing you know you've got flying cows".- Stomachmonkey |
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02-10-2010, 05:56 AM
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Greg I would think it must be a ebrake shoe hanging or a cable sticking on one side. I think if you pulled of the rotor you would find the problem.
 
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1974 sahara beige 911 targa 1982 chiffon 911sc 1985 prussian blue metallic carrera |
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02-10-2010, 06:05 AM
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Join Date: Feb 2008
Location: Altamonte Springs, Florida
Posts: 342
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The e-brake is a pretty simple system so the cause for this "hill assist" feature can only be limited to a few parts. My thoughts on this are that the e-brake shoes are not dis-engaging when loaded in the backwards direction. This would seem to indicate that the shoes are not set correctly, or the expansion spring gets jamed or something similar. My suggestion would be to remove both of the rear disc/drums and watch the operation of the e-brake components when someone else is cycling the e-brake for you.
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FC '73 911 Track Car '99 996 Daily Driver '93 968 Wife's Car '05 Cayanne S Family Car |
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02-10-2010, 06:17 AM
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1979 Porsche 911SC
1974 Porsche 911 targa 2.7
