911 (G/964/993) Convertible FIX

[SAM1]

Porsche 911 (G+964+993) Cabriolet Top FIX

I came along the following problem – the roof on my 91 964 C4 worked like a charm – then one day (last week) it stopped working – tried to twist my Bows and did that ratteling noise......

I tried to figure out what’s wrong but came to no conclusion.

So I disassembled the TwinMotor, the two Transmission cables and the two round shaped gears.

I tested the motor – fine, syncron Check
I checked the gears – drivers Side like new – passenger Side some resistance.
I checked the cables – spinning freely – no wear.....



Took me two minutes to figure out whats wrong:

The outer plastic cover of the Transmission cables did not shrink over the years – they extended.

By doing so the inner drive (cable) was almost covered all the way by the plastic tube.

So the square ends just were not able anymore to stay/ connect to either the motor or the gears anymore – thus no connection.

So I decided to cut he outer plastic tube (after pulling the drivewire out) to shorten it a bit.





I got some transparent plastic 3/8 Hose/ Tube at Lowes – and connected both outer Tubes back together by squeezing them into the clear Hose.

Guess what – perfect fix!



I then opened the gears and cleaned everything out – regreased the gears and put hem back together.....







Yesterday everything went back into the 964 and voila – the Power Top is back.

Hope that fix helps.

Keep the good things coming!

964 Convertible Top Gear/ Drive - YouTube

SAM

Disclaimer:
Please be aware, that this is a amateur fix - before you cut you transmissions make sure that this is the real cause of your problem!!!
No guarantee.

[fogcity]

Nice!

[jefrank95c4]

I had to replace the cable in my 1995 C4 Cabriolet one time when the roof was lowered with something on the back deck causing it to go down crooked and it broke the cable. I did it at the time without any assistance or posted tutorials. This makes things a lot easier.
Now I have to fix the roof again because it goes half way down and stops.
I have one question about the large partial gear inside the housing. Which way do you line it up when the roof is in the full upright position? I'm talking about the gear in the lower circle in the attached photo.

[fogcity]

Good info.
With my top, I've stripped the cables. Anyone know of a DIY replacement for these cables? The factory replacements are $$$$$