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Old 06-25-2015, 08:16 AM   #1
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Convertible top issue - jerking during operation

Hi All,

I'm about 2/3 of the way through a road trip from Texas to maine, so please excuse the brevity and typos (on my phone).

My 2002 boxster s seems to have started exhibiting issues with the passenger side actuator for the convertible top. When I lower it, it seems to stutter/jerk about halfway down the travel. No issue when closing it.

I'm thinking that it may be coming off of alignment, leading to scraping, but haven't been able to fully diagnose yet. Has anyone had this issue? Can anyone recommend a lubricant to use to treat the actuator? Thanks for your help!
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Old 06-25-2015, 10:01 AM   #2
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The plastic gear inside the transmission might be broken.
I had the same problem, first tried to change the motor, didn't help. Then I found out about the plastic gear issue, swapped it with a metallic one and now everything is fine.
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Old 06-25-2015, 10:22 AM   #3
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Try lubricant in the tracks first it maybe just dry. Note however if it jerks enough the gear can break

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Old 06-25-2015, 03:46 PM   #4
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Originally Posted by healthservices View Post
Try lubricant in the tracks first, it may be just dry.
What he said. I've heard of it getting so bad that there is jamming and the fender wall is deformed.

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Old 06-25-2015, 08:52 PM   #5
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What is the best lubricant to use for the tracks? Something like WD-40 or a thick grease?
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Old 06-25-2015, 09:14 PM   #6
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Marine water-repellant grease
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Old 06-25-2015, 09:29 PM   #7
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Isn't all grease water repellant?
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Old 06-26-2015, 12:48 AM   #8
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I have used lithium grease in a high pressure rattle can and a long straw wand.

Fresno is talking about marine grade grease which repels being washed off by submersion or water movement - used in marine prop shafts / boat trailer wheel bearings immersed in/out of water. It maybe a little heavy and sticky for the sliding roof rails though....
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Old 06-26-2015, 08:32 AM   #9
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I just used regular white lithium grease, on an old toothbrush IIRC.
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Old 06-27-2015, 07:11 PM   #10
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Thanks everyone. I'll grease it with lithium grease, and if that doesn't work, will check on the gear.

EJ-Fresno, where can I get the replacement metal gear?
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Old 06-28-2015, 08:41 AM   #11
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2 New Porsche Boxster Convertible Top Transmission Gear Gears L and R Side | eBay

There you go
They sell them by the unit as well.
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