13 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 Cab top operating slow - fluid is full
Leading reported evidence
Fill reservoir
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Performed · outcome unconfirmed · Original poster
A couple of months ago I filled the reservoir which was a bit low and the top worked great but recently it started to act up as above and opening/closing slow.
Leading evidence: 'Fill reservoir' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'battery or not)' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check battery free' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Discussions that suspect a cause
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Suspected cause
not running (this would help you determine if it was the battery or not).
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Suggestion
If all is normal then get pep boys to check the battery free for you.
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Performed · outcome unconfirmed · Original poster
A couple of months ago I filled the reservoir which was a bit low and the top worked great but recently it started to act up as above and opening/closing slow.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
13 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261027T005001Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
All,
my 1999 996 cab top is working but it raises and lowers extremely slow, sometimes stopping and requiring me to release and again press the button to open/close the top.
A couple of months ago I filled the reservoir which was a bit low and the top worked great but recently it started to act up as above and opening/closing slow. I checked the fluid and it is still full above the + marker. I have not found any leaks. Any ideas on what to check next?
Thanks!
George
Low battery would seem like the obvious culprit. Put it on charge overnight and try again. If all is normal then get pep boys to check the battery free for you. It may be loosing it's charge over time. They last 3 to 5 years tops.
Does it change when the car is running vs. not running (this would help you determine if it was the battery or not). Also, does your car have an aftermarket auto-top add-on? I had one, not the smarttop, but a different one that goes in the dash behind the open/close button. This was nothing more than a timer and never seemed to work right for me... worked better once removed and I never had to guess if it was going to finish closing or not!
Other option. Get it into service position. (and here is where I will get some ribbing from some posters) spray a little WD40 on all moving parts of the top.
Same when running or not. I do have the Smarttop module. Think I will pull it to see if anything changes. next step after that might be to lube the hinges.
thanks for the replies.
Good advice so far. I would follow up on the above items first.
The next thing I would consider is a bad hydraulic pump or pump motor. Has the sound of it changed significantly since this issue has started to occur?
turns out it needed some more fluid. i was looking at it with the top up instead of in the service position. Which is different. I guess this means I have a small leak somewhere since I filled it a few months ago as well...
Possible leak on both or one of the pistons which raise and lowers the roof. You can have yours refurbished. Easy to check when in service position. The lower end should be wiped around with tissue for the leak.
