12 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH1999 Boxster slips going into 5th tiptronic - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported or suspected cause
previous owner had the work done
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported cause · Original poster
The problem is the previous owner had the work done and that was 13 months ago according to the paperwork.It's my deal now..
1999 Boxster slips going into 5th tiptronic - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed work
Check fluid.should it be
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
Thanks for all the help guy's it has only happened once.It just had me a little concerned.Looking at the paperwork the trans fluid and rebuild was performed 14 grand ago.This weekend i will check the fluid.Should it be changed?Can the fluid be bought locally and what type?Im waiting on my manuals..I will also check that vacum valve.
1999 Boxster slips going into 5th tiptronic - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'previous owner had the work done' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'previous owner had the work done' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check fluid.should it be' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
Thanks for all the help guy's it has only happened once.It just had me a little concerned.Looking at the paperwork the trans fluid and rebuild was performed 14 grand ago.This weekend i will check the fluid.Should it be changed?Can the fluid be bought locally and what type?Im waiting on my manuals..I will also check that vacum valve.
1999 Boxster slips going into 5th tiptronic - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check tip fluid level is a relatively complicated procedure, done
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The reason it's not in the owner's manual is that checking Tip fluid level is a relatively complicated procedure, done from under the car.
1999 Boxster slips going into 5th tiptronic - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check trans fluid
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
1999 Boxster slips going into 5th tiptronic - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace now
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I had it serviced, fluids and a filter and its much faster changing now.
1999 Boxster slips going into 5th tiptronic - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (6)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check fluid.should it be
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
Thanks for all the help guy's it has only happened once.It just had me a little concerned.Looking at the paperwork the trans fluid and rebuild was performed 14 grand ago.This weekend i will check the fluid.Should it be changed?Can the fluid be bought locally and what type?Im waiting on my manuals..I will also check that vacum valve.
1999 Boxster slips going into 5th tiptronic - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Coverage and how to read this overview
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.
12 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T112012Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi i just bought a 99 Boxster and was getting on the interstate and i had it in Drive.I was in forth as it shifted to 5th it reved up about another grand before it grabed.It has just had the trans rebuilt with a new torque converter.Any thoughts would be great thanks.
The reason it's not in the owner's manual is that checking Tip fluid level is a relatively complicated procedure, done from under the car. If you're keen on doing this sort of thing yourself, I recommend you buy the Bentley manual.
1. Car on jackstands
2. Run car until trans temp reaches 100 degrees F. using infra red temp tool
3. Remove filler plug with car running
4. Pump in ATF 1 with hooked filler tube until fluid overflows out the hole
5. Close plug and turn off car
6. Road test
7. Repeat if necessary after ATF has cooled down to 100 F.
It's a messy job. Temperature is important. You can make the filler out of a modified garden sprayer.
Todd
Also had this slipping 5th thing a while ago. There is a vacuum valve that triggers open/close for the cooling of the tip. Located on the driver side right next to the tip/shift rod. This valve was shot (seized) on my car and after my indy here replaced it for a new one ($125) the slipping 5th instantly stopped.
Yours might also be overheating like mine was but as the other fellas here recommended, it's worth ruling out low ATF also
luck mate
Are you lifting off of the throttle when you change then picking it up hard as soon as you hit the switch ? Does it do it in other gear changes ? Mine was a bit slow but it didn`t jump a grand though. I had it serviced, fluids and a filter and its much faster changing now. Can you smell burnt trans fluid ?
Thanks for all the help guy's it has only happened once.It just had me a little concerned.Looking at the paperwork the trans fluid and rebuild was performed 14 grand ago.This weekend i will check the fluid.Should it be changed?Can the fluid be bought locally and what type?Im waiting on my manuals..I will also check that vacum valve.
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