4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH5-speed transmission into S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Replace because of this as well
Performed · outcome unconfirmed
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 performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
i knew the speed sensors changed in 2002, but thought that it was due to the change in abs from 5.3 to 5.7 - didn't realise the axles changed because of this as well.
5-speed transmission into S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'Replace because of this as well' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'change in abs' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace because of this as well' (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 suspect 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.
Suspected cause · Original poster
i knew the speed sensors changed in 2002, but thought that it was due to the change in abs from 5.3 to 5.7 - didn't realise the axles changed because of this as well.
5-speed transmission into S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use 5-speed hubs
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 · Original poster
So, i might be able to keep wheel carriers, wheel bearings, etc., and just use the 5-speed hubs with the 5-speed axles.
5-speed transmission into S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use 8mm threaded bolt
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 2003 and up axles have 10.1 MM diameters holes in the CV bearing for both 5spd and 6spd, but the 5spd still uses an 8mm threaded bolt, which has a shoulder to make the through size 10mm.
5-speed transmission into S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (3)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Replace because of this as well
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
i knew the speed sensors changed in 2002, but thought that it was due to the change in abs from 5.3 to 5.7 - didn't realise the axles changed because of this as well.
5-speed transmission into S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use 8mm threaded bolt
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
The 2003 and up axles have 10.1 MM diameters holes in the CV bearing for both 5spd and 6spd, but the 5spd still uses an 8mm threaded bolt, which has a shoulder to make the through size 10mm.
5-speed transmission into S - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported and suspected causes (1)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
change in abs
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect 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.
Suspected cause · Original poster
i knew the speed sensors changed in 2002, but thought that it was due to the change in abs from 5.3 to 5.7 - didn't realise the axles changed because of this as well.
5-speed transmission into S - 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.
4 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: 20261026T203514Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
hi. looking into what's required to put a 5-speed transmission into an S car. the big question for me is axles:
- the orignal 6-speed axles are too long, correct?
- the 5-speed axles won't work with the S hubs without a bunch of work (non-S bearings and hubs, etc.) correct?
- 987 axles will work with the S hubs and are shorter, but would require S transmission flanges in the 5-speed. Anyone know the length of a 987 axle (5- or 6-speed) vs a 986 5-speed axle?
- any other suggestions?
Thanks for any help.
Some of this requires knowing which year(s) car and transmission.
1. You will need both transmission hangers (Mounts)
2. 987 axles take different speed sensors the sensor pre 987 picks up pulses from the outer surface. The 987 has the magnets on the face towards the bearing
3. 6spd axle splines are longer, so as you mentioned the bearing carrier will have to be changed.
4. 2002 and earlier transmission hubs on the 6spd take 10 mm bolts. The CV Bearing has a 10.1 MM through hole. The 5spd flange has an 8mm thread, and the CV bearing hole is 8.1 MM diameter through hole.
5. The 2003 and up axles have 10.1 MM diameters holes in the CV bearing for both 5spd and 6spd, but the 5spd still uses an 8mm threaded bolt, which has a shoulder to make the through size 10mm. You can get around this by drilling and tapping the axle flanges to 10mm (I have done this as a fix to stop breaking the bolts)
6. 5 speed axles are different lengths shorter than the 6Spd on the driver side and longer than the 6spd passenger side.
7. A 5spd clutch disc has a smaller pitch diameter spline, the same number splines, but a smaller pitch. so the disc's are not interchangeable.
I researched going the other way and it requires.
1. Both carriers, bearings, hubs, rotors and calipers. (same brake pads)
2. Both transmission mounts
3. Both axles and axle bolts
4. Clutch disc and pressure plate.
5. Shift cable set.
6. A transmission
If your going to use a 987.1 must be 987.1 axle, bearing carriers, hubs, rotors calipers and sensors. 987.2 add control arms and links
The overall cost was too much, so I stopped looking.
arrg. i knew the speed sensors changed in 2002, but thought that it was due to the change in abs from 5.3 to 5.7 - didn't realise the axles changed because of this as well.
so, that kills the 987 axle idea. i've been doing a bit of research (bearing cross-referencing) and the 986 5-speed axles might still work. the difference in 5- and 6-speed rear wheel bearings is in OD (+5mm for the S) and depth (+5mm for the S); the ID diameters are the same. So, i might be able to keep wheel carriers, wheel bearings, etc., and just use the 5-speed hubs with the 5-speed axles. from what i can see, only downfall is 5mm less thread for the axle nut.
possible?
This is a source reference. Confirm exact model applicability in the original material.
