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Discussion summary
YOUR RESEARCHMating trans and motor
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Check from now
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Read evidence and context
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Suggestion
I have a cheap tool to do the alignment so I'm sure to check from now on that it is perfectly centered while installing the pplate.
Leading evidence: 'Check from now' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check from now' (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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Suggestion
This can be tricky .Did you use a clutch alignment tool to center the clutch disc?The hard part is making sure that the bellhousing and the engine block are parallel in all directions .I am assuming that the engine is in the car and you are using a transmission jack .If you are trying to do freehand - good chance you will not suceed and bend something .There is no need for any force(hammers,bolts etc)if it is lined up right it will go together .If everything is lined up and still no go just rotate transmission shaft slightly.If it's a new clutch disc you might want to check that it's the right one and test fit on the transmission input shaft .
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.
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Suggestion · Original poster
Yup, clutch is centered and did test fit the clutch splines to the input shaft splines and it fit.
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.
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Suggestion
This can be tricky .Did you use a clutch alignment tool to center the clutch disc?The hard part is making sure that the bellhousing and the engine block are parallel in all directions .I am assuming that the engine is in the car and you are using a transmission jack .If you are trying to do freehand - good chance you will not suceed and bend something .There is no need for any force(hammers,bolts etc)if it is lined up right it will go together .If everything is lined up and still no go just rotate transmission shaft slightly.If it's a new clutch disc you might want to check that it's the right one and test fit on the transmission input shaft .
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
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Suggestion · Original poster
We're using a floor jack, not a trans jack, but did get things lined up and as parallel as can be.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Suggestion
This can be tricky .Did you use a clutch alignment tool to center the clutch disc?The hard part is making sure that the bellhousing and the engine block are parallel in all directions .I am assuming that the engine is in the car and you are using a transmission jack .If you are trying to do freehand - good chance you will not suceed and bend something .There is no need for any force(hammers,bolts etc)if it is lined up right it will go together .If everything is lined up and still no go just rotate transmission shaft slightly.If it's a new clutch disc you might want to check that it's the right one and test fit on the transmission input shaft .
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
This can be tricky .Did you use a clutch alignment tool to center the clutch disc?The hard part is making sure that the bellhousing and the engine block are parallel in all directions .I am assuming that the engine is in the car and you are using a transmission jack .If you are trying to do freehand - good chance you will not suceed and bend something .There is no need for any force(hammers,bolts etc)if it is lined up right it will go together .If everything is lined up and still no go just rotate transmission shaft slightly.If it's a new clutch disc you might want to check that it's the right one and test fit on the transmission input shaft .
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
This can be tricky .Did you use a clutch alignment tool to center the clutch disc?The hard part is making sure that the bellhousing and the engine block are parallel in all directions .I am assuming that the engine is in the car and you are using a transmission jack .If you are trying to do freehand - good chance you will not suceed and bend something .There is no need for any force(hammers,bolts etc)if it is lined up right it will go together .If everything is lined up and still no go just rotate transmission shaft slightly.If it's a new clutch disc you might want to check that it's the right one and test fit on the transmission input shaft .
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10 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261027T144324Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Have searched, read the workshop manuals, etc. Having difficulty mating up the motor and trans in his 99 986 (cross-posting here since I'd imagine the answer is the same or similar), specifically the splined shaft in the trans to the clutch. Any tips or tricks? Friend and I spent a lot of time and effort and couldn't make it happen. Should we use a hammer to nudge them together? How best to line up the splines?
Thank you.
Put it in gear and turn the flywheel with a long lever. If the gearbox isn't in gear the shaft and plate will turn together and never line up. It's been twenty five years since I've done this but it used to work!
Actually with gbox in gear you can just spin both of the drive shafts by hand in the same direction, it will move the splines to line up with the flywheel. Move it a little, try to push in, move it a little more, etc until they line up.
I find it's best to get the transmission shaft as level as possible with the engine, spend some time with a level and some measurements. If the shaft is pointing too far up or down it won't mate. You can try to push the back end of the trans up or down to work with the level of the shaft.
Also when you're looking at the trans from behind, you can sorta line up the bolt holes, that way you know when you're lined up right.
Don't use excessive force!
I've also been caught by not lining up the clutch correctly while installing the pplate, this makes it more difficult to mate, since the clutch disc splines will be off center. I have a cheap tool to do the alignment so I'm sure to check from now on that it is perfectly centered while installing the pplate.
We'll try the level thing today. Bolt holes are lined up with some guide rods in a couple of the holes. Clutch is centered w/ the tool too.
Thank you for the response!
This can be tricky .Did you use a clutch alignment tool to center the clutch disc?The hard part is making sure that the bellhousing and the engine block are parallel in all directions .I am assuming that the engine is in the car and you are using a transmission jack .If you are trying to do freehand - good chance you will not suceed and bend something .There is no need for any force(hammers,bolts etc)if it is lined up right it will go together .If everything is lined up and still no go just rotate transmission shaft slightly.If it's a new clutch disc you might want to check that it's the right one and test fit on the transmission input shaft .
you should be able to turn a rear wheel. You may have to put the car in gear and hold one wheel, turn the other and the trans mainshaft will turn. Height is critical and is that both be on the same plane center line wise. I'm sure you know this. Are you installing the motor or trans? If the trans, turn a stub axle.
Yup, clutch is centered and did test fit the clutch splines to the input shaft splines and it fit. We're using a floor jack, not a trans jack, but did get things lined up and as parallel as can be. We'll just keep at it today. As I mentioned, we didn't expect to run into any difficulties, as ALL of the instructions online cover disassembly. Even the shop manuals just say assembly is the reverse of disassembly!
Installing the trans. We were turning the stub axles but noticed you barely turn the axle to turn the input shaft, so maybe it's just a matter of more persistence.
