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Shortened G50 clearance issues

Hi all I have a shortened G50 trans that will not mate up with engine case it is 100mm from done but just wont go all the way in.. the flywheel and ring gear are very close to the trans case but it is not touching once I remove the gearbox there are no scrub marks on the cases I would say maybe 1-2 mm clearance has anyone else had this issue the clutch kit is a Patrick motorsport
Old 11-08-2017, 01:47 AM
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Shortened G50 clearance issues

Hi all does anyone have the measurement from start of clutch plate spline to end of shaft .. I have 42.98mm I am thinking the end where it locates in the spigot bearing is to long and wont let the gearbox close all the way..
Old 11-08-2017, 01:21 PM
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Remove the clutch and try installing the trans onto the engine again. You'll be able to look through the cutouts in the bell housing to see if the input shaft is bottoming out on anything, i.e. machined incorrectly or wrong pilot bearing.
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Old 11-08-2017, 01:37 PM
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Thanks Chris will do
Old 11-08-2017, 01:46 PM
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Check the OD of the bearing guide tube vs the ID of the TOB. From the pic it looks to have left some galling ? Just to be safe?
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Old 11-08-2017, 03:00 PM
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Also check that the clutch plate matches up with the input shaft. It is possible the splines are different and preventing proper mate.

Do you have clutch plate properly centered?
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Old 11-08-2017, 04:37 PM
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Which clutch and pressure plate are you using?
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Old 11-09-2017, 07:43 AM
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Do you have a early 930 pressureplate with the G50 diaphragm?
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Old 11-09-2017, 03:06 PM
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You require a shortend guide tube. Remove the guide tube and turn off a few mm from the end. Sorry but forgot how much is shorter is needed. Email daryl@patrickmotorsports.com and he will tell you.

Way to go, congrats on the G50 plunge. You won't be sorry.
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Old 11-10-2017, 12:20 AM
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5mm off the engine side fairly sure..but don't quote me!
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Old 11-10-2017, 12:29 AM
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Old 11-11-2017, 01:22 AM
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There was a change in the guide tube on the Carrera as I had to change the guide tube to get it to button up.
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Old 11-11-2017, 05:27 AM
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The change to the release bearing and guide tube was the diameter, not the length.

Paul -- if you bolt the two together without the clutch in place, you'll be able to see any interference that may be stopping this from going together, ex:
* the guide tube striking the flywheel or pilot bearing
* the input shaft not fitting within the pilot bearing, either by diameter or depth
* the bell housing machining (counterbore) doesn't match the engine case
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Old 11-11-2017, 12:00 PM
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Hi All thanks for the replies... the ring gear was just touching where the starter cut out is so I carefully machined it.. reassembled rotated the engine several times with plugs out and no binding
the clutch kit I have is a Patrick flywheel 60-2 , Sachs alloy p/plate 930 ..Sachs rally organic c/plate 930 G50.. I did try to fit starter last night but it would not engage ... is the small lightweight type starter ok to use with this combo... must admit jump pack was going flat so will try again later.. one more thing my G50 does not have the large cutout on the RHS.. is this for the timing sensor to locate.. cheers Paul
Old 11-13-2017, 01:48 PM
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