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YOUR RESEARCHPorsche 996 3,6 transmission onto 3,4 engine G96.30 G96.31 Carrera 4
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Check though
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Suggestion · Original poster
I wanted to check though with the community on the differences in transmissions be between G96.30 and G96.31.
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Use 996 and even 997 - no modifications needed here
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Suggestion · Original poster
Slave cylinder - looks like same part was used for all 996 and even 997 - no modifications needed here?
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Hi folks! I'm undergoing a change of faulty transmission. The car is a 99' MY 911 C4. Since I came across a used transmission from 3.6 I'm doing such a swap. I have the engine out so did all the usual stuff (coils, water pump, RMS, IMS seal etc.)
I wanted to check though with the community on the differences in transmissions be between G96.30 and G96.31. I want to ask if someone already did it and to confirm if I figured out everything correctly in terms of components selection?
Gearbox - G96.31 has longer case, no other major external differences
I need to go with shorter front shaft - clear enough
distance between the input shaft and flange (facing the engine) differs slightly between 3.4 and 3.6 - has it any further implications?
Flywheel
seems both 3.4 and 3.6 use the same part so I bought a new LUK 415010210 - no brainer
Clutch - this was more tricky
Clutch - part numbers are of course different for 3,4 and 3,6, it also seems that 3,6 has a bit more torque capacity - ended up buying a 3.6
Comparing my used 3.4 with a new 3.6 kit from Sachs (3000 951 015) side by side
the disc looks and measure the same
pressure plate spring is 7mm more offset from the flywheel compared to 3.4
Clutch operations
I had the older type clutch lever 99611671203 and pivot ball (pictured)
I know there was a technical bulleting and a change in those parts
based on my research that at some point of time both 3.4 and 3.6 versions had the following combo fitted:
I went for: 1 x Clutch Relase Lever. Porsche 997 MKI / 997 MKII / 991 (99711671201), 1 x Clutch Relase Lever Sealing Ring. Porsche 997 MKI / 997 MKII / 991 (9P1141143), 1 x Clutch release lever ball pin. Porsche 986 Boxster / 996 (99611671604), 1 x Clutch Release Lever Clamp. Porsche 997 MKI / 997 MKII/991 (9P1141164)
Is all that correct? Will the updated lever from 3.6 fit?
Slave cylinder - looks like same part was used for all 996 and even 997 - no modifications needed here?
Would be happy to hear if anyone did that kind of swap and if I did miss something?
In particular I wanted to confirm if going clutch, clutch fork/pivot ball all from 3.6 will make it all work? Any other things to watch out for?
clutch pressure plate 996.1 is .200" shorter in length than the 996.2 , the 996.2 throw out bearing is .210" longer than the 996.1. This is important as they are interchangeable, but not correct to do so.
