11-08-2009, 03:47 PM
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#1
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Registered User
Join Date: Nov 2009
Location: mass
Posts: 731
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How tough is a Boxster S gearbox
I was looking over the specs. on my newly purchased 02 Roock 340. They beefed up all the important stuff except the gearbox . can the boxster gearbox handle the added torque of the 3.6 engine long term.
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11-08-2009, 08:03 PM
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#2
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Registered User
Join Date: Dec 2008
Location: Queensland, Australia
Posts: 1,522
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Give Jake Raby a call at Flat6innovations (see above sponsor).
If he doesn't know, no one will.
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11-08-2009, 08:09 PM
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#3
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Registered User
Join Date: Sep 2006
Location: AZ
Posts: 105
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Also, there is a You tube video floating around that shows how to check for trans bearing wear -- basically you drain the trans fluid and stick a little finger inside the hole and feel for grease and shavings on the magnet near the drain hole. I'm just passing on second hand info -- but you might also want to check with "Tholyoak" in Kansas who has put several of these motor swaps in older Boxsters.
FWIW, etc... 
Take care,
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11-09-2009, 08:45 AM
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#4
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Registered User
Join Date: Nov 2003
Location: Illinois
Posts: 3,033
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It should be up to the task no problem. The S trans is a carry over item from the 996.
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11-11-2009, 05:24 PM
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#5
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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My 3.6 is using the original stock 1998 2.5 5 speed. Between Tholyoak and I it has over 30K since the conversion, no issues so far.
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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11-11-2009, 09:22 PM
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#6
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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The Boxster S 6 speed is the same base tranny thats used in the 911. The internals of these units are robust, only having pinion bearing failures due to the bearing design.
I have yet to see one break from power additions..
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11-12-2009, 06:16 AM
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#7
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Registered User
Join Date: Nov 2009
Location: mass
Posts: 731
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that is really good news. even with the sloppy 5 speed
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11-12-2009, 06:18 AM
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#8
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Registered User
Join Date: Nov 2009
Location: mass
Posts: 731
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3.6 conversion
Quote:
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Originally Posted by Paul
My 3.6 is using the original stock 1998 2.5 5 speed. Between Tholyoak and I it has over 30K since the conversion, no issues so far.
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any issues or quirks with the 3.6 conversion
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11-12-2009, 09:02 AM
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#9
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Registered User
Join Date: Mar 2008
Location: Charleston, SC
Posts: 230
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With my 3.6L the only thing that changed is i cant downshift into 2nd now. I dont think its motor mounts or shift cables bc my shop checked those. I have solid motor mounts not oil based. Any ideas Jake, anyone?
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11-12-2009, 06:33 PM
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#10
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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Quote:
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Originally Posted by jacabean
any issues or quirks with the 3.6 conversion
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I've had an off and on issue with the eGas other than that, it's been great.
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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