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Old 05-19-2008, 02:50 AM   #1
MikeHall
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Default WRX transmission (reverse rotation)?

Could you install the differential with the ring gear on the other side of the pinion to make the transmission run in reverse rotation? I bought a WRX transmission and a EG33 for a 914 project but I think im going to get a 911 now. This might not work due to the way the gears are cut in the transmission but then again I dont know and thats why im asking. LOL

Mike
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Old 05-19-2008, 04:01 AM   #2
ciper
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The Vanagon guys bolt Subaru engines to Volkswagen transmissions all the time...
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Old 05-19-2008, 11:21 AM   #3
Einimas
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If you'd flip the diff gears would go in correct way.
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Old 05-19-2008, 11:59 AM   #4
MikeHall
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It would go the correct way for a rear mounted engine right? Putting the Ring gear on the other side of the pinion would cause it to rotate in reverse but can this be done?

Mike
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Old 05-19-2008, 01:43 PM   #5
Matt Monson
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Mike,
What you want to do if you try that is to run the transmission upside down. It requires adding a new hole in the top for a vent. Then you plug the old vent and it turns into your drain going forward. You would also need to do something about the dipstick. I don't honestly know of anyone doing this, but I think it could be done. We do it all the time with Porsche transmissions in my shop.

But I would ask you why you want to use the Subaru transmission at all? Just use the Porsche one. For all the extra brain damage to run the Subaru tranny, I don't feel that it's substantially stronger than the Porsche tranny. Porsche and Subaru trannies are my business. Feel free to drop me a line and pick my brain as this moves forward.

Also go search on Pelican. There's a guy who put an SVX engine into a 911 earlier this year. It's a great thread with lots of good pictures and ideas. He even indicated that he might consider making some "kits" to ease the install.
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Old 05-19-2008, 03:11 PM   #6
Numbchux
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no. the pinion shaft isn't exactly centered, so if you flip the front diff, the gear mesh will get substantially screwed up.

also, IIRC there's an issue with clearance for the ring gear on the other side.




but, as mentioned, the best solution is to just use the porsche trans.
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Old 05-20-2008, 09:19 PM   #7
MikeHall
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yeah I think that would be best. Good news is I came out of my temporary insanity and just going to finish my 914 as planned. This thing should be a rocket with stripped down EG33 with WRX transmission.

On a different note, I did not check but does the WRX transmission come with a LSD? If not what all is involved in installing one?

Mike
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