DIY fix your own 996tt front differential
Everything is put together with the dif, but I still want to change front control arms and spark plugs while it's in the air and do a pressure test to track down any leaks. So the test drive might be tommorow evening
Nope I'm stock for now so no point. Also as I stated, I don't think the front differential is made to handle much more power than it already does.
However since I'm changing spark plugs and the rear bumper is off I'm tempted to take off the stock muffler, whip out the cutoff wheel, and test my new MIG/argon setup by gutting it
I'll post pics if I do.
I'm stock for now so no point. Also as I stated, I don't think the front differential is made to handle much more power than it already does. However since I'm changing spark plugs and the rear bumper is off I'm tempted to take off the stock muffler, whip out the cutoff wheel, and test my new MIG/argon setup by gutting it I'll post pics if I do.
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tial has flanges burns has mufflers many places have mandrel bent ppipes and you got a mig welder go for it.
hell you could just tack it together and take it to someone else if you wanted it to look good...
hell you could just tack it together and take it to someone else if you wanted it to look good...
Excellent write up Adam (+1 to you) and good question Dennis...Ill be interested in this as well.
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Is there any mod to make center vicous to transfer more hp to front wheel? Or any aftermarket part?
(I used to have Subaru STI, there are some upgrade center diff to tune for more hp to the front.)
(I used to have Subaru STI, there are some upgrade center diff to tune for more hp to the front.)
The part number of off the ring carrier is 964.332.212.2R.
Honestly, an LSD in the front of a 996tt would be useless as it's not like either wheel will ever break traction. I think it might be a better idea to hybrid a 996tt front diff and a 997tt diff as they seem to be closely related.
Honestly, an LSD in the front of a 996tt would be useless as it's not like either wheel will ever break traction. I think it might be a better idea to hybrid a 996tt front diff and a 997tt diff as they seem to be closely related.
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yes, it is the same type of center diff as the sti. But porsche chose not to go any further with it than to provide minimal power to the front. this is what happened to a diff on a 2wd dyno with no front roller
We'll to be exact this is not that there was no front roller, it's just that the front wasn't linked to the rear, which actually added resistance to the diff. So again the front diff is not there to "drive the wheels" but reather to unload the rear wheels partially.
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I was sort of going to test my Dif this way here soon. I was going to drive it on a Mustang dyno, with the front and rear rollers disconnected. I was just going to let it sort of roll itself in first gear under the lightest (if any) acceleration, just to see if the front tires rolled the front rollers, then stop, like a 10 second test. Do you guys think this will work or is it a bad idea?
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yes it does. I can slide the rear out anytime I want and spin the rear tires, and there is minimal power going forward. However, it would be nice to have an Sti like setup that you can choose how much goes to the front from 0 to 40% manually and have a diff that can actually take that power.
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How many % does the front do in our tt?
yes it does. I can slide the rear out anytime I want and spin the rear tires, and there is minimal power going forward. However, it would be nice to have an Sti like setup that you can choose how much goes to the front from 0 to 40% manually and have a diff that can actually take that power.
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I have heard from 5% to 40%, but I don't believe it. I'd say no more than 30% at best. Last year getting on an onramp on a cool crisp night in 2nd gear I spun all 4 tires like I was on ice. So I know they do spin.
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Adam,
This is a fantastic writeup. I have a question about the noise though - were you just hearing constant noise, or something more abrupt?
I've noticed a couple of times in the last week a crunchy noise if I'm only lightly on the throttle around a turn, in the vicinity of the rear seats. My old STI made all sorts of noises at low speeds ... but I'm not sure this is normal on the 996.
This is a fantastic writeup. I have a question about the noise though - were you just hearing constant noise, or something more abrupt?
I've noticed a couple of times in the last week a crunchy noise if I'm only lightly on the throttle around a turn, in the vicinity of the rear seats. My old STI made all sorts of noises at low speeds ... but I'm not sure this is normal on the 996.