Also, you will need to adequately modify the front suspension and add negative camber. Ripping the AWD alone makes the car severally understeer.

^^SteveK: Sport Mode as in NO OVER BOOST....OR...The ability to stiffen the suspension? Sport suspension mode has already been eliminated when the Ohlins TTX's were installed.

^Prodigymb: RE: "code out AWD" Thanks! I'll pass the info along. The car is getting dropped off tomorrow night so they can begin working on it first thing Monday morning.

If you can believe it, when the first CV exploded it rubbed through the fuel tank shield and burned through part of the gas tank...not all the way....but dangerously close. Thus, a new tank is getting installed.

When you take into consideration the price of the conversation + the depreciation on the car, it wouldn't cost that much more to sale the turbo and buy a GT2? Especially since the GT2 will end up appreciating whereas a modified turbo will depreciate.

I Think the part that replaced the diff, is about 1200$. Its not expensive and you really ripping things apart. Call Todd and trophy performance in Las vegas. He can give you the run down.

^Squat: New OEM front Diff, $1,200??? Dealer quoted me $6500....

^^997.2TTS: The vehicle already has everything done, installed and proven....the issue is that the front diff has failed and a new one is $6500 plus labor to install....verses two hours to just remove it altogether. Removing it opens up a new set of tire and wheel options for me....9.5" x 18's with Michelin Slicks up front... 12.0 X 18 rears. The car spends the majority of its time on track...not the street.

VID, sport mode as in overboost.
rwd is easy for the 997. u already have an LSD, all you need is upper mounts in the front to get that "on rails" feeling that a gt3 gives ya.


btw, Squat is right. ive seen 997 front diffs (taken off a totaled car i assume) for $1200 (exactly) on ebay.

Vid, one more thing. as far as tire sizes... remember, gt2s and gt3s have a similar tire set up (taller rear than front). rear always need to be taller than the front.
with that being said, i can only imagine your car on a 265/345 set up !!! :)


one last thing, if the tank is getting replaced, you can put a 25 gallon gt2 tank !! it will fit once your front diff is removed.

I am not sure if the software checks for a front diff before going into overboost. I had mine out and never lost the overboost.

Squat: So you have had your 997.1 TT (Model Year 07-09) converted to RWD?

Steve K: 25 gallon tank would be nice. Unfortunately the tank was ordered two weeks ago. I just found out earlier today it would not make it state side for another three weeks. Therefore, the car did not get dropped off this evening. I found a place in SoCal that might be able to re-build/service the diff. Bill Rader recently serviced my rear tranny....I will check with him regarding a re-build/service of the front diff if it is even possible. I also was able to locate three used units today for $2500 with a 90 day guarantee. The units between $700-$1200 were for 996TT's...completely different unit than the 997.1.

UPDATE:

Well, the new fuel cell arrived earlier today as did the GT2RS Axle Stubs!

Out with the driveshaft, left & right front axles, and then the differential!

Hopefully all will go smoothly. The vehicle should be ready for pickup Monday evening!

Cheers,
VID

https://cimg6.ibsrv.net/gimg/www.6sp...f47ebabfbc.jpg

https://cimg9.ibsrv.net/gimg/www.6sp...b8a770b74a.jpg

https://cimg0.ibsrv.net/gimg/www.6sp...bffb7a162f.jpg

Nice! Look forward to hearing your outcome.

Had this bad boy installed back in October while we were trying to trouble shoot diff issues.

Champion GT2 Pro 40/60 Spec Guards Rear LSD.

https://cimg6.ibsrv.net/gimg/www.6sp...33ba96e288.jpg

subscribed......good luck!

Are you changing out your front uprights also to the proper GT2/3 units? The reason I ask is that the GT2/3 tension bolts (aka axle stubs) are NOT compatible with the AWD front uprights. At least on a 996 they are not but I don't know about the 997. It's a bit of a moot point as you really wanna change the uprights to correct the front geometry and you're probably doing that anyway. Just curious.

This is a great thread. Subscribed and good luck.