CSiJason

I gaurantee it isnt the 05's.

Jake99SS

I think the kit includes a new center section and halfshafts but I could be wrong. Not sure about axle stubs and what not.

rcsfastmonte

iTrader: (1)

hey great times there i plann on going with bigger motor what did you change in drive line? rear end and such? thnaks RC

CrabhartLS1

would someone please explain to me why 9" rear ends are never standard on modern V8 RWD vehicles?

Nightclaw

I'd heard somewhere it was a Dana M80. Is that just the name for an IRS D44, or was I misinformed?

And if it IS a D44 center, will R&P gears for D44 live axle applications (like a Jeep or K10 Blazer) work in our housings? If they will, there's a whole spectrum of ratios out there that could be really "interesting" (4.65's anyone...?).

Sorry to hijack the thread, but after all the axle nightmares I went through with my Z28, this is a topic of particular interest to me.

NYTIGER

The 05 rear is supposed to be stronger than the 04. Either way at 400RWHP you should be fine. If your were to Supercharge, Nitrous, or Turbo then I would take steps to strenghten the rear.

drivefastgto

9" rear ends are an old FORD design. Not only that, Ford hasn't used them in anything for over 20 years. They commonly get retrofitted into other cars because of their strength. Not commonly mentioned though is the fact that 9"s are normally heavier than most designs, and due to the pinion gear angle against the ring gear, they take a fair amount more power just to turn. BTW, someone correct me if the Aussie unit is not a Ford R&P. If someone only made a GM 12-bolt style setup...

groundradio

IF He can find an 05' Brand new for less than $24,000 he is A LIEING PIECE OF ****!

MyGoatBites

iTrader: (1)

I am right at the 400rwhp mark with about 385rwtq and I am holding together just fine. I have a DS safety loop and some slicks on 15 bmw wheels. I don't hook worth a **** and I spin through 1-2 and 2-3 pretty hard. I I hooked I would run high 11's and break **** all the time.

CrabhartLS1

I know they're a ford creation, i probably should have said "more robust rear end" instead of 9", like a moser 8.5" or so. The F-bodies always had a real problem with the M6 cars breaking their 10 bolts on stock power and DR's. Either someone was lazy and never upgraded the drivetrain, which it seems was the case, or they just wanted to cut costs.

Doesn't make much sense in the GTO though, if that's the only unit available period, that's one thing, but it would seem that laziness and cost cutting wouldn't be as big a deal on a $33k, much more modern car.

Do the Monaro's across the pond come with LS2's these days? or did GM just retrofit the LS2's in the cars without upgrading the rear end?

Cool_Hand_Luke

iTrader: (1)

There were quite a few GTOs running low-mid 11s this week.

http://www.ls1gto.com/forums/showthread.php?t=70280

Fat Nick

WOW?!? Tourettes syndrome anybody. One dealer here is selling a brand new 05 a4 18 for $26k, and they are letting 2-3k mile 05's go for $23k. I don't see where it's impossible to believe.

GoatChs

iTrader: (8)

I communicated with Ken at Harrop a very short time ago. He informed that their development of a "bolt-in" 12-bolt for the Commodore-Monaro/GTO (LINK) is only a couple months time from beinig completed, but they just don't have the couple of man-months to dedicate to the project! I believe that "cost" is the primary reason for not finishing the project...high cost creates low demand for the end product. If the finished product could be sold to the masses for $2000, I cannot imagine that they would be able to keep up with demand. But that is not realistic, and neither is anticipating high demand for a $6000 rearend...so the project holds its place it the priority list. If I could afford it, I would definitely have them fab up a single unit for me!

That said, Harrop also has a 9" setup too.

Redglow360

The irs will hold up alot better than you think, Im running 448/448 with a stall and the trany gave out first before anything else. Stub axles usually go first, then the dif, then the trans.

blewbyu

iTrader: (2)

If you have an A-4 , you will be fine . I made quite a few 11 , 10 , and 9 sec passes with no problems . It was when I got into the 9`s that I broke an axel stub .

TA455

Holy old thread, Batman. We know more about it now than we did when the thread was first started. Lot's of GTOs are running 12s and 11s on the stock rear. My times are in my signature. My car is an A4.

TUF383

The intenion is that the 12-bolt IRS will be available for ~US$4000.
It is being moved up the priority list ... we have already commenced the pattern tooling, so we need to complete it to get a return on the effort already made.

The 12-bolt will be completed as soon as we have finished the twin-screw supercharger, which is about to begin final durability testing.

KompreSSor

with stock tires and the full 455 bobcat package, do you think i'll have to worry about any of this?

Dbluegoat

stock driveshaft and everything on back here........automatic of course.....the manual guys are def. having problems

dan_e

iTrader: (1)

I did okay with my manual yesterday, good grip using Nittos and drag bags.

Here is on of my 12.1 passes at 117mph. Rear end held up pretty good. I saw plenty of other guys shaking the $hit out of their suspension like I did last year, tires and bags made all the difference for me.

http://media.putfile.com/Dan_Es-1213...R-on-31-Mar-06