8.8 or 9" rear?

[Scorpion1]

Im lookin to get three things done by the end of this summer.
I want a "posi" or LS rear end. Ive seen alot of talk about the 8.8 in the V6 Mustangs but what about the 9"? Also which ones came with the Tlock or are they all this way? Details of what all goes into the rear swap would also be greatly appreciated.

Secondly, do they make long tube headers for the V6? Ive seen the BBK shorties but Id like to go with long tubes to keep my low end torque at its best along with a 2.5" w/ high flow cats and cherry bomb extreme mufflers.

Third. The transmission in this car seems a little shady at times (sounds like a very quiet/mild grind right after clutch engagement in second, I think its gonna go sometime in the next year) so Id like to install a better, stronger transmission. Ive seen built ones that are supposed to handle like 500hp. So whats a good transmission to go with, along with clutch kit and flywheel(since I might as well do it all at once) 5Spd

[SimplyOrange]

depending on your mods if you even need a 8.8,a 7" may be fine depending on what power you plan to make, a 9" would be extreme overkill for your car. a stock 8.8 would probably be sufficient no matter what your plans are,our terminator 96 cobra has a stock 8.8sra and makes 449 rwhp. and it is still fine.if you do break a stock 8.8, then just upgrade it to 31 spline and you will not break that.all of the 8.8s are trac lock.the swap is pretty much a bolt in deal, you kust have to run gt rear brakes or do a bracket change on the rearend.

i think kyle has longtubes on his, i know they make them though.

i havent done many v6 transmissions but i would have yours upgraded if they can handle 500 hp. what are your plans for the car?

[bbunt302]

The 8.8 will be more than enough. For the transmission, I'd recommend a G-Force T5 if you really plan on making that much power.

[Herbstang]

Mac makes long tubes for the V6 also kooks custom headers

[PureVenom]

Quote: Originally Posted by SimplyOrangeTPS i think kyle has longtubes on his, i know they make them though.

Kyle has stock manifolds.

[SimplyOrange]

damn, i saw longtubes on somebodys v6

[Scorpion1]

Well right now I have two options. I can get a 4.6 with 30k and build IT(buddy would give it to me for $1500) but Im not sure Id have the money in time so chances are Ill just build a 3.8 to replace my high mileage one. Id be looking at the following mods (generalized)

.20 over low compression forged internals
high volume oiling system
upgrade cooling system
more fuel/spark
turbo/supercharged (still debating, most likely supercharged if I can find a centrifugal type for the 3.8)
ported intake/exhaust with built heads and mild cams
large bore TB ect ect.

[SimplyOrange]

procharger makes a nice centrifugal but 4.6 has more potential, either way a stock 8.8 will be plenty.

[Scorpion1]

alright so what gear comes with the 8.8, and should I conisder upgrading?

[SimplyOrange]

either 3.27 or 3.55 will come with the rearend depending on the year, but in my personal opinion id run 4.10s, 3.73 at least.

[Scorpion1]

4.10's it is. Whats the benifit of putting in higher rear gears? (its been a while since Ive delt with gears and what not haha). Also, I just thought about it, would a 6spd trans bolt up to the 3.8? Or am I stuck with T5/T45 transmissions?

[SimplyOrange]

the bigger gears will make you accelerate faster...to be honest with you, i havent paid attention to the bellhousings. somebody may make a conversion..if you are interested in a t56, let me know i may sell mine.

[Horse]

So you know, you'll need a lot more than just the motor to swap a 4.6 into a v6 body. You need all the wiring harnesses, a GT computer, the fuel system may be different too, I'm not sure if the GT is returnless fuel rail or not. Usually the only way you'll be able to do the swap cheaper than just buying a GT, is to have a donor car (a wrecked one that the motor is good in) and start swapping parts.
Oh, the GT motor is heavier too, I believe, so stiffer suspension in front would be needed too.

[Scorpion1]

Yea my buddy and I were comparing my 3.8 and his 4.6 engine bay nd weights ect. ect. and Ive decided Im just gonna hit up the local yards to see if I cant find a 3.8 and build that from the ground up. If I can find one at one of the local U Pull Its on a SPECIALS day I could most likely pick it up for about $60. The only real issue is finding a trans thats good for over 600hp. Chances are Ill be shooting for low 800's and see just how far I can get with it. Though if the transmissions going to limit me to 500 I may just have to give up there, which would suck.

[SimplyOrange]

suspension is fine, and kmember is fine, wiring harness, ecm amd motr/trans,and fuel system has to be swapped..for a sohc, its fairly cheap to aquire parts

[Scorpion1]

I thought the factory GT 5spd could swap into the V6 and vice versa? or is the T5 and T45 both V6 transmissions? whats the diff.

[VCS_SSSTANG]

Don't do a 4.6L swap, its not worth it cost wise: Sell your car and buy a GT.

[RyansQuick6]

Get an 8.8, a spec clutch, long tubes, and slap an Eaton M112 on there. Most cost effective means of Forced Induction.

[Scorpion1]

well I dont trust the high mileage on the motor thats in the car to hold up for a long enough time so Im digging through the junkyards for a 3.8 block, heads and crank, or do they make forged cranks for the 3.8? Im building a fresh forged motor.

[RyansQuick6]

A stock 4.2 crank will probably hold more power than you're willing to pay for.

[Scorpion1]

well Im planning on spanning the build out over the next year or two, if I get antsy Ill throw on a 50 shot and a tune until the new motors ready but I want to do it right the first time. So while Im digging I should look for a 4.2 crank for the 3.8 and have it turned?