So as many of you have seen Im going to be doing a TII swap in the future. I want to do the swap properly, but funds are kind of limited. So I was wondering, how much my power my S4 differential could hold? Because I'd rather not have to swap out the entire rear end. I dont plan on running more than stock boost for a good while, and I would probably upgrade to a KAAZ or Cusco diff eventually.

In short:

Plan A: TII engine + TII Tranny + Mazdatrix Driveshaft+ N/A Diff (eventual upgrade)
Plan B: TII engine + TII Tranny + TII Rear end conversion

Opinions please.

Also, what about just upgrading the internals of the diff.?

 

The n/a diff can take a beating, but you can't launch on it with sticky tires.

Least thats what I have heard.

 

Well it's my DD and I drift on occasion. Think it'll hold up?

 

Damn U beat me to this thread kinch, I was thinking of doing the same thing.

 

Hahaha, well I searched around and didnt see anything so I thought I might as well do it.

 

I can say a buddy of mine had a supercharged turbo motor and his n/a diff blew up when he launched at 180whp. Other then that it seemed fine including a couple of auto-xs. He now runs a welded n/a diff and it has stayed together.

I would strongly recommend upgrading to a turbo dif to avoid the worry factor or at least get some n/a spares.

 

Also what about upgrading the internals on the stock diff. as Kinch stated above?
I don't have a n/a lsd

 

Hm... the TII diff, half shalfs and drive shaft are just a bit more than just the mazdatrix driveshaft (looked on eBay and around the forums). Is there and major modifications that need to be done or will its just drop in?

 

I have an S5 TII motor/trans/ then I have a TII driveshaft the all I did was redrill the end of it to match to the NA rear( hubcentric so its balanced) And ive been beating the **** out of it for a few months and it still locks fine.

Are you friends with this guy Craig from pittsburgh? His myspace name is "the easy slider"?

 

Easy swap, take out the rear subframe, change the diff and halfshafts, put subframe back in.

 

^^^

what he said... I would look for an S4TII diff if your going to drift it. It is the clutch-type and is know to be strong. a bunch of the V8 guys run that diff.

 

This is my S4 NA LSD diff. It was a replacement for a non lsd diff I destroyed. Drove on the street for several years. Numerous AutoX, several Open Track days and two runs at the drags. The next day at the AutoX it did this on the first run.
I have ~165hp to the wheels on a Street port with RB Street headers and 2.5" single pipe straight exhaust.








If you are going to spend the money on a driveshaft to adapt to the NA diff. I would suggest putting that money towards the turbo diff to begin with. If you are lucky you may find a parts car for less than the individual parts will cost.

 

You could always leave the N/A trans + driveshaft,diff,etc in until you get the TII components. It'll save you some money b/c you won't have to buy the mazdatrix driveshaft. That's what I did. Just dont beat on it tooo hard. Then when you get the TII components swap it all in at once.

 

everybody here basically has the same good advice,
wait till you get the good componets, and do it right the first time, because if you dont something that you take for granite and dont change with the rest of the swap will end up giving you a problem unexpectedly.

 

i ran 600 passes or so on a n/a diff with about 160whp and drag radials (5k launches) never had a problem.

 

You probably had no axle hop. All it took was one launch with bad axle hop to damage the diff. Damaged it enough that the next day with hard driving blew it to shreds.

As far as the N/A transmission goes. I have broken 2nd gear twice. Once the gear lost two teeth, the second time the counter shaft lost teeth. I have also broken teeth on first gear at an AutoX from a hard launch.

 

Yeah I am, he's a cool guy. He installed my coilovers and DTSS eliminators with me.

 

That's what I had thought about doing, but I'd have to upgrade my clutch to deal with the power of the TII

 

I think I'm gonna go with the full swap. Just to be on the safe side of things.

Also, do I need an aftermarket BOV? Cause if not, that'll save me some money.

 

When I did my swap I didnt put an aftermarket bov on, just wastegate.

The reason I asked is becasue I was trying to set up a meet somewhere with you guys and a few people from out this way. Let me know if your interested

 

Ah ok.

And yeah, that'd be cool. Just let me know.

 

Also, does anybody have an S4 TII Diff and Half Shafts for sale?

 

OK, well he has my number just talk to him and have him give me a call. I think he said his car was going under in october. So we can make it before then.

 

Alright, cool. I hope we can meet up soon.