Differential Question
#1
Newbie
Thread Starter
Differential Question
Hi, I’ve been looking over different threads and the answer has been “switch to an s4 turbo ii diff”.
its 2021, and I live in Florida.
I don’t think many turbo II diffs are left, and I need other options as I’m almost done with my 1j swap.
Is there any way to make the n/a diff stronger by dropping an lsd, like a kaaz(or other) diff?
or should I go with the ford 8.8 route?
(edit: I forgot to mention that I’m pushing about 500whp.)
Any comments would be very much appreciated.
And if anyone is selling a complete s4 turbo ii diff pm me.
its 2021, and I live in Florida.
I don’t think many turbo II diffs are left, and I need other options as I’m almost done with my 1j swap.
Is there any way to make the n/a diff stronger by dropping an lsd, like a kaaz(or other) diff?
or should I go with the ford 8.8 route?
(edit: I forgot to mention that I’m pushing about 500whp.)
Any comments would be very much appreciated.
And if anyone is selling a complete s4 turbo ii diff pm me.
Last edited by kidvulture; 10-05-21 at 08:53 AM.
#2
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there are diffs for the NA, Kaaz, OS Geiken, i'm not sure they make things much stronger though. also the 6 cylinder might be more gentle than the rotary, so you're probably still making too much power, but it'll hang in longer than it is was a hig power rotary
#4
Rotary Enthusiast
iTrader: (23)
I had a buddy running a kaaz n/a diff with a stock 1jz with 3” exhaust and it survived. Iirc, it’s not the differential that blows up, it’s the stub shafts which shear.
fwiw, I’d recommend going with a t2 drivetrain. You can run Mazda 929 axles, and t2 stuff is way more beefy than N/A.
Ive ran a s4 t2 clutch diff which I shimmed with mazdaspeed oversized thrust washers and added coke can shims and it worked great. Moved to a welded s5 t2 diff, and now on a s4 t2 with an ATS Deftforce 2 way and it’s money. Dedicated Drift build.
fwiw, I’d recommend going with a t2 drivetrain. You can run Mazda 929 axles, and t2 stuff is way more beefy than N/A.
Ive ran a s4 t2 clutch diff which I shimmed with mazdaspeed oversized thrust washers and added coke can shims and it worked great. Moved to a welded s5 t2 diff, and now on a s4 t2 with an ATS Deftforce 2 way and it’s money. Dedicated Drift build.
#6
Information Regurgitator
What is your budget? If budget allows go for the Ford 8.8. Then you can use an LSD for a Mustang, which gives you more options. Not just in LSD's but in gearing choices as well since your no longer tied to the long pinon setup of the FC. You then could buy gearsets from Summit or Jegs. It's the route I would've went if I had the money at the time I did my rear end swap. If not TII rears still pop up from time to time.
#7
Tear you apart
iTrader: (10)
What is your budget? If budget allows go for the Ford 8.8. Then you can use an LSD for a Mustang, which gives you more options. Not just in LSD's but in gearing choices as well since your no longer tied to the long pinon setup of the FC. You then could buy gearsets from Summit or Jegs. It's the route I would've went if I had the money at the time I did my rear end swap. If not TII rears still pop up from time to time.
Granny's Speedshop has options for a straight axle 8.8.
You can change the ratios super easily as well, depending on your power levels, you may need it .
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#8
Smells like 2 stroke.
I sheared a stub shaft on a stock N/A S4 with 170k miles on the clock. One clutch dump in 1st gear at 6k RPM on textured concrete and it was new rear diff time. I was young and dumb.
I'd shy away from trying to bullet-proof the stock rear diff.
I'd shy away from trying to bullet-proof the stock rear diff.
#9
Information Regurgitator
https://www.summitracing.com/search/...model/explorer
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