Garrett,

Call you local Ford dealer and ask them about the spline. They'll tell you.

I got the High Performance. Had I known at the time, that there were two styles to choose from, I would have picked the pro. But mine seems to work just fine.

Just make sure the add the friction modifyer when the fill the diff, otherwise the clutches won't work.

Tom

 

Awesome Tom!

Garrett

 

Yes I know I am, thank you.

Are you getting the lsd installed soon?

The shop has my truck right now building the custom drive shaft.

keep your fingers crossed....

tom

 

Oh they are crossed....and yes, I am looking into it, but I did find somewhere cheaper for the hi-per. than steeda...but steeda has the cheapest pro series....so I dunno, lookin into what the final number will be for the SC. Hopefuly soon. Gota get back to work now.

garrett

 

I've actually been researching installing a tennis ball on my antenna. does anyone know if that increases horsepower??

 

Only if the tennis ball is hollow seeing as how that would make a significant weight loss difference. Also, every sticker you add on to your truck (especially lame ones) get you 10 hp's at the wheels. Good luck!

 

Hollow?? How about a "Wiffle" ball...remember those??

ha ha ha

Tom

 

I dyno'ed my truck, and with my raider jack ball, i saw 17 HP at the wheels!! Any way, Tom, whats the major difference between hi-perf. and pro??

 

Supposedly, the Pro is better and engages quicker. But you said it was cheaper? hmf. I don't know. Wait, I guess you need me to do all your work for you....hold on....http://www.auburngear.com/aftermarke...differentials/

There you go, see, everyting is going to be alright..

 

Nice Tom, but I meant is it really worth the money for the amount of HP we would get to? Even on a perfect day, I would guess that my HP would not exceed 320. With that in mind, do I really need an LSD rated to 650 HP?

Garrett

 

Yes, you do Garrett. You need it.

 

I agree with Tom. Consider this, you are building your truck just for nice horsepower gains and stuff. So let's say your truck is pushing 235 rwhp. Would you want your rear diff to be able to hand 250 or 650? ALWAYS in racing (and I'm sure Tom can attest to this) you need to get more than you think you might actually need just in case because if you take care of the problem in the first place, you won't have a busted diff down the line because you compromised a cheaper product...and yes, that was all once big sentence. almost. Does that make more sense? It would suck to buy a cheap-o diff and down the line you may want to get a bigger upgrade, but the diff you bought wouldn't be strong enough. Get one that is tough enough now because you never know what the future may hold.

 

Ah so true...true!

Take V or Z rated tires for instance. A Z rated tire is rated for speeds in excess of 149 mph. Well, why put them on your truck? Your never going to go 149 mph.

Well, i'll tell you why. Because in order for them to design and manufacture a tire that can withstand those speeds and tempuratures, it needs to be 50 times more durable and sticky than a standard, say S rated tire.

If you look at the Tread Ply's on an S rated tire, your lucky if you get 3. a Z rated tire has no less than 6, maybe more with some brands. Plus, the side walls are much much more durable on the higher speed rated tires.

What does this mean?? More stick for one, which makes your truck safer in the rain. Less hydroplaning, which makes your truck safer in the rain. Less prone to flats, because of the 6 tread ply's instead of 3. Less chances for highway blowouts, because of the more sidewall tread ply's and the thicker compound.

So, I didn't by my Kumho's because I wanted to go 149mph. I wanted....Safety, durability, handling, less flat tires, more piece of mind.

Always buy the best product with the highest standards that you can afford, that are in your price bracket, and you can't ever go wrong.

Tom

 

Does any company MAKE Z rated tires in a size for my truck?

265 70R16s?

 

For your tire size, this is the best out there for you.

Click on this link and read the reviews. Excellent reviews and pretty sticky too. Plus they look awsome.

http://www.tirerack.com/tires/tires....omCompare1=yes

tom