12 bolt 9" ??
12 bolt 9" ?? I am getting ready to buy a rear for my Z. I was talking to a local performance shop and he told me about this 12bolt 9" that is lighter/more efficient. Will this work on our cars with a moser 9" housing, if so I am buying one. Check it out: 
Originally Posted by glennhl
OK, I'll take the bait. Why is this better than a plain ole 12 bolt?
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It is better due to the fact that the axle tubes are independant of the center carrier.
Why is this important ?? Well..... in a rear loaded differential like a 12 bolt, 10 bolt, DANA 44 and so on..... when you launch the chassis, the tubes bend forward from loaded traction. When that happends, it unloads the carrier bearings (the preload goes away) which opens up the gear lash and in turn..... it runs the gear set enguagement on a different place on the gear tooth. Well.... if you havent guess it...... this tends to break parts.
You can also negative camber the rear end, use differential coolers without some silly fabrication and run semi or full floater axle shafts.
Yes, they are street worthy. I have installed quite a few of these in clienst cars. And yes, it will facilitate 3 and 4 channel ABS/Traction control if you take the time and make the choice to mount the center VSS sensor.
Why is this important ?? Well..... in a rear loaded differential like a 12 bolt, 10 bolt, DANA 44 and so on..... when you launch the chassis, the tubes bend forward from loaded traction. When that happends, it unloads the carrier bearings (the preload goes away) which opens up the gear lash and in turn..... it runs the gear set enguagement on a different place on the gear tooth. Well.... if you havent guess it...... this tends to break parts.
- It is more efficient from the pinion center line.
- It is also lighter.
- It makes gear swaps eaiser.
- The adjustments are eaiser to perform.
- And last but not least.... it still is considered a GM part.... for the diehard GM cats out there.
You can also negative camber the rear end, use differential coolers without some silly fabrication and run semi or full floater axle shafts.
Yes, they are street worthy. I have installed quite a few of these in clienst cars. And yes, it will facilitate 3 and 4 channel ABS/Traction control if you take the time and make the choice to mount the center VSS sensor.
There was a thread about this type of center section not to long ago. A few guys had ran them and destroyed them similiar to what they where doing to their 12 bolts. Just an fyi. I have never actually used one myself to comment.
CMC
CMC
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Originally Posted by SS2win
I just talked to strange and they said that it was designed for a 1800 pound car. the aluminum centersection will flex and gear life will be significantly reduced.
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Wow, I guess the Ford alloy third members are junk for anything over 1800 lbs as well...... geeze, thats a bummer. I guess the guys that have been running these things for 12+ years in 3000+ lb cars are gonna have to replace them ??
At least the manufacturer told you what they will claim the product is good for and probably good that they severly underrated it in their statement. Its kinda funny that alloy third members have been around for years..... and they forgot to tell people that they flex and reduce gear life.
At least the manufacturer told you what they will claim the product is good for and probably good that they severly underrated it in their statement. Its kinda funny that alloy third members have been around for years..... and they forgot to tell people that they flex and reduce gear life.
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Originally Posted by SS2win
RU talking about 12-bolt dropouts or standard aluminum 9" centers?
I have been using alloy thirds for 15+ years in Land Speed Record events, NHRA/IHRA, SCCA, NASCAR and SCORE off road classes and havent had any of the discussed problems. What you will have problems with, is the pinion support and the main caps and fastners failing. To this note, I am even going to be releasing 3.00" to 3.250" cases that are carved out of a solid billet of 6061, 7075 or Ti-6/4 (you actually have a choice) on a 7 axis CNC machine. These should close the market for application up to and over 2500hp.
Originally Posted by Mark98SS
This appears to be a center for a 9" housing with a GM style 12 bolt ring, pinion & carrier?
Originally Posted by chicane
Both.
I have been using alloy thirds for 15+ years in Land Speed Record events, ...
I have been using alloy thirds for 15+ years in Land Speed Record events, ...
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Originally Posted by SS2win
So do you thing the strange would work on a street car that is autocrossed occasionally? how about pushing 150+ for 100 miles?
Why would strange lie and not want to sell something?
I like the pocket bearing on the end of the pinion on the 9 inch I seriously think being worried about parasatic drivetrain loss in one of these cars is not nessicary...so what if you loose a few HP at the wheels.. Nextel cup cars all run 9 inch's and most have drivetrain loss in the 10% area some times a ittle better If a 9 inch isnt good enough I know some guys that will build a 10 inch ford...
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From: Las Vegas
Originally Posted by SS2win
So do you thing the strange would work on a street car that is autocrossed occasionally? how about pushing 150+ for 100 miles?
That piece won't last, it's too weak.
Strange didnt lie........ TECH Apprentice
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Strange engineering is in the business of selling parts correct?
Why would they tell someone a certain part wouldn't work, if in fact it would work? I guess they don't want to make a sale.
Go on and buy it. Good luck
Why would they tell someone a certain part wouldn't work, if in fact it would work? I guess they don't want to make a sale.
Go on and buy it. Good luck
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Originally Posted by SS2win
Strange said it would work but the life expectancy of the gears would be diminished. By how much? who knows. I'd like to hear from someone who has run one.
That piece is for light weight tube chassis comp cars.