DP rear axle assembly
 

I think you will see something like this on the tech section, but a reminder to DP racers. The 9" rear is legal in a V10 car or a new 426 Car only, otherwise the 8 3/4 or Dana and the 9 1/4 or 8 1/4 if you are really brave are the accepted rear axles for these cars. Don't want anyone to show up and have a problem. This is for Stock Eliminator. From your roving reporter.

Re: DP rear axle assembly
 

If anybody needs a 9" out of a 2011 Drag Pak, I have one that I don't need. I took it out when I tubbed the car. Includes axles.

Re: DP rear axle assembly
 

For the super brave I have a NOS in the box sure-grip for the 8 1/4...I wouldn't do it but you could....the 9 1/4 will not work due to lack of Spool and gear choices.....but you could run it with a sure grip, I run a nice detroit locker in the Lil Red this way.

8.75 and dana 60 are your logical choices, more gear choices for the dana 60 and of course it will live behind any of the DP motors, whether or not you gain any ET with a 8.75 is a consideration, as is your tranny if the ring and pinion goes.

Re: DP rear axle assembly
 

Wasn't there a SS/AA Cuda racer here in the southeast that ran a 9 1/4 rear? He later tried Pro Stock - Maybe a Duster, then Volare. X&*#@* I can't think of his name. (Not Bagwell.)

A Dana 60 is actually a pretty efficient rear due to the ring & pinion orientation. 12 bolt is the best and 9" the worst. There was a magazine article about it years ago. I've heard of some racers switch between the Dana 60 and 8 3/4", adjusting the overall weight, and didn't see any ET difference worth mentioning.

Re: DP rear axle assembly
 

Myron
Are you thinking of Jim Kinnett? I know he ran a 12 bolt gm but don't remember the 9 1/4.

Re: DP rear axle assembly
 

Yes, Jim Kinnett. I suppose someone could have confused the 2 rears. I didn't see it myself. Thank you for clarifying that.

Re: DP rear axle assembly
 

To reinforce what Myron was saying, we went from a 8 3/4 to a Dana 60 many years ago and in spite of the additional weight no change in ETs. The only real difference is that it quit spitting the gear out after trips thru a dip that was in the left lane in Tulsa at the time.
Bill

Re: DP rear axle assembly
 

Jeff, That would make a 9" legal in an 09 or 10 DP with the 426, but illegal with all other engines.
And the reason ?

Re: DP rear axle assembly
 

There was no 426 or 9" in the 09 and 10. Not till 11.

Re: DP rear axle assembly
 

Any DP with a 426 Aluminum motor is a 2011.

Re: DP rear axle assembly
 

The upgrade is for the 2009 or2010 not for the 2011 is what I was told.
Dan

Re: DP rear axle assembly
 

The NHRA rule book in Stock states; "Original rear end may be replaced with another from the same automobile manufacturer; truck rear end prohibited."

2009 and 2010 Drag Pak Challengers originally came with NO rear end so a racer of one of these cars isn't replacing the original rear end, simply installing it. The only rear end this automobile manufacturer ever spec'ed for a Drag Pak Challenger is in the Mopar parts system listed as part number P5155850.

Automobile manufacturers purchase most axle assemblies from suppliers like AAM and Dana. Mopar contracted Dana to build a Dana 60 for automobile use (NHRA prohibits the use of truck rear ends) and this was some 45 years ago. Mopar put a part number on it and used it in their muscle cars for a few years making it legal for use in NHRA Stock. Mopar never owned Dana Corp. and didn't manufacture the axle they just bought special Dana 60 rear axles from Dana and assigned a part number to it thus making it legal by NHRA.

Mopar part number P5155850 is the only part number Mopar list as a rear end for a Drag Pak. It is manufactured by an aftermarket automotive supplier and is in fact the original rear end spec'ed for a Drag Pak since NO rear end came in a 2009 or 2010 Drag Pak from Dodge. It is BTW the very same Strange Nine used in all of the factory hotrods being built today. Cobra Jet Mustang, COPO Camaro and yes, Drag Pak Challenger.

The P5155850 was put into the Mopar parts system in 2010 and anyone can check with Mopar or online to verify the info above. This Strange Nine rear axle has been approved by the NHRA for all 3 brands factory race cars. This is obvious when reading the 3rd paragraph in section 8-Stock in the NHRA Rule Book. "OEM may apply for inclusion of any special production runs into the Official NHRA Stock Car Classification Guide." If the NHRA didn't approve it then how did the Drag Pak make it into the Classification Guide? Call it a Nine Inch, call it an 8 & 4 quarters or call it a P5155850. I sure hope this clears things up!

Re: DP rear axle assembly
 

Never mind this is a rear end thread ...

Ron




Since I have not seen one does the engine and manifold assembly fit under the aluminum V10 hood
In other words does it have the tall DP manifold with a fuel injection throttle body?

Re: DP rear axle assembly
 

I remember reading that Rick Johnson ran, and may still run a 9 1/4 Mopar axle in his SS/AA Barracuda.

Re: DP rear axle assembly
 

Amen Mike...

Re: DP rear axle assembly
 

Mike
Taking what you added one step beyond....Would this 9" being in all three factory racecars then open the 9" up for use in any GM, Ford and Mopar in Stock? It would appear at least for any Mopar since it has an actual Mopar PN and came in a Mopar. Or would you have to use a Strange9 since they are the original manuf of the rear, not Ford?

Re: DP rear axle assembly
 

Don't get carried away with words. A 512 V10 and a 426 all aluminum engine are both 2011 models and can run the 9" axle. The 2009 5.7, 5.9, 6.1 and 6.4 can't run the 9". And the 2010. No 9" for the motors I just listed. The 5.7;, 5.9, 6.1 and 6.4 can't run the 9".

Re: DP rear axle assembly
 

But all we have is words. NHRA writes them and we try to figure out what they mean. As the rules are written, where is my logic wrong in my earlier post? The strange9 being offered in a Mopar and having a Mopar PN should make it legal. But then I'm not sure logic is always used rule application, not to mention my logic has been flawed in the past at least once, maybe more.

Re: DP rear axle assembly
 

It was Jim Kinnett. I actually have pictures of the 12 bolt in that car somewhere. It was in the Volare'. Jim

.

Re: DP rear axle assembly
 

The TI sheet for the 2011 V10 and the 2011 426 allow a 9" rear axle. This is what NHRA approved. Really pretty simple. The TI sheet is what manufacturers submit to NHRA for approval for specific approval of a car/engine combo. Anyway this is for information only. Do what you want.

Re: DP rear axle assembly
 

Jeff
I agree with everything you have written. The old techman in me is just trying to wrap my little brain around how this then applies to the rest of the Mopar fleet. It would seem that once the Strange9 was submitted on the TI and approved it then became "another from the same automobile manufacturer" as the rulebook requires to then be allowed for all Mopar stock racecars. Much the same as Mike described the Dana. Both built by an outside manufacturer and accepted in a car (Strange9) or cars (Dana) by NHRA and therefor would seem to be accepted in all Mopars as the Dana is. Again, where is my logic flawed?

Re: DP rear axle assembly
 

This issue needs to be clarrified by the NHRA in the published rules. When I started on my 2010 Camaro, I was told that I could not run the 9 inch. I have also been told that a 12-bolt would be OK in my COPO.

Re: DP rear axle assembly
 

This is not rear axel related but since we are talking "years" --

Did MOPAR/NHRA authorize the lift off hood with a scoop to accommodate the 426

It did not come on the 2011 V10 Drag Pak

They must have ,,, LOL

So we cannot just swap out the V10 without changing the hood - could loose some weight

Ron

Re: DP rear axle assembly
 

Nobody has any flawed thinking, but from NHRA, that is what is accepted. The 9" was specific to the V10 car and now also to the 426 car. NHRA has not accepted the 'any corporate' yet for the 9" in other cars. I was just presenting what I have from NHRA after a racer complained to me about the subject and I inquired. I would hate to see one of my fellow Stock racers show up and be turned away especially at Indy because of this item. It's a whole lot easier to address before you leave to go. Pretty simple.

Re: DP rear axle assembly
 

I believe Mike has this completely correct.

Call it what you want, or what year you want, but the part number is there.

I realize Jeff's point but NHRA needs to get this right....whats good for the goose, is good for the gander. (my Dad would have said.)

Hell, the 8 3/4 is a 9" housing anyway! And I'm sure theres no advantage either way other that life.

A good lawyer 's letter (where's Cambria when we need him) would certainly straighten this out fast.


FJ

Re: DP rear axle assembly
 

I hear what you are saying, but Jeff is right. The NHRA, to this point, looks at the new (FX) cars differently. They really do need to publish a clarification.

Re: DP rear axle assembly
 

It was my understanding that all the "NEW" cars (Ford, Mopar and Chev) get to run the 9" Ford with either the cast iron or ALUMINUM case................

The old rule about replacing a Factory rear end with another Factory rear end that was listed in the Factory parts list is not allowable at present.

Strange had a Aluminum case for the 9" listed in the Ford parts list and it was accepted by NHRA for about 20 years, now the only cars that can run the aforementioned case are only cars that were available from the Factory with the Aluminium case.

So let me see if I can get this straight....As of now I can't run an Aluminum case in my Pre 2008 Stocker (9") because it was not available from the Factory, but a Post 2008 Non-FORD car can???

Yeah, makes perfect sense too me.

I am not changing my r/e case for Indy.

Luv ya Jeff!!

RJ

Re: DP rear axle assembly
 

I completely agree with MPR, but would like to add one clarification as I understand it:
The new cars (CJ DP COPO) fit into the "inclusion" rule at the beginning of the Stock rulebook correct?
Just because it was permitted on an "inclusion" car does not mean that it will be permitted on a non inclusion car.
For example: you cannot put a S9 COPO rear axle housing in your 1969 Camaro A/SA, nor can you put an aluminum center section in your 1968 Mustang.

See you at the races,
Wayne Kerr

Re: DP rear axle assembly
 

The 2009 and 2010 DP's were never allowed a 9" rear. The 2011 512 was as it was standard, and the specs for the 2011 426 car have it as standard. Doesn't apply to Fords, Chevys, Hudsons, Kiaser-Fraser, Fiats, Volvos,Lexuses,and several others. It does, however, apply to the 37 Hupmobile with the aluminum Gen III Hemi. This is not Swamp Science. And RJ, nobody cares what you do, well maybe some other Texans. I mean really, if you don't like this, then show up with the 9", tell the tech person "Look under my car. I have a 9" Ford type rear axle assembly. That's ok Huh???" The 38 Hudson Fastback is ok but only in red. Geeeeeee. Try to help someone drowning and they want to tell you how to swim.

Re: DP rear axle assembly
 

Mr Jeff, you can lead a horse to water but some will just not drink!! No matter how thirsty they are???

Re: DP rear axle assembly
 

Hey Jeff, sorry about my post I apoligize. Just venting about not being able to run the aluminum case and all the Non-Ford New cars can.

Reading back through all the posts it looks like its a real mess. I thought all the DP's got the 9" Ford. Hope it all works out for the Mopar camp....maybe NHRA will compensate and take some HP off .


RJ

Re: DP rear axle assembly
 

There is a simple answer to the rear end problem. Make the stock and super stock rule on rear ends the same. Any rear end.

Re: DP rear axle assembly
 

Tony, you are right. And I certainly favor that, but as of August 12,2013 we got this. My intentions are honorable. RJ, I could never get angry with you. We are both too old.

Re: DP rear axle assembly
 

In all sincereity, I was just trying to help and have a little fun. Seems like you were preaching to the choir, everybody heard you, but know body was believing.

You go out of your way to prepare people for the inevitable and ...................

Anyway have a safe trip, see you in Indy....Oh am I still allowed to visit the compound for refreshment and fellowship??


RJ

Re: DP rear axle assembly
 

RJ, you are always welcome. Your unique outlook on life is too good to let go by, and of course there are the beverages.

Re: DP rear axle assembly
 

I think I have some credibility in this, all of the "exception vehicles" DP, CJ, and COPO in Stock had to be submitted and approved by NHRA with a complete and full list of components. The 11 V10 DP was built and spec'd with the 9", hence only the 11 DP can use this assembly. The same as with all of the unique components on this car. These exception vehicles have a unique component spec sheet that applies to that vehicle only.
MPR is correct in that the 09 and 10 DP did not come with a solid rear axle but the solid axle conversion had to be approved prior to its release. The then current approved rear axles were allowed, 8 3/4, Dana 60, 9 1/4.

Re: DP rear axle assembly
 

Dan look in the Stock Car guide... Now the 426 is in the 2009's and 2010's... Not the 2011... They have changed their minds so many times.... I'm not sure what we have.... But I do know the 9" is legal with the 426.... So I think you are right.....

Re: DP rear axle assembly
 

Mack
But if you look in the engine blueprint section the 426 is only in 2011, not 09 and 10. And its yellow highlighted in the 2011 like it is a recent change. Who knows?

Re: DP rear axle assembly
 

Stewart, I looked this morning and it wasn't in the 2011 but it was in both the 2009 and 2010???? So who knows???? Stewart, I'm looking in the Stock Car Classification Guide.... The 426 is in both the 2009 and 2010 in Yellow and a note that says 8-15-13??

Re: DP rear axle assembly
 

Mack
Your right. For some reason they have made changes so the class guide and engine spec guide are opposite on the 426.