DP rear axle assembly

[Myron Piatek]

Originally Posted by Stewart Way

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

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

[340Cuda]

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

[DonatoEng]

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 ?

[Stewart Way]

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

[Jeff Teuton]

Any DP with a 426 Aluminum motor is a 2011.

[Dan Wilson]

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

[MPR]

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!

[Mack Reeves]

Originally Posted by Dan Wilson

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

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.....

[Andys dad]

Originally Posted by Jeff Teuton

Any DP with a 426 Aluminum motor is a 2011.

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?

[Jim Wahl]

Originally Posted by Myron Piatek

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

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

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