NP231/Dana 300 doubler questions

94XJ2door5speed · Feb 17, 2008

Ok i have searched on this site and the Pirate 4x4 sites and havn't gotten a decisive answer. How does the "box 4 rocks" kit actually work? Am i matting a 300 to my stock 231 or the other way around? Am i cutting anything or what i can't really tell. I want it for the twin stick setup on the 300. Do i need a clocking ring, what am i adding or subtracting from my t-case?

jeepnuts311 · Feb 17, 2008

pretty sure the "box4rocks" thing is just the front half of the 231 (the lo-range part) bolted in front of the dana 300 (or another 231)...it included a block off plate and clocking rings

-Tim

Mr.OverKill · Feb 17, 2008

jeepnuts311 said:
pretty sure the "box4rocks" thing is just the front half of the 231 (the lo-range part) bolted in front of the dana 300 (or another 231)...it included a block off plate and clocking rings

-Tim

this is exactly right, i just installed this setup in my rig ( but with a TH400 as i have a SBC 350) the doubler is awsome and the low range on this setup is holy-F#%$ low and i can do front digs as well with the twin sticks!!
i do recomend this setup completely.

94XJ2door5speed · Feb 17, 2008

See now thats what i wanted to hear! Were there any unexpected snags or expenses?

mud1059 · Feb 17, 2008

New driveshafts or modified old ones, TIG welding your original case, the cost of the flip kit, the box4rocks kit, and a D300. Not to mention the man hours that go into trying to get ahold of the guy just to buy one. Just call him religiously, he ignores all other methods. I found out the hard way.

94XJ2door5speed · Feb 17, 2008

ok so what did you use for driveshafts? I can get it welded for free and i wanna source it all before i jump in on the project. Hopefully it can get done when i am in chassi fab coming up here, what did you use for the twin stick setup?

MR. XJ · Feb 18, 2008

where can i get a box4 rocks kit

600dollarxj · Feb 18, 2008

MR. XJ said:
where can i get a box4 rocks kit

Search pirate. The guy is supposed to be pretty hard to get ahold of though.

NP231/Dana 300 doubler questions

94XJ2door5speed

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jeepnuts311

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Mr.OverKill

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94XJ2door5speed

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mud1059

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94XJ2door5speed

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MR. XJ

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600dollarxj

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