Currie Rock Jock?

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Currie Rock Jock?

Postby ANDY » Sat Feb 26, 2011 2:58 pm

I really need a bigger axle in the back of my CJ7. It's heavy and it likes to stand on it's back wheels and hop on steep inclines. I know you web wheelers read alot of info about parts. They seem like a pretty decent price(for a custom 60) if you go with the Rock Jock 3 housing. Opinions?
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Postby GreenJPTJ » Sat Feb 26, 2011 5:04 pm

I have looked at those myself but never anywhere close to pulling the trigger. They look pretty good to me and a lot of KOH racers use them without to many problems. There is a lot of talk about them on Pirate 4x4.

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Postby broncomarc » Sat Feb 26, 2011 7:34 pm

Shaved 9" with 40 spline axles. Lighter, cheaper, more clearance and you'll never break them.
- Marc Reiter
1973 Bronco - http://www.broncomarc.com/bronco/

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Postby GreenJPTJ » Sat Feb 26, 2011 7:53 pm

Cheaper? From who?

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Postby broncomarc » Sat Feb 26, 2011 8:56 pm

I've bought a Bronco 9" for $200. Throw in a disc brakes, locker, gears and shafts and I'll bet you can get it for well under $2000.

Looks like the Rockjock 60 housing starts at $1550. A built one is $3600.

I just speced out a spidertrax 9" housing with their full floater setup and 35 spline axles for $1915. Add gears, detroit, 3rd member, and brakes and you're at about $3200 or so.

I'm just a 9" fan. Can't beat it for light weight, clearance and it's very simple to set up the gears.
- Marc Reiter
1973 Bronco - http://www.broncomarc.com/bronco/

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Postby ANDY » Sat Feb 26, 2011 10:08 pm

The only way I could go nine inch is high pinion. A low pinion nine would make my drive shaft too short and at more of an angle than I am now. Adding for a high pinion 3rd member makes the price higher than the Rock Jock.
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Postby GreenJPTJ » Sat Feb 26, 2011 10:31 pm

I was thinking the same thing as Andy. Low pinion is pretty much out for short wheelbase rigs. A True HI9 third is a little of 2k by itself and add that to a Spidertax roller at $1900. I don't know how much a Currie high pinion goes for maybe that is an option.

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Postby eddie platt » Sun Feb 27, 2011 10:12 am

im going with marc on this one.

surely you can get a fabbed housing from ballistic or spider w/ semi float with a currie high pinion third for less than 2k.

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Postby ANDY » Sun Feb 27, 2011 12:00 pm

Here is the quote I got from Currie. I would do something different on the brakes. They were out of the Explorer brakes ayt the time.


1 CE-2001L 9-PLUS HEAVY DUTY HOUSING - NOTCHED STYLE COVER $439.95 $439.95
1 CE-0012 CURRIE PERFORMANCE AXLE PACKAGE $459.95 $459.95
1 CE-0102 WELD ON SPRING PADS - UNIVERSAL GM OR TRUCK STYLE $32.95 $32.95
1 CE-7000A SPRING PADS - 3.00 INCH X 2.25 INCH - PAIR $19.95 $19.95
1 3M-CHP456R31DLHXI Currie Hi Pinion (CHP) 4.56R Ratio - 31 Spline - Detroit Locker (DL) Diff. - CHP 3.250 (H) Case - N/A (X) Pin Sup - 1310 Comp Fl (I) Yoke $1,635.70 $1,635.70
1 CE-6011A SPORT TRUCK DISC BRAKE $789.95 $789.95
1 CE-0118 LABSRVC - ASSEMBLE REAREND (INSTALL THIRD MEMBER AND AXLES) $99.95 $99.95



FREIGHT: $0.00 SALES TAX: $0.00
COST OF PARTS: $3,378.45 TOTAL: $3,478.40
SURCHARGE: $0.00 LESS DEPOSIT: $0.00
COST OF LABOR: $99.95 AMOUNT DUE: $3,478.40


ORDER 698999 Printed on:7/19/2010 4:25:05 PM
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Postby ANDY » Sun Feb 27, 2011 12:05 pm

Dynatracs Quote:
Attachments
file___C__Documents and Settings_Andy_Local Settings_Temporary .pdf
(32.12 KiB) Downloaded 335 times
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Postby broncomarc » Sun Feb 27, 2011 12:48 pm

Yea.. the only downside of the 9" is the low low pinion. It does help with strength though. It makes the pinion more like a worm gear.

I forgot how the drivetrain of the jeep is shifted back from the Bronco setup. They both have the same wheelbase, but the Bronco has a long rear driveshaft and a short front one.

The only downside of the the Currie High pinion 9" is that you're running on the coast side of the gears. They recommend a tire size limit of around 35". I ran mine in the rear with 36" tires for a couple years with no issues. It's in my front end now so it's running on the right side of the gears.


If you're looking to spend that kind of money, I would do this:
Spidertrax rear roller - 3" OD 1/4" wall tube, 5 on 5.5" full floater - $1415
Spidertrax 35 spline 4340 shafts - $500
Spidertrax shaft seals $60
True Hi 9 complete 3rd member with 35 spline Detroit - $2269

That's $4244 without brakes and spring pads. I'm not sure what kind of rotors the full floaters need, but you can do weld on brackets for dirt cheap, and if you don't need a parking brake, calipers are pretty cheap too.
- Marc Reiter
1973 Bronco - http://www.broncomarc.com/bronco/

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Postby ANDY » Sun Feb 27, 2011 3:05 pm

The Rock Jock comes out to about $3700.00 including all the mounts and brakes. It seems like the best value.
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Postby ANDY » Mon Feb 28, 2011 9:39 pm

Two more less expensive options:

Truss my housing and install a 33 spline Detroit and alloy shafts

or

Truss my housing and install a 35 spline ARB and alloy shafts.
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Postby kesterkamp » Mon Feb 28, 2011 10:52 pm

i have a rear shaved dana 60... if you just change the bolt pattern and throw in a locker i think it could work for you.

it has the btf disk brake brackets and 88 chevy brake components...

$75.00
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Postby ANDY » Tue Mar 01, 2011 9:07 am

kesterkamp wrote:i have a rear shaved dana 60... if you just change the bolt pattern and throw in a locker i think it could work for you.

it has the btf disk brake brackets and 88 chevy brake components...

$75.00


I appreciate the offer but I can't use a low pinion 60 for a multitude of reasons.
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