Suggestion for axle upgrade. - Toyota FJ Cruiser Forum
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post #1 of 46 (permalink) Old 02-14-2017, 09:16 PM Thread Starter
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Suggestion for axle upgrade.

Currently running 315 duratracs which are close to 34.6". I daily drive the FJ for the most part but plan on averaging 3-4 trips a year. I was initially looking into just a basic nitro regear to 4.56 and add a front arb locker but after reading about all the blown diffs that the 8" are known for...well I don't want to have to deal with that while out on the trail..and I'm not that gentle on the skinny pedal either.

What would be the best setup for the price? I guess price wise...no more than $8k including lockers?

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post #2 of 46 (permalink) Old 02-14-2017, 10:03 PM
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Re: Suggestion for axle upgrade.

Diamond Axles - Welcome

Been running Brian's axles for 10 years and couldn't be happier with them. If you call Brian and talk to him he'll help you choose your gears and which setup to go with... I run a Land Cruiser 9.5" rear with an ARB. Can't count the number of times through the Rubicon, trips to the Hammers, Moab, etc. Good luck with the build.
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post #3 of 46 (permalink) Old 02-15-2017, 08:37 AM
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Re: Suggestion for axle upgrade.

If you change the axles to harder ones, your weak point becomes the Diff... I prefer to break an axle more than a diff in trail...
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post #4 of 46 (permalink) Old 02-15-2017, 08:45 AM
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Re: Suggestion for axle upgrade.

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Cholerabob previously said: View Post
If you change the axles to harder ones, your weak point becomes the Diff... I prefer to break an axle more than a diff in trail...
I believe he means a full differential upgrade. The entire rear end.

There are a lot of options to choose from under $8k.
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post #5 of 46 (permalink) Old 02-15-2017, 08:52 AM
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Re: Suggestion for axle upgrade.

I drool over the currie RockJock 60 and the Currie F9 axles for the FJ rears. They use all the factory mounts and let you use the stock rotors, hubs, and retain the stock bolt pattern. I've seen a couple floating around here on the forum.

Currie RJ60 - $2,485
Currie F9 - $2,485

Currie Rockjock III Install On 4Th Gen 4runner
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post #6 of 46 (permalink) Old 02-15-2017, 09:06 AM
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Re: Suggestion for axle upgrade.

I recently installed a Currie RockJock60. Main reason I went with it over the F9 was ground clearance. F9 is easier to repair if you break the diff, since it used a 3rd member like the FJ that pulls out the front. But hopefully with the upgrade I won't ever break it.

Main advantage to Currie is it includes all the factory mounts, retains factory ABS and brakes and can be installed 95% in your driveway. Only thing I did was take the new axles, bearings, and my backing plates to a shop to have them pressed on. I would recommend talking to Currie and see if they can mount new backing plates with the bearings to the axles before they ship it to you. If not at least buy new backing plates from Toyota. This would make the job way easier. Getting the stock brakes off the stock axles is easy, getting the backing plates off the axles is a PITA.

Another option is Front Range Off-Road, which offers a 9.5 Diamond Axle complete with all the factory mounting plates for the FJ. I imagine they'd set it up for you with gears and everything. Not sure what axles it uses, but I'd definitely recommend 35 spline axles.

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post #7 of 46 (permalink) Old 02-15-2017, 02:17 PM Thread Starter
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Re: Suggestion for axle upgrade.

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Iconic_ previously said: View Post
I believe he means a full differential upgrade. The entire rear end.

There are a lot of options to choose from under $8k.
Correct, the full assembly including diff. I was initially looking into swapping it out with the 8.2" assembly but after pricing it out...~$2000 for used rear assembly plus another $800 or so for re-gear.

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post #8 of 46 (permalink) Old 02-15-2017, 02:32 PM
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Re: Suggestion for axle upgrade.

Quote:
equalme previously said: View Post
Correct, the full assembly including diff. I was initially looking into swapping it out with the 8.2" assembly but after pricing it out...~$2000 for used rear assembly plus another $800 or so for re-gear.
You're going to spend twice that on an aftermarket axle. Just something to keep in mind.

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-TRDparts4U
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post #9 of 46 (permalink) Old 02-15-2017, 06:08 PM
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Re: Suggestion for axle upgrade.

I think your on the right track thinking aftermarket. An 8.2 is hard to find at a reasonable price, if I were to do it I would likely just go "all-in" with one of the suggestions above. I was told when I was looking at options since I blew my rear diff, Front Range Offroad would sell me "a 9.5" diff with ARB locker, choice of gear ratio, with pinion flange to bolt to your driveshaft, and pinion spacer installed, about $1950." Add the cost of the housing and your at about $4100
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post #10 of 46 (permalink) Old 02-15-2017, 11:48 PM Thread Starter
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Re: Suggestion for axle upgrade.

Thanks for the help all!

Any reason not to go with the Diamond axle vs the RJ 60?

I'm assuming on the front end there really isn't much I can do to it other than a re-gear and locker or go all out on a SA which is way out of my budget.

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