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post #1 of (permalink) Old 04-19-2004, 11:38 PM Thread Starter
 
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axle gearing...

Got a couple of ques but first. I have a rear toyota Fj60 axle and a front toyota pickup axle, my dilemma is that the front has 4.10's and the rear has 3.73's. Now all my mud buddies are all about keeping that ratio given the power division at the transfer case leaves the front slightly weaker (like a 40-60 split right?) so the minor gearing increase helps it spin up more faster and more adequate. However, I'd really also like to get into some rock crawling, given that said someone tried to tell me that small of a jump shouldnt hurt anything but I would really just like to make sure. So what do ya think? Should I just slap a FJ40 diff in it and get'r done or keep on rolling with the minor offset?

P.S. Also, when buying the Firebird Master Cylinder, do you get the front discs rear drums or the 4 wheel discs or what????
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post #2 of (permalink) Old 04-20-2004, 10:18 AM
 
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Re: axle gearing...

Billy, 10% isnt minor except to maybe a mudder. For solid surfaces 1-2% is all you
should allow, so 4.10-4.11 or 3.54-3.56, (a common Ford ratio split) isn't an issue.
With 10% you will start breaking Ujoints and twisting drive shafts.
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post #3 of (permalink) Old 04-20-2004, 10:36 AM
 
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Re: axle gearing...

I would sell the FJ60 rear end and buy one out of a mini truck. Around here you can find mini truck axles for $100, which is less than a R&P and probably less than what you can sell the FJ rear for. The FJ stuff is very heavy for a Zuk (weight wise) and I think [img]images/graemlins/confused.gif[/img] that most of the FJ stuff has a c-clip rear axle [img]images/graemlins/cussing.gif[/img] A mini truck axle with 4.10's is a whole lot easier, cheaper, and IMHO, better in a Zuk.
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post #4 of (permalink) Old 04-20-2004, 12:10 PM Thread Starter
 
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Re: axle gearing...

You dont need to do a R&P install its merely putting a FJ40 differential into it. So I would much rather do that to keep the beefiness of the FJ60 and the passenger side offset diff ( I run the stock transfer case, just on steroids lol). Thanks Wayne that really cleared it up. Now does anyone know about the Firebird MC?
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post #5 of (permalink) Old 04-20-2004, 01:30 PM
 
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Re: axle gearing...

my late father-in-law bought a early 70's 4x4 ford pickup new and it had well over a 10% difference between front and rear diff gears. it did not work very well and sold it very quickly. as outlaw has stated keep the ratios fairly close such as 2% or closer
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