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5:12's Too Low?

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Offline one mile

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5:12's Too Low?
« on: October 12, 2010, 08:28:54 PM »
On a stock Samurai with 30"tall tires steet driven 90% of the time are 5:12's O.K.?
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Offline my996duc1

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Re: 5:12's Too Low?
« Reply #1 on: October 12, 2010, 09:03:00 PM »
it should work but if you can go t-case and ring & pinion gears you will get a better combo.

My '87 had 5.12 gears and stock t-case with 31" tires for awhile.
I was turning 4200rpm at 65mph with a low range crawl ratio of 42:1
This had my speedo off by about 10mph and the odo was off too.

Now I am running 4.30 gears and a 6.4 t-case with 31" tires.
I am turning 4100rpm at 65mph with a low range crawl ratio of 100:1
Speedo / Odo are almost spot on.

Here is a good calculator for figuring speed/rpm/crawl ratio/ ect....
Keep in mind that your tires may not be the size advertised on the sidewall.
http://www.grimmjeeper.com/gears.html

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1987 Tintop / 1.6 16V ps & ac / 6.4 t-case Twisted TT / 4.30 R&P Hybrid rear / Double Tough axles / Shrockworks all around / ARB f&r / Mighty Kong & TT full skid / DS disconnect / CV shafts f & r / YJ missing links f & r / Petroworks tintop cage / 15 gal Tank / 31" x 12.50 Pro Comps
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Offline wildgoody

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Re: 5:12's Too Low?
« Reply #2 on: October 13, 2010, 08:28:09 AM »
That's a great calculator, gives you 2 screens to play with #s and look at results side by side
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