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Old 09-13-2013, 12:59 PM   #1
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Gear ratio on my 93 yj- HELP

No tags on the diffs, If i did the calculation correct I am looking at a 3.84 gear ratio on my YJ using the following calc.

RPM x TIRE DIAMETER
__________________= GEAR RATIO

60 X 336

WHICH MINE IS 2500X 31
________=
60X336

77500
______= 3.84
20160

DOES THIS LOOK CORRECT?
I am still going to manually rotate the tires but I need help.

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Old 09-13-2013, 01:25 PM   #2
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Manual or automatic? Stock or modified? 4.0 or 2.5?

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'93 YJ / 3.5" lift (2.5" Old Man Emu suspension and 1 inch shackle) / 31 X 10.50 BFG's / 2.5 power / 5 speed / Quadratec winch..........KCCO!!!
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Old 09-13-2013, 01:58 PM   #3
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'93 with a 2.5 has 4.10's
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Old 09-13-2013, 02:49 PM   #4
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Charley24, manual 2.5 not sure if it was modified, bought it from a guy with no real history. I would assume someone modified it through the years. looks like you have a similar rig. tires are 15x10.5.31, no lift, not sure but i think it was a hardtop with half doors that was changed to a soft top.
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Old 09-14-2013, 08:13 PM   #5
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Cowboy 17 is correct. '93 2.5 5 speed has 4:10 gears. That's what mine has.
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'93 YJ / 3.5" lift (2.5" Old Man Emu suspension and 1 inch shackle) / 31 X 10.50 BFG's / 2.5 power / 5 speed / Quadratec winch..........KCCO!!!
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Old 09-15-2013, 01:20 PM   #6
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if it has no lift or big tires then its probably the stock 4.10

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