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Old 08-27-2010, 01:59 PM   #1
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I need to know which gears i have in my jeep

I bought a jeep from a fella who, in a pinch, let his cousin throw a cherokee ring and pinion into his rearend when it broke. However, he does not know what gears were put in it. Ergo, I need to know what gears my jeep is supposed to have. Can i tell from the VIN or am i forced to guess or even rip out and compare? I also don't have the tag on the dif that tell you. Any help would be greatly appreciated. I have a 97 Jeep wrangler, 4 cyl. 5 speed. Thank you

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Old 08-27-2010, 02:01 PM   #2
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Hmmm ill look around a bit. I've got a 4cyl 2.5 litre as well.

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Old 08-27-2010, 02:02 PM   #3
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More than even chance you have 4.11
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Old 08-27-2010, 02:07 PM   #4
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Five-speed manual Three-speed automatic
Overdrive,
synchronized in all forward gears Electro-hydraulic control,
electronically controlled converter clutch
First 3.93 (a); 3.83 (b) 2.74
Second 2.33 (a); 2.33 (b) 1.54
Third 1.45 (a); 1.44 (b) 1.00
Fourth 1.00
Fifth 0.85 (a); 0.79 (b)
Axle 4.11 (a); 3.07 std., 3.55 opt. (b)
Overall top gear ratio 3.49 (a);
2.24 w/3.07 AR, 2.55 w/3.55 AR (b) 3.73 (a); 3.07 std., 3.55 opt. (b)

Notes (a). With 2.5 L engine; (b) With 4.0 L engine
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Old 08-27-2010, 02:09 PM   #5
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Mark it, spin it and count the rotations....
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Old 08-27-2010, 02:10 PM   #6
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Mark it, spin it and count the rotations....
yes one tire spin and see how many tires drive shaft spoins
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Old 08-27-2010, 02:24 PM   #7
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It came with 4.11 many Cherokee's have a 4.11 unless he changed both diffs it's 4.11
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Old 08-27-2010, 02:28 PM   #8
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Ummmm, look on the front axle tag....I'd bet a donut its a 4.09, so the rear would be 4.10
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Old 09-03-2010, 12:21 PM   #9
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On a related topic, my wipers do not work. Is there a fuse or a relay that runs them, or a switch rather that would cause an issue, i replaced my indicator switch, and i believe the fuses are all good. Is there something else that could cause a problem? Or is the motor just bad? Also, do jeeps have ground straps for the radio?
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Old 09-03-2010, 12:25 PM   #10
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There should be a relay for the wipers although I dunno where it would be....90 percent of chryslers in general use a strap instead of a wire to ground the radio
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Old 09-03-2010, 12:34 PM   #11
Knows a couple things...

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Counting the driveshaft rotations to determine the axle ratio takes two revolutions of the tire with an open axle. Only with a locker or clutch-based LSD installed will one tire revolution rotate the driveshaft the number of times equal to the axle ratio. Jack up the rear end, shift the transfer case to neutral, and rotate one of your rear tires accordingly. And if the other tire rotates in the opposite direction, your axle is "open" so the wheel will require two revolutions so the driveshaft rotates a number of times equal to the axle ratio.

I'll take that donut bet, you won't find a 4.09 ratio anywhere in a Dana axle. 4.10/4.11 yes.
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Old 09-03-2010, 12:45 PM   #12
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Originally Posted by Jerry Bransford View Post
Counting the driveshaft rotations to determine the axle ratio takes two revolutions of the tire with an open axle. Only with a locker or clutch-based LSD installed will one tire revolution rotate the driveshaft the number of times equal to the axle ratio. Jack up the rear end, shift the transfer case to neutral, and rotate one of your rear tires accordingly. And if the other tire rotates in the opposite direction, your axle is "open" so the wheel will require two revolutions so the driveshaft rotates a number of times equal to the axle ratio.

I'll take that donut bet, you won't find a 4.09 ratio anywhere in a Dana axle. 4.10/4.11 yes.
Before I say you owe me....when you say Dana axle, are you meaning just Dana's used in Jeeps or Dana's in general?
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Old 09-03-2010, 12:50 PM   #13
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This is a Jeep Wrangler forum, you can safely assume I am talking about Dana axles used in Jeep Wranglers.

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