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Unread 11-09-2007, 08:37 AM   #1
lilngineer
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Differential Gear Ratio ID

Hi,

Dumb question, but how can I identify my differential gear ratios on my 99TJ 2.5L?

Thanks,

Jason

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Unread 11-09-2007, 08:47 AM   #2
frankiefire702
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If it's a 5sp they would be 4:10's.
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Unread 11-09-2007, 09:05 AM   #3
Cooneys08JK
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Get under your jeep and look at the differential housing on the top left corner there should be a tag and the gear ratio is stated on it....if i remember correctly the ratio is the first 3 numbers on the tag....if the tag isnt on the rear dif check the front..
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Unread 11-09-2007, 10:20 AM   #4
Wheelin98TJ
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5 speed = 4.10

Auto = 3.73
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Unread 11-09-2007, 01:52 PM   #5
lilngineer
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It is a 5-speed. So which axles they?
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Unread 11-09-2007, 02:01 PM   #6
Cooneys08JK
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refer to this: http://www.offroaders.com/info/tech-.../axlefacts.htm

another easy way to find out is look at your rear dif if it has a metal screw fill plug its a dana 44 if it is a plastic fill plug it is a dana 35....your front axle is definatly a dana 30...but while your under your jeep you can read the tag on the rear dif and find out what gears you have....kill two birds with one stone...
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Unread 11-09-2007, 02:04 PM   #7
Jerry Bransford
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Quote:
Originally Posted by lilngineer
It is a 5-speed. So which axles they?
Front is a Dana 30, rear is a Dana 35c.
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Unread 11-09-2007, 02:55 PM   #8
Wheelin98TJ
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For future reference, the "Stock TJ Specs" sticky thread has the answers to your questions.
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