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Unread 02-23-2008, 02:09 PM   #1
bigdog79
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gearing question

just bought a 98 tj 5 speed and need to find out the stock gearing any suggestions where to find out?

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Unread 02-23-2008, 04:30 PM   #2
Rocky529
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Rear differential cover there will be a tag... 9 o'clock position.
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Unread 02-23-2008, 04:32 PM   #3
htownjeep
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If the tag is gone get a build sheet from Jeep.
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Unread 02-23-2008, 04:33 PM   #4
McLovin
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if it's a manual stock gears will be 4.10's. Auto it will be 3.73's.
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Unread 02-23-2008, 04:35 PM   #5
htownjeep
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Quote:
Originally Posted by Shawn_c View Post
if it's a manual stock gears will be 4.10's. Auto it will be 3.73's.
This is false. These are possibilities, but not the only ones.
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Unread 02-23-2008, 06:16 PM   #6
McLovin
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Quote:
Originally Posted by htownjeep View Post
This is false. These are possibilities, but not the only ones.
No it's not, the 2.5L left the factory with only those gearing options. Sure someone could have swapped axles, but thats highly unlikely.
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Unread 02-23-2008, 06:37 PM   #7
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And to fill out the rest of your profile
trans = AX5
TC = NP231
FA = D30
RA = D35
Gears = 4.10
unless some messed with the stock stuff which isn't likely.
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Unread 02-23-2008, 06:37 PM   #8
htownjeep
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Quote:
Originally Posted by Shawn_c View Post
No it's not, the 2.5L left the factory with only those gearing options. Sure someone could have swapped axles, but thats highly unlikely.
Where does it say it was a 2.5L? His question just says it was a 98 TJ 5speed.
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Unread 02-23-2008, 06:38 PM   #9
Waldn
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In his profile
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Unread 02-23-2008, 06:44 PM   #10
McLovin
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Quote:
Originally Posted by htownjeep View Post
Where does it say it was a 2.5L? His question just says it was a 98 TJ 5speed.

Thats why I read his profile
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Unread 02-23-2008, 06:49 PM   #11
bigdog79
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thankyou for taking the time to answer my question i have only been a member of JF for 2 days and i have already figured out that the jeep community has no problem sharing the advice and expierence that you all have to help a newcomer you guys aare great
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Unread 02-23-2008, 06:53 PM   #12
htownjeep
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Quote:
Originally Posted by Waldn View Post
In his profile
Gotcha...didn't read profile obviously.
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Unread 02-23-2008, 07:19 PM   #13
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Taken from this thread: http://www.jeepforum.com/forum/showt...threadid=23792

The easiest way to determine your gear ratio is to check the tag that's bolted to the front differential cover. On the tag you should see some numbering such as 3.54 or 3.73, either of those numbers would indicate the stock axle ratio. To verify this (your gears could've been changed,. wrong tag, etc.), jack up the rear axle and support it with jack stands. With the transmission in neutral, rotate the rear driveshaft by hand. Count the number of driveshaft revolutions required for one revolution of the tire.
If the driveshaft turns approximately 3-1/2 times, you have a 3.54 ratio, etc. It's helpful to use a grease pencil or chalk to make a reference point on both the tire and driveshaft. For increased accuracy it is recommended to rotate the wheels two times and divide the result by two.
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