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Old 04-20-2008, 07:53 PM   #1
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Question How can I tell what gears I have?

I have a stock TJ sport with the Dana 35 rear. How can I figure out whether I have 3.07 or 3.73 gears or something else? I've read that there are two different cases (low or high) for the 30 and 35, and this limits what gears can be used in that case.

Thanks.

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Old 04-20-2008, 08:01 PM   #2
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Check the rear diff for a metal army looking tag. It should say on there. Its usually on the left side of the diff mounted on the bolts that hold the cover.

If its a manual sport there is a very good chance of you having the 3.73

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Old 04-20-2008, 08:08 PM   #3
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Put your transfer case in neutral, jack up the rear, and spin a tire. Count how many times the driveshaft makes a rotation for each tire rotation.

If you sping the tire one rotation and the driveshaft turns almost 4 complete times, you have 3.73's.
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Old 04-20-2008, 08:28 PM   #4
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Old 04-20-2008, 08:38 PM   #5
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my 97 4.0 5 speed sport has 3.07
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Old 04-20-2008, 08:44 PM   #6
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you're one of the unlucky ones. most 5 speed sports have 3.73
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Old 04-20-2008, 08:44 PM   #7
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my old 1999 5spd sport also had 3.07 gears.
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Old 04-20-2008, 08:49 PM   #8
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Maybe it was the 96 sport with a 5 speed had 3:73's.
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Old 04-20-2008, 09:07 PM   #9
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my 00 has the 3.73

and nico you're on the other end of the world where everything is upside down.
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Old 04-20-2008, 09:14 PM   #10
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Quote:
Originally Posted by Vector6 View Post

I found it easier to read the numbers when the tag is wet with wd40 or something. Clean it as best as you can and then spray it to see the numbers.
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Old 04-20-2008, 09:28 PM   #11
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3.73's were only optional on late model '97 TJ with D44's... and optional with 98 TJ's... it an equal possibility one way or the other for him.
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Old 04-20-2008, 09:30 PM   #12
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ya mine is made like 09-96.. so stuck with the dumb 3.07s
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Old 04-21-2008, 09:46 AM   #13
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D35, 5 speed with 3.73's but a 44 with 3.73's would have been lots better.
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Old 04-21-2008, 08:01 PM   #14
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i'd take a d44 with 3.07 gears any day vs my d35 with 3.73s lol

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