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ajtudor 04-20-2008 08:53 PM

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.


Triple88a 04-20-2008 09:01 PM

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

AzTJ 04-20-2008 09:08 PM

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.

Vector6 04-20-2008 09:28 PM

look here... on either axle

black71gp 04-20-2008 09:38 PM

my 97 4.0 5 speed sport has 3.07

Triple88a 04-20-2008 09:44 PM

you're one of the unlucky ones. most 5 speed sports have 3.73

nicolas-eric 04-20-2008 09:44 PM

32 Attachment(s)
my old 1999 5spd sport also had 3.07 gears.

4point 04-20-2008 09:49 PM

Maybe it was the 96 sport with a 5 speed had 3:73's. :D:rolleyes:

Triple88a 04-20-2008 10:07 PM

my 00 has the 3.73

and nico you're on the other end of the world where everything is upside down.

Triple88a 04-20-2008 10:14 PM


Originally Posted by Vector6 (Post 220436)

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.

AzTJ 04-20-2008 10:28 PM

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.

black71gp 04-20-2008 10:30 PM

ya mine is made like 09-96.. so stuck with the dumb 3.07s:(

KicknJeep 04-21-2008 10:46 AM

D35, 5 speed with 3.73's but a 44 with 3.73's would have been lots better.

Triple88a 04-21-2008 09:01 PM

i'd take a d44 with 3.07 gears any day vs my d35 with 3.73s lol

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