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Old 10-04-2008, 10:44 PM   #1
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Question Performance difference???

So I have another question for you's. Is there is a difference in performance between a 1997 TJ and a 2001 TJ?? My buddy just bought a 2001 Wrangler Sport yesterday - 6cyl 5 speed. We took it for a test drive and it seems as if it has more giddy up than mine. The only difference I could see right off is that his Jeep has the muffler cut off and has a straight pipe in place. Would that make a difference in performance against mine with the big ole factory muffler??

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Old 10-04-2008, 10:49 PM   #2
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What gear ration do you have and what gear ration does he have? Gears will make a big difference.

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Old 10-04-2008, 11:04 PM   #3
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Good question?? I cant read the gears on either one of the metal tags on the diff cover of our Jeeps??
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Old 10-04-2008, 11:12 PM   #4
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Try spraying some brake cleaner on the tags and wiping them off real good.
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Old 10-04-2008, 11:26 PM   #5
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Well, you have 33's... is his stock? That would be the biggest difference.
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Old 10-05-2008, 08:44 AM   #6
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I have 33's, he has 31's but I was doing a comparison from when mine was stock - about a week ago.....

I tried the whole cleaning the tags on the diff., mine is too rusty and cant read his either.....
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Old 10-05-2008, 08:49 AM   #7
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There were some changes to the intake and computer that might account for a minimal difference. I doubt you could feel it.
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Old 10-05-2008, 10:09 AM   #8
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If your have 3.07 gears with 33s and his has say 3.73 and 31s it is going to be a noticeable difference between the two.I have 3.07 with 33s and it is doggy compared to a friend of mine with 3.73 and 31s.The first time I worked on his and took it for a test drive afterward I could feel more power from his right off the bat.
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Old 10-05-2008, 10:22 AM   #9
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The 97 sports had 3.55 gear ratio's. They switched it to 3.73's in 98 I believe.
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Old 10-05-2008, 10:43 AM   #10
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What about the mileage difference. Your engine is 4 years older then his. Some engines tend to lose that inital giddy after a little while.
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Old 10-05-2008, 02:50 PM   #11
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The 97 sports had 3.55 gear ratio's. They switched it to 3.73's in 98 I believe.
Maybe on the late 97s but mine is a 97 Sport and has 3.07s I am not sure what the build month is but it for sure has 3.07.I would like to lower mine to 4.10 or maybe even 4.56 eventually.
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Old 10-05-2008, 07:41 PM   #12
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I'm sorry I should have been clearer. From what I believe the manual 97's had 3.55's that switched to 3.73's in 98's with the manual.

I believe that the automatic wranglers had the 3.07s. I could be mistaken though.

SLF-Do you have a manual or auto?
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Old 10-05-2008, 07:56 PM   #13
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You could be right on that! I have an automatic.Although the automatic should have being the first to be geared lower and frankly they should have never put 3.07 gears in either one but I guess even the smartest people in the world have a brain fart from time to time!!!
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Old 10-05-2008, 09:41 PM   #14
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Quote:
Originally Posted by Sb5551 View Post
The 97 sports had 3.55 gear ratio's. They switched it to 3.73's in 98 I believe.
Quote:
Originally Posted by Sb5551 View Post
I'm sorry I should have been clearer. From what I believe the manual 97's had 3.55's that switched to 3.73's in 98's with the manual.

I believe that the automatic wranglers had the 3.07s. I could be mistaken though.
Stick or not, 3.55's only came with 4.0 powered TJ's with optional D44, later switching them to 3.73's.
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Old 10-06-2008, 11:49 AM   #15
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Stick or not, 3.55's only came with 4.0 powered TJ's with optional D44, later switching them to 3.73's.
See, I was mistaken. What gear ratio did the D35 have?
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Old 10-06-2008, 10:03 PM   #16
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3.07's, 3.73's, a rare 3.55 ratio and 4.10's where available from the factory for a TJ D35

Since you have a 4.0, that most likely eliminates the 4.10's that came with the 4cyl, but was still option with the 4.0L if orders from the dealer with them. The 3.55's are just down right not that common.

So most likely you have 3.07's or 3.73's.

Another way to tell is to lift the rear end off the ground and mark the drive shaft or yoke. Spin the rear tire "1" complete rotation and count the time the drive shaft makes a rotation.

If it's basically 3 times....3.07's ....3 and 3/4 rotations and it's 3.73's, and so on.

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