Do these numbers look normal?

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Maximus

JK Enthusiast
Joined
Mar 3, 2020
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186
Location
Wilmington, De
Driving on the highway....mph / rpm look normal for a stock Wrangler?

 
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I assume this is an auto? If so, it seems low to me. However, mine is a Rubicon with factory 4.10 gears and 315s.

If you have a lower gear ratio (3.73), that actually could be normal, yes.
 
According to my GPS at 60 MPH I was doing around 2040 RPM's, also a manual trans in 6th gear. Also have stock tires on with 3.21 gears.
 
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Here is mine in straight flat highway:
65 MPH = 1750 RPM
70 MPH = 2000 RPM
75 MPH = 2250 RPM
80 MPH = 2500 RPM

2 door auto trans. cruise control set.
 
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I am more familiar with TJs and so I am also learning the JK behavior. I have 35's so don't know if I am set at the right ratio but it don't bother me much about this.
 
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Chris said:
I believe those numbers are normal for a manual transmission on stock 3.73 gearing.
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Then why is there so much hype regarding regearing? Those were my numbers on the highway with my 37s. Are they talking about regearing to rock climb and off-road or could it be my gears have been changed already before I bought it...?
 
Maximus said:
Then why is there so much hype regarding regearing? Those were my numbers on the highway with my 37s. Are they talking about regearing to rock climb and off-road or could it be my gears have been changed already before I bought it...?
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At highway speeds (let's say 60-65 MPH), you should be around 2600 RPMs or so. Anything below that RPM will be lugging the engine.

From what I can see, you're lugging the engine since it's under 2K RPM.

No one says re-gearing is a requirement, but it will make your JK much more enjoyable to drive, I can promise you that.

Of course you'll never know what you've been missing until you try driving a JK that's been re-geared. It's then that you'll come back to us and say, "Wow, I can't believe how much better it is".
 
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Chris said:
At highway speeds (let's say 60-65 MPH), you should be around 2600 RPMs or so. Anything below that RPM will be lugging the engine.

From what I can see, you're lugging the engine since it's under 2K RPM.

No one says re-gearing is a requirement, but it will make your JK much more enjoyable to drive, I can promise you that.

Of course you'll never know what you've been missing until you try driving a JK that's been re-geared. It's then that you'll come back to us and say, "Wow, I can't believe how much better it is".
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Understood 👍🏼
 
When I had the 35's on my Jeep that came with it and with the 3.21 gears I couldn't even use 6 th gear because my RPM's were to low. One of the reasons I went to stock tires.
 
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