with CAI and aftermarket muffler I shift between 3000 and 3500. My neighbor has same set up with flashpaq and he shifts between 3400 and 4000.

 

My shifts are totally dependent on conditions. I live in a rather hilly area, drive backroads and highways, and have the need to merge with rush hour traffic... often.

I also have 4.10's and am on stock Rubicon 32's. That makes a big difference as to how much room I have to play with using different shift points. In a jeep geared too tall, you're in search of staying in an RPM range where the jeep makes power.

With that said, I've found that my JK has a few notable points in it's powerband...

Under 1,100 rpm, and the motor falls on it's face. Its no mans land.

1,100 - 1,400 is good for flat ground around-town or backroad cruising.

Right around 1,400 is where the motor wakes up a little. I need to be at or above that RPM if I intend to use that gear to merge with highway traffic. If I'm under 1,400, I'm likely not going to get up to speed safely in that gear and will need to grab the next lower.

The motor wakes up some more at 2,100 rpm. You can hear the motor start to sound 'gruff'. That's good engineering on the engine designers part. You know the intake manifold, heads, and cam are matched well. 2100 RPM is a good RPM to make note of for when power is needed. Hills, passing, towing, etc.

Anyone recall where our motors make the most torque and horsepower? I thought I recall torque peaking at about 4,000, and HP up around 4,800. Is that right?

 

exactly!!!!

 

Yep. I don't recommend it. But if you drive a Caravan with the same motor, it's stock shift points are around 3500 to 4000. If you floor it, it will go higher.

My girl's JK with the auto will shift at around 3,800 if using moderate throttle.

 

Don't shift out of first intll about 4k or 5k. Then 2nd, 3rd, 4th, 5th is about 2500 to 3000. I'm get about 17 to 18 with 35 and 3.21.

 

Depending on conditions 2200 to 3500 rpm, but if I'm playing from red light to red light it will see 5000 and bark the 35's when I shift to second.

 

I will sometimes drop it to 3rd at highway speeds if I need some nuts to pass going up hill....I will see 4800-5000RPM 100-110km/hr. It just spits out the built up carbon from my wife driving it around town like a grandma. Normally I shift at 2500-3500 RPM depending on conditions.

 

Agreed, it works in an emergency, and that was the point I was getting across. It can be done, but its not recommended.

As far as the semi drivers not using a clutch, again, i have yet to see an owner operator match RPMs in lieu of using a clutch(on a regular basis). Seing as the transmission is un-sync'd, you have to match rpms when you clutch out anyways. Not to do so is lazy, and wears on your transmission.

The clutch is there for a purpose. Use it. Replacing a clutch is more affordable than a transmission.