engine power
11-17-2009, 01:52 PM
#22
JK Enthusiast
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i have a 2008 4 door jk. first jeep for me. it seems at highway speeds, and the slighest incline, my jeep is down shifting to make the climb. seems like i always have to have my foot into the pedal to make it go. had a 4 cylinder honda element that cruised much better. please dont tell me its a jeep thing again. tired of hearing excuses
http://home.comcast.net/~kingslea1/Jeep/Gearing.pdf
11-17-2009, 07:23 PM
#24
Take a look at this. It is not a Jeep thing. It's an economy thing.
http://home.comcast.net/~kingslea1/Jeep/Gearing.pdf
http://home.comcast.net/~kingslea1/Jeep/Gearing.pdf
This is the chart that's JK specific for both the auto and manual trans with the correct OD ratios figured in for each.
11-18-2009, 02:43 AM
#25
JK Jedi Master
RedneckJeep,
The pdf redrunner linked to is JK specific, too.
I don't agree with the subjective interpretation of the gear ratios (color codes) in your chart. I would hate to think a 4.10 ratio on 32" tires, automatic, is good for only "mild trail use at low elevation".
I can prevent my JK from being sluggish (as noted in your chart) by proper use of the two levers on the console and the O/D button.
The pdf redrunner linked to is JK specific, too.
I don't agree with the subjective interpretation of the gear ratios (color codes) in your chart. I would hate to think a 4.10 ratio on 32" tires, automatic, is good for only "mild trail use at low elevation".
I can prevent my JK from being sluggish (as noted in your chart) by proper use of the two levers on the console and the O/D button.
Last edited by ronjenx; 11-18-2009 at 02:46 AM.
11-18-2009, 05:53 AM
#26
RedneckJeep,
The pdf redrunner linked to is JK specific, too.
I don't agree with the subjective interpretation of the gear ratios (color codes) in your chart. I would hate to think a 4.10 ratio on 32" tires, automatic, is good for only "mild trail use at low elevation".
I can prevent my JK from being sluggish (as noted in your chart) by proper use of the two levers on the console and the O/D button.
The pdf redrunner linked to is JK specific, too.
I don't agree with the subjective interpretation of the gear ratios (color codes) in your chart. I would hate to think a 4.10 ratio on 32" tires, automatic, is good for only "mild trail use at low elevation".
I can prevent my JK from being sluggish (as noted in your chart) by proper use of the two levers on the console and the O/D button.
You said it yourself you have to use the buttons, therefore making it not an ideal combination.
Just my subjective interpretation.
11-18-2009, 12:50 PM
#27
JK Jedi Master
It does not take into account the transfer case ratio as for 4low operation. It is sluggish because you have to use those two levers and the o/d button to drive "normally". Which is why if you had the next step, 4.56 you wouldn't have to use those nearly as often since you would be able to maintain your speeds longer/higher grades before downshifting or hitting the o/d button.
You said it yourself you have to use the buttons, therefore making it not an ideal combination.
Just my subjective interpretation.
You said it yourself you have to use the buttons, therefore making it not an ideal combination.
Just my subjective interpretation.
I know the chart doesn't consider 4lo. So, to make it better than "mild trail use at low elevation", I get into 4lo. That's why it's there.
11-18-2009, 02:56 PM
#28
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The chart is right for 65 MPG and 1:1 ratio. Now it does take 32" diameter literally. Where in reality most "32" tire's effective diameter is less as measured from the ground to the axle center. I copied the chart from another source but agrees with my excel calculations. Tell me please via a calculation of a few of the figures why it is wrong.
Last edited by redrunner; 11-18-2009 at 02:59 PM.
11-18-2009, 04:23 PM
#29
RedneckJeep,
The pdf redrunner linked to is JK specific, too.
I don't agree with the subjective interpretation of the gear ratios (color codes) in your chart. I would hate to think a 4.10 ratio on 32" tires, automatic, is good for only "mild trail use at low elevation".
I can prevent my JK from being sluggish (as noted in your chart) by proper use of the two levers on the console and the O/D button.
The pdf redrunner linked to is JK specific, too.
I don't agree with the subjective interpretation of the gear ratios (color codes) in your chart. I would hate to think a 4.10 ratio on 32" tires, automatic, is good for only "mild trail use at low elevation".
I can prevent my JK from being sluggish (as noted in your chart) by proper use of the two levers on the console and the O/D button.
11-18-2009, 04:29 PM
#30
The chart is right for 65 MPG and 1:1 ratio. Now it does take 32" diameter literally. Where in reality most "32" tire's effective diameter is less as measured from the ground to the axle center. I copied the chart from another source but agrees with my excel calculations. Tell me please via a calculation of a few of the figures why it is wrong.