Preliminary 2012 Pentastar Gear Chart (beta)
11-20-2011, 06:11 AM
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JK Junkie
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Preliminary 2012 Pentastar Gear Chart (beta)
Here's an updated gear chart for the new transmissions and Pentastar. It's probably not perfect, but most things measured by gut an feel aren't. There is definitely some math involved, a collection of dyno charts and knowledge of how things change with bigger meats. By no means is it perfect and I'll wait for some feedback before I push any further ahead.
Based on 70mph and the same criteria as the chart I did for the FAQ.
Based on 70mph and the same criteria as the chart I did for the FAQ.
Last edited by JPop; 11-20-2011 at 06:46 AM.
11-20-2011, 06:54 AM
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JK Junkie
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Extremely busy with work stuff, so I don't have as much time to spend on this as I'd like. When complete and after some editing based on some feedback it will look the same as the charts currently in the FAQ I did a few years ago.
As an aside, I am stoked about the new automatic transmission. In my opinion it has seriously cramped some of the advantages I see in a manual transmission. Moving the OD ratio the wrong way on the manual eats up half the slip when the converter isn't locked up on the automatic.
11-20-2011, 07:11 AM
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That seems very accurate I have 34s with the 3.21 gears and the 5 speed auto. Cruising at 65 mph I am about 1700-1800 rpm and got on average 20 mpg. I may change the gears when I throw lockers in. Im debating 3.73 and 4.10.
11-20-2011, 07:36 AM
#7
JK Freak
Sorry I missed that. 70mph and aligned with the old chart data in the FAQ.
Extremely busy with work stuff, so I don't have as much time to spend on this as I'd like. When complete and after some editing based on some feedback it will look the same as the charts currently in the FAQ I did a few years ago.
As an aside, I am stoked about the new automatic transmission. In my opinion it has seriously cramped some of the advantages I see in a manual transmission. Moving the OD ratio the wrong way on the manual eats up half the slip when the converter isn't locked up on the automatic.
Extremely busy with work stuff, so I don't have as much time to spend on this as I'd like. When complete and after some editing based on some feedback it will look the same as the charts currently in the FAQ I did a few years ago.
As an aside, I am stoked about the new automatic transmission. In my opinion it has seriously cramped some of the advantages I see in a manual transmission. Moving the OD ratio the wrong way on the manual eats up half the slip when the converter isn't locked up on the automatic.
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11-20-2011, 10:15 AM
#8
As an aside, I am stoked about the new automatic transmission. In my opinion it has seriously cramped some of the advantages I see in a manual transmission. Moving the OD ratio the wrong way on the manual eats up half the slip when the converter isn't locked up on the automatic.
Care to elaborate in simpler terms please ?
