You mean that it peels out easily?
Hard time getting into third...Not real clear on what you mean. Difficulty in shifting or the 3.23 gear is so tall, the rpms at speed are too low to shift into 3rd?
I looked at the new Challengers drivetrain layout as a guide. Their Tremec 6 speed uses a 2.97 1st gear and a 3.90 axle. The Tremec 5 speed has similar ratios except for not having a 6th gear. I currently have 3.55 and was considering a switch to a set of 3.91 gears BUT I am also planning to replace my rear tires with some shorter and slightly wider tires. Shorter tires have the effect of installing deeper gears. The new tires are 7% shorter. I "added" 7% to the 3.55 gear and came up with an effective axle ratio of 3.79. To change both the tires and the diff gears, I'd have an effective gear ratio of 4.18. That seems a bit too much. I don't want a car that winds out too fast.
Again, back to what the factory is currently doing:
Tremec 6 speed:
2.97 1st gear, 3.90 axle equals a 11.58 first gear ratio.
Tremec 5 speed:
2.87 1st gear, 3.55 axle equals a 10.18 first gear ratio.
2.87 1st gear, 3.79 (Theoretical) equals a 10.87 first gear ratio.
2.87 1st gear, 3.91 axle equals a 11.22 first gear ratio.
2.87 1st gear, 4.18 (Theoretical) equals a 11.99 first gear ratio.
The 5.7L and 6.4L Hemi engines are different animals than a 440 or even a stroked 440 but my thoughts are that a big block does not need to wind as much to make the power, the engine makes more torque down low too.
the numbers with the 3.23:
2.87 X 3.23 = 9.27 1st gear ratio. The 3.23 would result in a super tall 2.06 final drive in the .64 OD. If you have a rowdy cam, it may not like idling at 1500 at 70 mph. Time will tell. A stock engine with a mild cam would love it but anything with lots of overlap may not.
