3.21 vs 3.55
Ram has built a number of 1500s, 5.7 hemi's with the new 8spd trans. Some or most of them have the 3.21 gears. The tow rating is about 2,000lbs less than the same truck with 3.55s regardless if the tr...
Forum Discussion
With today's close ratio automatics, the diff can now be a MPG ratio
Close ratio to allow the ICE to spin within it's most optimal range and
also has double over drive
What really matters is the 'effective' ratio at the tire contact patch to pavement
So your posted tranny gear ratio's is out of context without the diff ratio
and the simple math is to factor both the 3.21 and 3.55 to see them side by side
My dream manual tranny is a NV4500 and here are it's ratios and might even
change my 4.1's to something in the 3's...along with an inline over drive
1st 6.34 1993 or 5.61 after 1993
2nd 3.44
3rd 1.71
4th 1.00
5th 0.73
reverse 6.34 (1993) 5.61 (1994 on)
Close ratio to allow the ICE to spin within it's most optimal range and
also has double over drive
What really matters is the 'effective' ratio at the tire contact patch to pavement
So your posted tranny gear ratio's is out of context without the diff ratio
and the simple math is to factor both the 3.21 and 3.55 to see them side by side
My dream manual tranny is a NV4500 and here are it's ratios and might even
change my 4.1's to something in the 3's...along with an inline over drive
1st 6.34 1993 or 5.61 after 1993
2nd 3.44
3rd 1.71
4th 1.00
5th 0.73
reverse 6.34 (1993) 5.61 (1994 on)
