Clyde,
You are correct, the Jeep trans ratio in 4th is still 1 to 1. However, we
need to consider the third factor in the drivetrain ratios. That being the
tire circumference. The fact is one should consider RPM per tire rotation so
the WHOLE driveline system is factored in. That way you are looking at the
true final output.
As I said you get an "equivalent" overdrive IF you used taller tires.
And with the Jeep trans you could do that because a taller tire would bring
the 3.01 1st gear on the Jeep trans near the 2.78 1st gear of a wide ratio
Toploader.
The inverse is also true. One could run a shorter tire with an overdrive
T-5 and effectively wipe out the advantage of the overdrive. Of course this
taller/shorter tire argument needs to be based around a standard. In my
number crunching I use the standard size tire that originally came on the
Tiger.
I always found it humorous when friends would say they were going to run
4:11 gears in their muscle car - with 50 series tires. Why? Well, isn't
that what the drag cars run (they would say)? I guess they never considered
how tall a race slick the drag car ran.
Tom
> Hi Gang, I must be missing something here!! Where is the OD?? The
> numbers.
> ratios, stated still end up 1 to 1 in 4th..Clyde
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