Adam wrote:
>This transmission with an Ashcroft converted transfer case
>or overdrive, and 4.10:1 gears in the axles would give approximately 95 mph
>at 3000 rpm, with 33" tires.
>
You would actually be looking at close to 3500 rpm at 95
mph. At a more modest 70 mph you would be looking at
about 2600 rpm. This could work as long as the terrain
were not too hilly. Depends on what kind of power that
4cyl was putting out. Keeping the 4.7 diff gears would
put you at around 3000 rpm at 70 mph. That could work
also. It depends on where you want that rpm sweet spot
for cruising.
I assume you arrive at your 85 to 1 lowest crawl ratio by
using the Series II low 2.88 tcase gear? Otherwise you
are looking at a 68 to 1 lowest crawl ratio with the
standard Series IIA tcase gears.
If you want to easily play around with various gear
combos go to my web page URL below. It will produce rpm
spreadsheet tables for any combos and already has the
SM420 and SM465 transmissions hard coded. For the
transfer case choose a Series model and remember to
change the high ratio to .87 - that approximates the
Ashcroft high ratio gearing.
www16.brinkster.com/indio2/rpmtablecalc.html
Tim Czajka
1972 Series III 88
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This archive was generated by hypermail 2b30 : Mon Jun 11 2001 - 13:17:45 EDT