The way I do it is to jack up one rear wheel, and make a mark on this and
the driveshaft. Every rotation of the wheel should produce half the diff
ratio rotations of the driveshaft, eg for a 4.22 diff, turning the wheel
once should rotate the driveshaft 2.1 times. It's easy enough to tell cause
with the 4.2 diff the drive shaft goes just over 2 rotations, and with the
3.89, the drifeshaft doesn't quite complete the second. To be more accurate
you can turn the wheel 10 times, and for the 4.22 the driveshaft should
rotate 21 times, while only 19.5 times for the 3.89
Greg
----- Original Message -----
From: Steve Shuttleton <packit(at)erols.com>
To: <alpines(at)autox.team.net>
Sent: Wednesday, 16 February 2000 05:44
Subject: rear end ratios
> I have a series IV Alpine that I converted from wire wheels to bolt ons.
> When I did this, I used a rear from a series v Alpine.
> I no longer have the series V car or any serial #s from that car. Is there
a
> way to tell what ratio the rear has? I know that there
> are numbers on the rear itself. What numbers correlate to the 3:89 ratio,
or
> is there a better way to tell what the ratio is.
> By the way, if there is anyone out there that has an overdrive trans that
> they'd like to part with, please let me know.
>
> Thanks,
> Steve Shuttleton
>
>
This archive was generated by hypermail 2b30 : Tue Sep 05 2000 - 08:49:50 CDT