I don't know what gearbox numbers were in Midgets, but you very well
could have a different speedo gear. '75-77 Midgets had a 3.9 diff ratio,
and '78-'79 Midgets had a 3.7 diff. What ratio do you have in your Spit?
-=Chris
Chris King
http://home.comcast.net/~kvcbk/
<-----Original Message----->
From: Gary Hutton
Sent: 4/30/2004 5:42:36 PM
To: spitfires@autox.team.net
Subject: Re: speedometer drive pinion
I just installed my backup transmission in my 76 1500 and noticed that
my
speedometer readings are off - it now shows 50mph at about 3700 rpms
where
50mph used to be at about 3000 rpms with my old transmission. I'm
wondering
if the new one came from a post-75 Midget and if the speedo drive pinion
and
/or drive gear might be different. The serial number on the new one
starts
with a "C" - no "F" in sight. Anybody dealt with this? Did the Midgets
use
different size tires maybe? And finally, can you swap out the drive
pinion
without taking the rear housing apart?
TIA,
Gary Hutton
Newburgh, IN
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