<div dir="ltr">What we call the differential includes the ring and pinion. The assembly, or pumpkin, is what he needs. <br></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, May 10, 2015 at 10:03 AM, <span dir="ltr"><<a href="mailto:WeslakeMonza1330@aol.com" target="_blank">WeslakeMonza1330@aol.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
<div style="FONT-SIZE:10pt;FONT-FAMILY:Arial;COLOR:#000000"><font color="#000000" face="Arial" size="2">
<div>Not exactly!</div>
<div> </div>
<div>The differential doesn't change the gearing of the rear axle. The
gearing of the rear axle is down to the ring and pinion or what we call over in
the UK, the crownwheel and pinion.</div>
<div> </div>
<div>You want the ring and pinion fitted to the differential component and all
fitted together in the differential as a single large component - what I believe
you call the pumpkin. Probably your best bet is to simply buy a good 3.9
from Alan Fisher who is having a clear out.</div>
<div> </div>
<div>Changing the axle ratio doesn't improve the performance of the car it
simply changes the gearing. To reduce the engine rpm for any given speed in 4th
gear you need to replace the 4.22 diff with the 3.9 diff or fit a 5 speed
gearbox with either.</div>
<div> </div>
<div>If your car is struggling to maintain 70 mph you need to understand if this
is because the engine is really revving out (might have a diff lower than a 4.2
like a 4.5 or lower from a Morris Minor or whatever) or if the engine is simply
not running well enough to get up the required revs.</div>
<div> </div>
<div>Regards</div>
<div> </div>
<div>Daniel</div>
<div> </div>
<div>PS: there are books with this stuff in...</div>
<div> </div>
<div><span class="">
<div>In a message dated 10/05/2015 15:51:41 GMT Daylight Time,
<a href="mailto:spridgets@autox.team.net" target="_blank">spridgets@autox.team.net</a> writes:</div>
</span><blockquote style="PADDING-LEFT:5px;MARGIN-LEFT:5px;BORDER-LEFT:blue 2px solid"><font style="BACKGROUND-COLOR:transparent" color="#000000" face="Arial" size="2"><span class="">
<div dir="ltr">
<div><br></div>
<div>You only need the Differential which goes inside the pumpkin and rear
axle. As Derf said you want one that has 10/39 on the top of the
differential case but check yours first to see which you have now! There
were at least 3 available. Early cars were 4.22 to 1, then there is 3.9
to 1 and the shorter 4.22 to 1. The 4.22 is great for autocross -
the taller geared 3.77 for highway use. As was noted, the taller
gears are getting hard to find and usually demand a suitable hunk of
cash.</div>
<div><br></div>
<div>If you find a 3.9 or 3.77 that's inside a rear axle case and the seller
won't part it out, buy the whole thing. You'll need help picking it up!!
DAMHIK....</div>
<div><br></div>
<div>Cheers!</div>
<div>Jim</div></div>
</span><div class="gmail_extra"><br>
<div class="gmail_quote"><span class="">On Sun, May 10, 2015 at 9:29 AM, derf via Spridgets
<span dir="ltr"><<a title="mailto:spridgets@autox.team.net" href="mailto:spridgets@autox.team.net" target="_blank">spridgets@autox.team.net</a>></span> wrote:<br>
</span><blockquote class="gmail_quote" style="PADDING-LEFT:1ex;MARGIN:0px 0px 0px 0.8ex;BORDER-LEFT:#ccc 1px solid"><span class="">
<div dir="ltr">I know the basics but will have to defer on the details.
This is where Frank would chime in and sort it all out. There are
others who know and share, but none like him. Really miss that
guy. <br></div>
</span><span class=""><div>
<div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sun, May 10, 2015 at 9:22 AM, ryan.kubanoff--- via
Spridgets <span dir="ltr"><<a title="mailto:spridgets@autox.team.net" href="mailto:spridgets@autox.team.net" target="_blank">spridgets@autox.team.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT:1ex;MARGIN:0px 0px 0px 0.8ex;BORDER-LEFT:#ccc 1px solid">
<div>
<div style="FONT-SIZE:12pt;FONT-FAMILY:Arial;COLOR:#000000">
<div>So if I go to carlisle import show next weekend what should I be on
the lookout for or what should I avoid? looking for rear pumpkin or
whole rear axle? how can I tell if possible whats good and whats
crap?</div>
<div>Thanks </div>
<div>Ryan</div>
<div><br></div>
<hr>
<div style="FONT-SIZE:12pt;TEXT-DECORATION:none;FONT-FAMILY:Helvetica,Arial,sans-serif;FONT-WEIGHT:normal;COLOR:#000;FONT-STYLE:normal"><b>From:
</b>"derf" <<a title="mailto:derf247@gmail.com" href="mailto:derf247@gmail.com" target="_blank">derf247@gmail.com</a>><br><b>To: </b>"Ryan Kubanoff"
<<a title="mailto:ryan.kubanoff@comcast.net" href="mailto:ryan.kubanoff@comcast.net" target="_blank">ryan.kubanoff@comcast.net</a>><br><b>Cc: </b>"spridgets"
<<a title="mailto:spridgets@autox.team.net" href="mailto:spridgets@autox.team.net" target="_blank">spridgets@autox.team.net</a>><br><b>Sent: </b>Sunday, May
10, 2015 8:39:29 AM<br><b>Subject: </b>Re: [Spridgets] More highway speed
for a bugeye?
<div>
<div><br>
<div><br></div>
<div dir="ltr">You might also look into stronger axle shafts while you're
doing rear end work. Any Spridget diff chunk should fit in your rear
housing. Just drop the drive shaft, pop the axles out, and swap the
chunk. Diff ratios are stamped on top of the chunk. "10/39" is
3.9. IIRC "9/38" is what you would have on your 4.22.<br></div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sun, May 10, 2015 at 5:59 AM, ryan.kubanoff---
via Spridgets <span dir="ltr"><<a title="mailto:spridgets@autox.team.net" href="mailto:spridgets@autox.team.net" target="_blank">spridgets@autox.team.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT:1ex;MARGIN:0px 0px 0px 0.8ex;BORDER-LEFT:#ccc 1px solid">
<div>
<div style="FONT-SIZE:12pt;FONT-FAMILY:Arial;COLOR:#000000">
<div>So i have a 74 midget with a 1275, rib case, and a stock rear that
will do 70+ on a highway no problem. Last year I bought a 60
bugeye that was modiifed by the previous owner to have a 998 cc motor,
rib case and a stock bugeye rear. It has more trouble with
highway speeds. Could I swap out the stock bugeye rear for a late
model midgets? Would that improve performance?</div>
<div>Thanks</div><span><span style="COLOR:#888888" color="#888888">
<div>Ryan</div></span></span></div></div></blockquote></div></div></div></div></div></div></div></blockquote></div></div></div></div></span></blockquote></div></div></font></blockquote></div></font></div></blockquote></div><br></div>