Thanks for the explanation David can tell me if the 10 tooth 3.90 is the biggest or if the language is has the most teeth? Also more importantly where on the rear can I read which one I have on Pinky, as I know it was larger when Frank looked at it when I got her home from LA back on 2006.<div>Lin</div><div>62 California Sprite "Pinky"<span></span> <br><br>On Monday, December 7, 2015, David Lieb via Spridgets <<a href="mailto:spridgets@autox.team.net">spridgets@autox.team.net</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">There is a significant market for the 3.77 pumpkin for Spridgeters trying to reduce the rpm at highway cruising speeds (yes, a 5-speed is more effective at this) as well as replacements for whiny and broken diffs. The 3.90's10-tooth pinion gear is more rugged than the 3.77's 9-tooth pinion. The 3.77 was only used for the last two years of production, while the 3.90 ran for about ten years, so it is usually easier to find a decent 3.90.<div>David L<br><div class="gmail_extra"><br></div></div></div>
</blockquote></div><br><br>-- <br><div dir="ltr"><span style="font-size:small">"Pay if forward" in honor of Frank Clarici III, Spritenut</span><br></div><br>