The books actually call it a 3.78. It's a 9 tooth pinion, 34 tooth ring. 34 divided by 9 = 3.7777... which rounds up to 3.78. AMC 15 only, 7-9/16" ring gear. ---------------- Date: Thu, 22 Jul 2010 11:27:28 -0400 (EDT) From:adh@xxxxxxxxxxxxxxxxx (Sandwich Maker) " From:das24rules@xxxxxxxxx " " before casper lost the rod bearing, i was getting 26 mpg. thats in a 62 " classic 2 door, 3spd manual. BEFORE the o/d. i think the gear in that was " something like 3.73?? i forgot now. oddball, 3.77. another oddball was 3.58. -- Frank Swygert Publisher, "American Motors Cars" Magazine (AMC) For all AMC enthusiasts http://www.amc-mag.com (free download available!) _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com