Borg-Warner "T-10" 4-Speed boxes have been used in three different series in production, and are available in two other seriesas aftermarket items. All gear sets interchange. However, there are differences in throw-out bearing and collar thatshould be considered. The T-10 "V" (Close) used with 68-69 model 390 engines incorporated a large front bearing cap (#318 5168) and throw out bearing (#320 7521). All other T-10's (including the aftermarket Super T-10) use a smaller bearing and cap. Wide "T" series (1st=2.64, 2nd=2.10, 3rd=1.49, 4th=1.00) Wide "P" series ( 1st=2.43, 2nd= 1.76, 3rd=1.47, 4th=1.00) Close "V" series ( 1st= 2.23, 2nd= 1.77, 3rd= 1.35, 4th=1.00) Super T-10 wide "W" series (1st=2.64, 2nd= 1.75 3rd= 1.33 4th= 1.00) Super T-10 Close "S" series (1st= 2.43, 2nd= 1.61, 3rd= 1.23 4th= 1.00) Hope This helps, Larry Turman ps. For performance applications, the larger parts should be used. Gear ratio depends on type of compettition. --- On Mon, 9/21/09, dan whitehead <freebird_58@xxxxxxxxxxx> wrote: From: dan whitehead <freebird_58@xxxxxxxxxxx> Subject: [AMC-list] 4 speed - wide/close ratio? To: "amc list" <amc-list@xxxxxxxxxxxx> Date: Monday, September 21, 2009, 6:19 PM I have a 4 speed from my AMX and was wondering how to tell the difference between wide and close ratio. Is there a way from outside or do I have to pull the side cover to check gears? Dan Whitehead _________________________________________________________________ Bing™ brings you maps, menus, and reviews organized in one place. Try it now. http://www.bing.com/search?q=restaurants&form=MLOGEN&publ=WLHMTAG&crea=TEXT_MLOGEN_Core_tagline_local_1x1 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://list.amc-list.com/pipermail/amc-list-amc-list.com/attachments/20090922/34d48cef/attachment.htm> _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://list.amc-list.com/pipermail/amc-list-amc-list.com/attachments/20090922/0117654b/attachment.htm> _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com