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how can i tell if my rear end is geared
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<table border="0" cellpadding="1" cellspacing="1" width="99%" align="center"> <tr bgcolor="#000000"><td> <table border="0" width="100%" cellpadding="3" cellspacing="0"> <tr bgcolor="#000099"> <td colspan="2" align="left"> <font size="2" color="#ffffff" face="Verdana, Arial"> <b>T O P I C R E V I E W</b> </font></td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>87fox302</b> <br /><small>Member # 7655</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2007,5,30,15,31,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> so i slaped a new rearend on my stang and got ride of my old on...i belive that the gears i have on now are 273 when mine came with 308s im not sure it by lowering the gears it messes with the speed tak? <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>F8LSN8K</b> <br /><small>Member # 7080</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2007,5,30,16,8,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> </font><blockquote><font size="1" face="Verdana, Arial">quote:</font><hr /><font size="2" face="Verdana, Arial">Originally posted by 87fox302:<br /><strong> im not sure it by lowering the gears it messes with the speed tak? </strong></font><hr /></blockquote><font size="2" face="Verdana, Arial">yezzzur <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>opie</b> <br /><small>Member # 7693</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2007,6,2,0,28,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> You can mark the driveline and wheel, then rotate how many time the driveline spins to 1 full turn of the wheel. Its not perfect but it will give you an idea. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Curt</b> <br /><small>Member # 6254</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2007,6,2,12,40,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> 2.73 are actually higher gears<br /><br />I know that tach isn't really all that accurate but you can use this formula to determine your gear ratio; (RPM x Tire Diameter)/ (MPH x 336) = Gear ratio<br /><br />Say you were turning 2000 RPM @ 70MPH on 26in tires it would be (2000 x 26)/(70 x 336)------> (52000)/(21840)= 2.38<br /><br />Oh yeah, that formula is for a 1 to 1 transmission ratio, so you will have to get RPM and speed while in 4th gear <br /> </font> </td></tr> </table></td></tr></table> <br /> <br />
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