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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>I have 2:88 with 205/60-13 tires- runs 3000 rpms at 70 mph. Kirk<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Tigers <tigers-bounces@autox.team.net> <b>On Behalf Of </b>Joel Martin via Tigers<br><b>Sent:</b> Saturday, November 16, 2019 8:03 AM<br><b>To:</b> Tiger List Serve <tigers@autox.team.net><br><b>Subject:</b> [Tigers] Tiger Differential<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>The manual shows that Tiger rear ends are: Salisbury hypoid ‘4.HA’ with a 2.88 to 1 ratio. What does the 4.HA stand for?<o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>My understanding is these are posi traction meaning both wheels are applying power.<o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>Those of you with 2.88 rear ratio gears, wide ratio 4 speed top loader transmissions, what is your RPM’s in fourth at 50, 60,70 & 80 MPH? <o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>Those of you running other rear end rations, other factors the same, what are your RPM’s at the same speed and what ratio?<o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>I like to drive my cars and just got back from a 1,263 mile 6 day trip in my original owner 1973 MGB with 229,000 miles on the car. <o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>Things to consider: 1966 MK1A with 289 HiPo motor with about 300 HP and estimated 9.4.1 compression<o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>600 cfm 4 barrel Holley carburetor<o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>Headers with 2.25” exhaust<o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>15” wheels running 205\50 x 15 tires<o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>Wide ratio top loader 4 speed transmission<o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>Believe Salisbury posi rear end <o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>Closed, open, locked, posi, ratios – the list is endless. What I am looking for is a very streetable around town and on the highway posi rear end ratio that will work well with a good balance between acceleration for fun and highway cruising. I am not there yet. I have the acceleration for fun part in place but not the highway cruising (of course - avoid highways\interstate).<o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>Data means a lot regarding RPM’s at speeds between 50 to 80 mph. Those of you who have switched ratios, please share your pros and cons.<o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>Thank you for your input.<o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>Regards<o:p></o:p></span></p><p class=ydpe3a33268msonormal><span style='font-size:12.0pt;font-family:"Garamond",serif'>Joel Martin<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Garamond",serif'><o:p> </o:p></span></p></div></div></div></body></html>