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If you really want to mess with your options and make comparisons I have an Excel spreadsheet I made that allows you to compare two trannies against a stock one. It displays a line chart using RPM vs. MPH so you can visually see where your gearing (and tire size!) will put you. http://www.icbm.org/erkson/personal/gearing.zip Toby Erkson -- air_cooled_nut@pobox.com '72 VW Squareback, '95 VW Jetta, '81 Gold Wing http://www.icbm.org/ Portland, Oregon ----- Original Message ----- > In the near future I will be getting a rebuilt 4-sp trans to go with a 1679 engine in a daily driver. Would there be any benefit to changing the R&P to 3.88 or changing 3rd to something like 1.37? There would be a loss of torque but the stronger engine may make up for that. Would the lower RPMs at crusing seriously affect the cooling? I had thought about a 5-sp but they're too expensive for this budget. ------------------------------------------------------------------- List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org