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Old 08-01-2012, 08:45 AM   #168
AL in NY
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Join Date: May 2010
Location: Southern Upstate New York
Posts: 1,160
Default Re: F150 tranny with overdrive

chiliman, you may want to look into the 41.1% transmission further. The gear ratios in that transmission are; 1st = 3.006, 2nd =1.776, 3rd = 1.00 and fourth is .7087. Now if you do the math, with a 4.11 rear end ratio, the final drive ratios are 1st =12.35, 2nd =7.29, 3rd = 4.11 and fourth is 2.91. Compare this to a 3.78 rear and the 27.6% OD transmission and you get 1st = 12.28, 2nd = 7.25, 3rd = 3.78 and fourth is 2.96. Looks like the only big difference is 3rd gear, 4.11 verses 3.78. Using the 41.1% transmission is going to be way cheaper than buying all the guts you'll need to change it to a 27.6% OD transmission.
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