Foots 1988 Posted October 18 Share Posted October 18 (edited) 1984 r model My 2060 transmission just went down. i have a 2090 that i could put in. i know a 2060 has 0.60 overdrive ands a 2090 has a 0.71 overdrive. How much would this slow the truck down. Will run wide open now topping out around 72. Has 5.32 rears with 24.5 tires Would it still run around 65 top speed? Edited October 18 by Foots 1988 Quote Link to comment https://www.bigmacktrucks.com/topic/74653-t2090-vs-t2060/ Share on other sites More sharing options...
Tinman22 Posted October 18 Share Posted October 18 .71 w/5.02 rears and standup 24.5s is 72 mph at 2100 indicated. Quote Link to comment https://www.bigmacktrucks.com/topic/74653-t2090-vs-t2060/#findComment-560307 Share on other sites More sharing options...
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