GreenGiant2 Posted December 14, 2010 Share Posted December 14, 2010 I AM LOOKING AT A SET OF ROCKWELL REARS WITH A RATIO OF 4.88. THE TRUCK WILL ALSO HAVE A 13 SPEED FULLER ROADRANGER. WHAT AM I LOOKING AT FOR A TOP SPEED WITH MY ENGINE RPM AT 2150.THANKS GG2 Quote We the unwilling, Lead by the unqualified, are doing the impossible, for the ungrateful. Link to comment https://www.bigmacktrucks.com/topic/16860-rockwell-rears/ Share on other sites More sharing options...
theakerstwo Posted December 14, 2010 Share Posted December 14, 2010 I AM LOOKING AT A SET OF ROCKWELL REARS WITH A RATIO OF 4.88. THE TRUCK WILL ALSO HAVE A 13 SPEED FULLER ROADRANGER. WHAT AM I LOOKING AT FOR A TOP SPEED WITH MY ENGINE RPM AT 2150.THANKS GG2We need the size of your tires. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/16860-rockwell-rears/#findComment-68544 Share on other sites More sharing options...
GreenGiant2 Posted December 15, 2010 Author Share Posted December 15, 2010 We need the size of your tires.SORRY 11.22.5 DONT KNOW MUCH MORE Quote We the unwilling, Lead by the unqualified, are doing the impossible, for the ungrateful. Link to comment https://www.bigmacktrucks.com/topic/16860-rockwell-rears/#findComment-68545 Share on other sites More sharing options...
RowdyRebel Posted December 15, 2010 Share Posted December 15, 2010 I AM LOOKING AT A SET OF ROCKWELL REARS WITH A RATIO OF 4.88. THE TRUCK WILL ALSO HAVE A 13 SPEED FULLER ROADRANGER. WHAT AM I LOOKING AT FOR A TOP SPEED WITH MY ENGINE RPM AT 2150.THANKS GG2What's the final drive in the transmission? Quote When approaching a 4-way stop, the vehicle with the biggest tires has the right of way! Link to comment https://www.bigmacktrucks.com/topic/16860-rockwell-rears/#findComment-68547 Share on other sites More sharing options...
GreenGiant2 Posted December 15, 2010 Author Share Posted December 15, 2010 What's the final drive in the transmission?MY GUESS IS .73 FROM WHAT I SAW ON THE FULLER SITE. Quote We the unwilling, Lead by the unqualified, are doing the impossible, for the ungrateful. Link to comment https://www.bigmacktrucks.com/topic/16860-rockwell-rears/#findComment-68549 Share on other sites More sharing options...
RowdyRebel Posted December 15, 2010 Share Posted December 15, 2010 MY GUESS IS .73 FROM WHAT I SAW ON THE FULLER SITE.http://www.4lo.com/calc/gearratio.htm tells me it'll be around 71.8 Quote When approaching a 4-way stop, the vehicle with the biggest tires has the right of way! Link to comment https://www.bigmacktrucks.com/topic/16860-rockwell-rears/#findComment-68550 Share on other sites More sharing options...
GreenGiant2 Posted December 15, 2010 Author Share Posted December 15, 2010 http://www.4lo.com/calc/gearratio.htm tells me it'll be around 71.8THANKS ROWDY Quote We the unwilling, Lead by the unqualified, are doing the impossible, for the ungrateful. Link to comment https://www.bigmacktrucks.com/topic/16860-rockwell-rears/#findComment-68551 Share on other sites More sharing options...
Bollweevil Posted December 15, 2010 Share Posted December 15, 2010 MY GUESS IS .73 FROM WHAT I SAW ON THE FULLER SITE. .87 Quote Link to comment https://www.bigmacktrucks.com/topic/16860-rockwell-rears/#findComment-68563 Share on other sites More sharing options...
GreenGiant2 Posted December 15, 2010 Author Share Posted December 15, 2010 .87what would that do then raise or lower my speed Quote We the unwilling, Lead by the unqualified, are doing the impossible, for the ungrateful. Link to comment https://www.bigmacktrucks.com/topic/16860-rockwell-rears/#findComment-68580 Share on other sites More sharing options...
JStevens120 Posted December 15, 2010 Share Posted December 15, 2010 Using the same numbers as rowdy and changing the trans ratio I got 60.3 MPH with a .87 Quote Link to comment https://www.bigmacktrucks.com/topic/16860-rockwell-rears/#findComment-68587 Share on other sites More sharing options...
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