re-geared

[dru]

I just re-geared my Ranger and have a couple of questions.

Im driving home after the regear and my speedometer is reading 65mph at 23-2400rpm same as when i had the stock 3.73's and 29.5" tires. i know i wasnt actually hitting 65 because it didnt feel right and most of the other vehicles were flying by me.

27.5 inch tires stock to 29.5 inch tires what would be the difference in speedometer reading? Swapped the 3.73's to 4.56's still have the 29.5" tires whats the difference now? Is there a formula to figure this out?

thanks

i just found the tire change and gear change calculator. the gear calculator does not seem to be working on my computer. is it possible to use these together to determine my actual speed? or find the actual formula these calculators use?

 

[martin]

there's a guide in the tech library to figure out stuff like that.

 

[canyoncritter]

what gear were you in at 6400 rpm....1:1 "drive/4th" trans ratio at 6400 rpm with 4.56's and a 29.5 tire would = 123 mph


IF you were in OD/5th

a auto .75 , would put you at 164 mph and a manual .79 would put you at 156 mph at 6400 rpm. hopefully you were on the autobaun if cars were flying past you lol....

65 mph w/ 4.56's & 29.5 tires in 5th with a manual .79 = 2667 rpm
(same as above) OD with a auto .75 = 2532 rpm.

 

[dru]

lol... misprint, meant to read 2300-2400 rpm. i would have never caught it if you didnt mention it.

thanks

 

[DieselTech07]

here is a calculator I found and have used before
http://www.4lo.com/calc/gearratio.htm
the formula
http://www.4lo.com/images/gearratio-formula.gif