Gear ratio chart/calculator?

[Trip59]

Does anyone know of a good calculator or chart, or formula, to figure out what rear end I want to have in the truck? Finally test drove with the new 4 speed trans last night, in second by the time I cross the intersection, running high RPM's at 45-50.

I have a 3.73 now, dunno if I need to go to a 3.43 or 3.08 to get where I want, and trial and error would be expensive.

Trip

[hayhauler71]

http://www.ringpinion.com/Calc_RPM.aspx

this should help you out

[Twisted78SS]

Try this one

http://www.csgnetwork.com/gearratcalc.html

Was looking for one myself awhile back, and found this one.

[Trip59]

Originally Posted by hayhauler71

http://www.ringpinion.com/Calc_RPM.aspx

this should help you out

Perfect! I was having trouble finding something that would let me punch in the trans ratios (2 spline saginaw 4, so I have a listing of the ratios).

Originally Posted by Twisted78SS

Try this one

http://www.csgnetwork.com/gearratcalc.html

Was looking for one myself awhile back, and found this one.

I was getting some pretty funky results from this one, at one point it told me 4.79...

Thanks to you both! Now I just have to decide if I'm brave enough to do it, or if I want to pay someone... (I do have all the needed equipment, I've just not done one before).

Trip

[Twisted78SS]

I just remembered I saved a few I found on one of my sites.

Feel free to use any of these.

http://2heeldrive.com/Chevrolet/

Look under Calculators.