The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What rear end to use for my 59 Chevy pick up

mr48chev · 08-07-2017, 02:15 AM

Along with the tire size chart (first one) that I posted on your tire question there are charts that show what your engine rpm will be at X mph with what gear in the trans, what rear gear and what tire diameter.

Here are a few, some are easier to work than others.
http://www.advanced-ev.com/Calculators/TireSize/
https://www.ringpinion.com/calculators/Calc_RPM.aspx
http://www.wallaceracing.com/calc-gear-tire-rpm-mph.php

One thing to remember if that came out of a 97 Chevy truck the tire size was probably 245-75-16 which is 30.5 inches tall. Rear gear was 3.70 or 4.11 you want to compare that with your chosen tire size as the smaller the tire the faster the engine spins. That might not mean much cruising around town a night or two a week but if you decide to get on the long roads and from where you sit they are very long the engine will spin pretty tight with small tires and those gears if you keep up with your buds.

08-07-2017, 02:15 AM	#5
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,342	Re: What rear end to use for my 59 Chevy pick up Along with the tire size chart (first one) that I posted on your tire question there are charts that show what your engine rpm will be at X mph with what gear in the trans, what rear gear and what tire diameter. Here are a few, some are easier to work than others. http://www.advanced-ev.com/Calculators/TireSize/ https://www.ringpinion.com/calculators/Calc_RPM.aspx http://www.wallaceracing.com/calc-gear-tire-rpm-mph.php One thing to remember if that came out of a 97 Chevy truck the tire size was probably 245-75-16 which is 30.5 inches tall. Rear gear was 3.70 or 4.11 you want to compare that with your chosen tire size as the smaller the tire the faster the engine spins. That might not mean much cruising around town a night or two a week but if you decide to get on the long roads and from where you sit they are very long the engine will spin pretty tight with small tires and those gears if you keep up with your buds. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.