C30 Gear Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

5Tractorguy · 03-05-2018, 09:12 PM

Looking at a 1964 C30 with 283 V8 and 4 speed. I know diff gears can alter this too...

What is the average top/cruising speed for a truck like this? Just curious before I get too into this rig.

padresag · 03-05-2018, 09:44 PM

shows that it should have 5:14s in it. not designed for cruising the freeway>
https://onedrive.live.com/?cid=9169A...%21354&o=OneUp

ron

Gargoyle · 03-05-2018, 10:14 PM

My '62 has a 283 and 5.14 gears and I made two 400-500 mile road trips in it, 55 mph was about top speed.

Short 3/4 · 03-05-2018, 11:07 PM

May have the optional 4.57 ratio and somebody may have swapped in a 4.10. These are the only three ratios it can have if it still has the ho72 rear. Only way to tell for sure is to jack up the rear, spin it and do the math. No matter what you are still looking at a top speed of 60 at best, which is really as fast as you want to go in one of these trucks.

5Tractorguy · 03-05-2018, 11:28 PM

Thanks guys. Looking at getting another truck and this one caught my eye. Main concern is to do 55-60. Not sure if I'll end up buying it... going to do some more searching around for a bit.

dmulally · 03-06-2018, 10:23 PM

Providing you know the tyre height, have a place with the link below:

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

03-05-2018, 09:12 PM	#1
5Tractorguy Registered User Join Date: May 2015 Location: Central Massachusetts Posts: 494	C30 Gear Question Looking at a 1964 C30 with 283 V8 and 4 speed. I know diff gears can alter this too... What is the average top/cruising speed for a truck like this? Just curious before I get too into this rig. __________________ Jake 5Tractorguy on Youtube

03-05-2018, 09:44 PM	#2
padresag Registered User Join Date: Feb 2008 Location: Sidney,b.c. Posts: 4,425	Re: C30 Gear Question shows that it should have 5:14s in it. not designed for cruising the freeway> https://onedrive.live.com/?cid=9169A...%21354&o=OneUp ron

03-05-2018, 10:14 PM	#3
Gargoyle Registered User Join Date: Nov 2013 Location: Blacksburg, VA Posts: 289	Re: C30 Gear Question My '62 has a 283 and 5.14 gears and I made two 400-500 mile road trips in it, 55 mph was about top speed.

03-05-2018, 11:07 PM	#4
Short 3/4 Registered User Join Date: Jan 2017 Location: Los Osos Ca Posts: 530	Re: C30 Gear Question May have the optional 4.57 ratio and somebody may have swapped in a 4.10. These are the only three ratios it can have if it still has the ho72 rear. Only way to tell for sure is to jack up the rear, spin it and do the math. No matter what you are still looking at a top speed of 60 at best, which is really as fast as you want to go in one of these trucks. __________________ 65 short stepside K10 292-SM420-T221 8 lug closed D44 front NoSpin HO72 4.10 rear

03-05-2018, 11:28 PM	#5
5Tractorguy Registered User Join Date: May 2015 Location: Central Massachusetts Posts: 494	Re: C30 Gear Question Thanks guys. Looking at getting another truck and this one caught my eye. Main concern is to do 55-60. Not sure if I'll end up buying it... going to do some more searching around for a bit. __________________ Jake 5Tractorguy on Youtube

03-06-2018, 10:23 PM	#6
dmulally Registered User Join Date: Feb 2018 Location: Shannon, New Zealand Posts: 31	Re: C30 Gear Question Providing you know the tyre height, have a place with the link below: http://www.csgnetwork.com/multirpmcalc.html



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