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07-10-2012, 12:14 AM
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#1 |
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Registered User
Join Date: Jul 2012
Location: Salina Kansas
Posts: 48
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What kind of rear end do I have???
I have a 1970 C-20 shortie with a utility bed. Judging by the dark green around the emblems, door jambs, etc... This is an old phone company truck. I would like to know what the rear end may be... gear ratio etc??? The truck is a manual transmission and I'm not sure what the original engine would have been. The truck currently has an inline 6, but the fenders say 8/350 below the C-20 emblem.
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07-10-2012, 12:39 AM
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#2 |
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Overdrive club
Join Date: Sep 2007
Location: apache junction, arizona
Posts: 819
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Re: What kind of rear end do I have???
That is a 12 bolt axle,1/2 ton variety!
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1971 c-10 1951 3100 chevy 1970 chevy c-30 Sold! |
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07-10-2012, 12:43 AM
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#3 | |
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Registered User
Join Date: Jul 2012
Location: Salina Kansas
Posts: 48
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Re: What kind of rear end do I have???
Quote:
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07-10-2012, 12:56 AM
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#4 |
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What?
Join Date: Jun 2007
Location: Southern California
Posts: 7,617
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Re: What kind of rear end do I have???
yep
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Chris 1968 K20 Suburban 1972 K10 LWB PU |
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07-10-2012, 08:04 AM
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#5 |
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Roadtrip!
 
Join Date: Feb 2003
Location: Grand Rapids MN
Posts: 13,717
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Re: What kind of rear end do I have???
I would say you have the wrong emblems on your truck. All 1/2 tons were 6 lug thru 70. And no C-20 shortbeds were ever built. Your truck appears to be a 1/2 ton.
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67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto |
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07-10-2012, 09:31 AM
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#6 |
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I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: What kind of rear end do I have???
Best "guess" on rear axle ratio is a 3:73 to 1.You can check the SPID in the glovebox for a option or since it looks like it's up in the air you can rotate the driveshaft and count wheel revolutions.One turn of the driveshaft should turn the wheel 3 times or almost 4. 3:08-3:73-4:11 are possibilities.The 3:73 would be standard with a manual.There is also a code stamped on the axle,pass side IIRC that will be a number that can be croossreferenced.You'll have to crawl under there and wir brush it well to see it.
__________________
The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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07-10-2012, 09:34 AM
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#7 |
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I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: What kind of rear end do I have???
Here's a thread on axle ratio count.
http://67-72chevytrucks.com/vboard/s...d.php?t=532388
__________________
The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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07-10-2012, 09:42 AM
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#8 |
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Active Member
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: What kind of rear end do I have???
Re. emblems. The paint that has peeled off is a different color than the truck's interior. More that likely fenders were damaged and swapped.
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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07-10-2012, 04:36 PM
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#9 |
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Registered User
Join Date: Jul 2012
Location: Salina Kansas
Posts: 48
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Re: What kind of rear end do I have???
Thanks for all the input! 2 posts on this site and I've already learned a lot! Love it!
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07-11-2012, 01:09 AM
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#10 |
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Registered User
Join Date: Apr 2008
Location: Julian, CA
Posts: 696
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Re: What kind of rear end do I have???
Love that bed.
__________________
Specializing in OEM 67-72 Chevy & GMC parts since 2001 1969 GMC Longhorn 396 1969 Chevy 3/4 ton LWB 396 1983 Toyota pickup 22R 2012 Toyota Scion Xb |
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