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02-26-2004, 09:47 PM
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#1 |
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Registered User
Join Date: May 2000
Location: Victoria, BC, Canada
Posts: 2,409
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Rear axle interchangeability?
OK, its been 4 years since I swapped complete front ends from 1970 drum to 1971 discs. As many of you know thats also a swap from 6 lug to 5 lug. So whats the deal on getting 5 lug in the rear? Can I use axles from a '71, '72 or later or will I have to get an entire rear end from a later year truck? Current gear ratio is 3.07, coil spring susp.
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1970 GMC 1500 Custom Original 350/TH350 Victoria, BC, Canada You can wish in one hand and crap in the other. See which one gets filled first. |
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02-26-2004, 09:53 PM
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#2 |
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Account Suspended
Join Date: May 2002
Location: I let ya know as soon as I know
Posts: 3,593
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as far as I know Al, the axles were shorter in 67 only. 60-72 should work just fine
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02-26-2004, 09:59 PM
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#3 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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1970 trucks could have the longer axles like the 71-2's or the axles could be the shorter ones like the 67-69's. If you have the longer axles, it is a straight forward swap, (axle for axle). Otherwise change the rearend, redrill your axles or use spacers on the longer axles.
I believe the longer axle rear end is 57 3/4" between the backing plates. The shorter one is 56 1/2". I would suggest measuring so you know what your options are. Jim |
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02-26-2004, 10:33 PM
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#4 |
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Registered User
Join Date: Jan 2003
Location: Washington State
Posts: 8,831
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Saw a post awhile back that said there are two different axle widths...........
Can someone verify........
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1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo |
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02-26-2004, 11:21 PM
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#5 |
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Gotta Startem Early
Join Date: Oct 2001
Location: Amarillo, TX, USA
Posts: 364
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If you want to pay for them, Early Classic offers a set of axles with 5lug pattern.
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67 SWB In Progress, one piece at a time, maybe 3 years I will be finished |
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02-26-2004, 11:51 PM
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#6 | |
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Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,283
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if you want them and want me to check the width, i have a set of 5 lug axles in a 70 12 bolt rear case
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ASE Master Certified-GM Trained-Mechanic 1968 Chevy C30 157" WB Wrecker 1969 Chevy CST/10 SWB 1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed 1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205 1974 Chevy Custom Deluxe/10 1979 Chevy Custom Deluxe K10 farm truck beater 1989 Chevy K2500 Quote:
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02-27-2004, 12:53 AM
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#7 |
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Registered User
Join Date: May 2000
Location: Victoria, BC, Canada
Posts: 2,409
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No, I don't really want to pay for them brand new,
 . But I'll opt for getting them "previously enjoyed" from the boneyard. I know a place where I can dig some up, I just have to make sure I'm getting the right ones. So I'll take some measurements and assume that the donor truck with the same dimensions will be the one I need.
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1970 GMC 1500 Custom Original 350/TH350 Victoria, BC, Canada You can wish in one hand and crap in the other. See which one gets filled first. |
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02-27-2004, 01:32 AM
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#8 |
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former desert rat
Join Date: Feb 2003
Location: salt lake city, utah Home of the 3 M's Mormons, methlabs and minivans
Posts: 320
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I have read on the board that some people are using a spacer between the axle and the flange to make up the distance. I have never seen it done, but I wouldnt think it were impossible.
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94 Chevy Silverado Ext cab 4/6 drop w/ 18's and 2500watt system (work truck). 67 Chevy swb under const. frame off custom, 20's, bagged and a large rat under the hood,and a 1940 Chevy truck under const. |
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02-27-2004, 02:26 AM
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#9 |
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Cowboy Fan for Life!!!!!!
Join Date: Apr 2002
Location: Amelia, Virginia
Posts: 2,921
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JimKshortstep4x4 hit it on the head, 67-69 is one length, 71-2 is another length and a '70 could have been either. Hope this helps.........Jerry
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1967 ShortBed Fleetside 3/4 Drop 350/700R4 Tilt wheel 18 x 8 Torque Thrust II's Future mods: All new gauges & wood bed My Zip is 23002 I ship UPS, USPS |
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02-27-2004, 11:12 AM
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#10 |
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Registered User
 
Join Date: Apr 2000
Location: Bradenton, FL
Posts: 1,036
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My 70 had the longer ones and I got some out of a 77 PU with a 12 bolt.
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1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters |
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