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01-12-2014, 06:33 PM
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#1 |
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Registered User
Join Date: Mar 2013
Location: Campbellsville, KY
Posts: 888
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'74 Rear Axle Application
The '74 K10 I bought last fall has had the rear axle swapped to an 8-lug, full-floating 14-bolt - FWIW, the front is a 6-lug Dana 44. The truck was originally a 454/auto with HD springs - would this have come with a 10 bolt from the factory, or a 12 bolt semi-float 6-lug? Also, as far as spring perches, shock mounts, etc. go, will a 10 or 12 bolt axle out of any 73-87 10 or 20 series truck bolt up to the K10 rear suspension?
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Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue. |
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01-15-2014, 03:20 AM
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#2 |
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Registered User
Join Date: Mar 2013
Location: Campbellsville, KY
Posts: 888
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Re: '74 Rear Axle Application
Any ideas?
__________________
Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue. |
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01-15-2014, 09:47 AM
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#3 |
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Registered User
Join Date: Jan 2014
Location: Swaledale, IA
Posts: 485
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Re: '74 Rear Axle Application
If it was a 74' K10, you would have had the factory 12 bolt semi-floater when it was new. They started using the 10-bolt rear later on (don't know when). I believe any year 12 bolt should fit, just make sure the gear ratios match the front axle.
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01-15-2014, 12:38 PM
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#4 |
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Registered User
Join Date: Mar 2013
Location: Campbellsville, KY
Posts: 888
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Re: '74 Rear Axle Application
Right on. Thanks!
__________________
Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue. |
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01-15-2014, 03:34 PM
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#5 |
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Gentleman Jim Driver
Join Date: Nov 2002
Location: Poulsbo, WA
Posts: 1,553
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Re: '74 Rear Axle Application
The shock mount brackets are different between a 2wd and 4x4 axle. It's only a slight difference.
Also, the axle lengths are slightly different between the 2wd and 4x4. I've interchanged them in the past and it seemed to work ok.
__________________
Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed |
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01-16-2014, 03:19 AM
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#6 |
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Registered User
Join Date: Mar 2013
Location: Campbellsville, KY
Posts: 888
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Re: '74 Rear Axle Application
Good to know. If I do find a possibly swap-able axle I'll compare/measure.
__________________
Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue. |
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01-16-2014, 08:09 AM
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#7 |
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Gentleman Jim Driver
Join Date: Nov 2002
Location: Poulsbo, WA
Posts: 1,553
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Re: '74 Rear Axle Application
__________________
Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed |
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01-16-2014, 03:20 PM
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#8 |
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Registered User
Join Date: Mar 2013
Location: Campbellsville, KY
Posts: 888
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Re: '74 Rear Axle Application
Ah! I see. Good to know. The mount holes for the shock studs on the frame have been moved down about 3 in. - maybe they figured out after the swap that the mounts are different, but compensated on the other end.
__________________
Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue. |
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