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#1 |
Registered User
Join Date: Jan 2005
Location: Landsale PA
Posts: 82
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68 GMC c20 rear question
I believe my GMC has a Dana with 456 gears, not 100% sure of gearing, either way its starting to whine when loaded. I think its the outer wheel bearings.
I am not a big fan of the 62mph top speed, and wanted input about wether to fix the bearings and still have the gearing issue(can I swap in 373s?) or does it make sense to hunt down a new rear? If so, what year rear will fit, I can weld the perch's if need be. It is a leaf spring rear. ![]() THanks, Bill |
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#2 |
Registered User
Join Date: Jan 2005
Location: Landsale PA
Posts: 82
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![]() Will a rear from a 73-87 truck fit my 68? Width, etc? THanks |
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#3 |
user # 2756
![]() Join Date: Jun 2001
Location: Chesapeake, Virginia
Posts: 4,612
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You can get higher gears for a dana60, but their is a carrier split at 4.10 so you'd need a new carrier, if you in fact have 4.56s. Your leaf spring rear should have 42.5" spring spacing so 73 and up rears will fit from a 3/4 ton. The 72 and older 4wd rear will not fit with out moving the perches, same w/ 1 ton rears.
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm ![]() |
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