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Old 11-02-2015, 10:40 PM   #1
kdearing
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1970 gmc rearend

Would axles out of a 78 Chevy fit back in the 70 gmc rearend. Haven't ever messed with the gmc stuff and wasn't sure
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Old 11-02-2015, 11:40 PM   #2
swamp rat
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Re: 1970 gmc rearend

Thats an open question, 2wd, 4wd, 1500, 2500, leaves, coils.. Chances are yes it would need different spring and shock mounts.
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Old 11-03-2015, 12:18 AM   #3
nlped
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Re: 1970 gmc rearend

Axles or housing? The axles in a 73 up rearend are longer than either length 67-72's. 73 up Housing will "fit" with new perches & possibly shock mounts (leaf or trailing arm?).
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Old 11-03-2015, 12:56 PM   #4
michael bustamante
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Re: 1970 gmc rearend

axles will not slip in either 67-72 length housing. are you trying to switch to 5 lugs. early classic i think sells the shortened 5 lug axles. but 70 is a dual length axle year. youll have to measure the rear end before you order
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Old 11-03-2015, 11:16 PM   #5
volksworld
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Re: 1970 gmc rearend

when i put the 73 rear in my 70 leaf spring chevy the 70 6 lug axles and drums went right in and worked fine...after i converted to front discs i put 5 lugs back in....i believe 67-69 housings were narrower and axles shorter
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Old 11-04-2015, 08:25 PM   #6
Tireguy87
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Re: 1970 gmc rearend

Quote:
Originally Posted by swamp rat View Post
Thats an open question, 2wd, 4wd, 1500, 2500, leaves, coils.. Chances are yes it would need different spring and shock mounts.
1970 GMC 2wd SWB leaf spring rear. The plan was to take the axle shafts out of a scrap '78 2wd truck and swap them into my 1970 axle shafts in order to convert to 5 lug.
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