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10-12-2018, 01:59 PM
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#1 |
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Registered User
Join Date: Nov 2007
Location: Indianapolis
Posts: 1,160
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Rear end question
my 68 coil spring rear is the early one 55 1/2 inches, however the PO put 5 lug axles from a 78 chevy in it. I'm getting ready to install rear disc brakes but the axles are sticking out of the shaft about 1 1/2 inches on each side.
the rear says HA and the ratio is 14:43 (what are these ?) do I change axles or rear end housing to a 71-72 ? thanks, Larry |
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10-12-2018, 04:34 PM
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#2 |
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Registered User
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,794
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Re: Rear end question
43 divided by 14 = 3.08 gear ratio
other than that i got nothing as i like them but have not played with them before .
__________________
77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great. |
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10-12-2018, 06:39 PM
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#3 |
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Registered User
Join Date: Nov 2007
Location: Indianapolis
Posts: 1,160
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Re: Rear end question
thank you for the ratio
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10-12-2018, 11:32 PM
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#4 |
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60-66 Nut
  Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: Rear end question
All truck 12 bolts '63-'70 are 62" wide WMS to WMS. All truck 12 bolts '71-'82 are 63.5" wide WMS to WMS. It amazes me how many people thing they can just slide the '71-'82 axles into a '63-'70 housing and it will be OK. There are 5 lug conversion axles available for the '63-'70 housing. Which way to go depends on the condition of the rest of your differential and whether or not you have room for a wider differential.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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10-13-2018, 05:28 PM
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#5 |
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Registered User
Join Date: Nov 2007
Location: Indianapolis
Posts: 1,160
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Re: Rear end question
so I guess the answer to my question is to use after mart 68 5 lug axles to fit my housing
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10-13-2018, 11:50 PM
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#6 |
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60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: Rear end question
Is everything else in the differential is in good condition, then yes. You need a set of aftermarket 5 lug conversion axles for the '63-'70 truck 12 bolt.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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10-14-2018, 07:30 PM
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#7 |
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Registered User
Join Date: Nov 2007
Location: Indianapolis
Posts: 1,160
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Re: Rear end question
thank you CaptainFab
why does my manual list my axle as 30 1/2 inches long and aftermart axles are listed as 30 3/4 inches? |
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10-15-2018, 01:19 AM
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#8 | |
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60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: Rear end question
I do not know unless the aftermarket axles are just slightly longer for some reason. They are supposed to be 30-1/2" long. You might ask the manufacturer of the axles you are looking at.
Quote:
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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10-16-2018, 03:49 PM
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#9 | |
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Senior Member
Join Date: Dec 2011
Location: Moraga, CA
Posts: 799
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Re: Rear end question
Quote:
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(Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340 |
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10-16-2018, 05:31 PM
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#10 |
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Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: Rear end question
Way back in the day I did the same. (later 5 lug axles in my early housing).
I just made spacers out of steel and grade 8 bolts to hold the backing plates on. It worked!
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My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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10-16-2018, 06:18 PM
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#11 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,921
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Re: Rear end question
I used shorter Moser 5 lug conversion axles in the 1969 12-bolt housing in my truck. They fit perfect.
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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