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03-30-2011, 03:29 PM
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#1 |
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Registered User
Join Date: Mar 2011
Location: lindsay, ca
Posts: 2
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6 lug to 5 lug rear axle swap
can i put 1971 5 lug rear axles in to my 1965 chevy c-10? i see on napaonline.com they have an axle set with bearings and seals for $174.00. all the conversion kits i've seen are for 1963-1970. 1963-64 need an axle gear set as well. if the conversion works for a 1970, then why can't you just put a 1971 axles in to a 1965 rearend? any advice?
Last edited by unclemnstr1965; 03-30-2011 at 03:43 PM. Reason: entered wrong year |
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03-30-2011, 03:43 PM
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#2 |
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Registered User
Join Date: Mar 2002
Location: Forney TX
Posts: 4,512
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Re: 6 lug to 5 lug rear axle swap
I was wondering this a while back and if memory serves me correctly(don't quote me) #1 the reason they say you need side gears is because early models ran 17 spline spider gears and #2 I believe the 71-2 axles (5lug) are wider than the 64-5-6 model rears. I know also 68-69 gmc axles are wider than 64-5-6. You might check on the "70" 5 lug axles I didn't know they had them that year.
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03-30-2011, 03:55 PM
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#3 |
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Registered User
Join Date: Mar 2011
Location: lindsay, ca
Posts: 2
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Re: 6 lug to 5 lug rear axle swap
you're probably right... i thought 5 lug came out in 1967 for some reason. guess because of the body change. thanks.
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03-30-2011, 04:13 PM
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#4 |
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Registered User
Join Date: Mar 2011
Location: South Jersey
Posts: 234
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Re: 6 lug to 5 lug rear axle swap
5 lug started in '71 as far as I know.
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03-30-2011, 04:43 PM
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#5 |
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Registered User
Join Date: Sep 2009
Location: California Delta
Posts: 2,163
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Re: 6 lug to 5 lug rear axle swap
CPP has them.
1960-64 Complete 5-lug Rear Axle Conversion, 30-3/4", kit:: http://www.classicperform.com/Store/...k/6364RACK.htm 1965-69 Complete 5-lug Rear Axle Conversion, 30-3/4",kit: http://www.classicperform.com/Store/...k/6569RACK.htm
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Name: Rich Current Ride: 1964 C-10 Short Fleetside Daily Driver: 2005 GMC crew cab short fleetside /2001 Chevy Tahoe Past GM Trucks: 1959 GMC short stepside 1968 GMC short stepside-4x4 1973 Chevy short stepside 1989 Chevy short fleetside-reg cab 1993 Chevy short fleetside-Xcab 2002 Chevy short fleetside-Xcab Save the dinosaurs, use synthetic oil. |
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03-30-2011, 09:35 PM
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#7 |
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Registered User
Join Date: Jan 2008
Location: oldfort tn
Posts: 1,183
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Re: 6 lug to 5 lug rear axle swap
i just had my original 65 axles redrilled to 5 lug,drums too, just cost 80 bucks for it all. poor mans way out .
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03-30-2011, 10:25 PM
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#8 | |
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Senior Member
 
Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,373
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Re: 6 lug to 5 lug rear axle swap
Quote:
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A husband can be right...or...A husband can be happy.  67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.  1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc   JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder! |
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03-31-2011, 12:28 AM
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#9 |
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Junior Member
 Join Date: Mar 2007
Location: DAYTON
Posts: 505
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Re: 6 lug to 5 lug rear axle swap
71 axles are longer than your 65 I do believe
I had my 67 axles redrilled & the center turned down for $50. using 71 & up 5 lug drums
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frontstreetcycle on Instagram Last edited by scrapmetalart; 03-31-2011 at 12:30 AM. |
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03-31-2011, 12:50 AM
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#10 |
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Registered User
Join Date: Sep 2009
Location: California Delta
Posts: 2,163
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Re: 6 lug to 5 lug rear axle swap
I'm guessing the 70 went to a 3/4" longer axles but kept the 6 lug. In 71 they went to 5 lug with the longer axles. CPP lists the 70 axles at 31.5" as compared to the 60-66 axles at 30.75".
__________________
Name: Rich Current Ride: 1964 C-10 Short Fleetside Daily Driver: 2005 GMC crew cab short fleetside /2001 Chevy Tahoe Past GM Trucks: 1959 GMC short stepside 1968 GMC short stepside-4x4 1973 Chevy short stepside 1989 Chevy short fleetside-reg cab 1993 Chevy short fleetside-Xcab 2002 Chevy short fleetside-Xcab Save the dinosaurs, use synthetic oil. |
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03-31-2011, 12:59 AM
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#11 |
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60-66 Nut
 Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
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Re: 6 lug to 5 lug rear axle swap
1970 was the transition year for the width of the rear differentials, Typically the early '70 rear differentials were the narrower version as the prevoius years. The late '70 differentials were 1.5" wider overall (.750 per side) like the '71 and up differentials. That is why you can't use a '71 and up axles in the '63-early '70 differential housing.
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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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03-31-2011, 09:41 AM
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#12 |
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Registered User
Join Date: Mar 2010
Location: seymour in
Posts: 76
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Re: 6 lug to 5 lug rear axle swap
why dont you just switch the whole housing with axles ? that's what i did on my 63. I took a rear end out of a 72 1/2 ton it bolted right up.
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03-31-2011, 09:55 AM
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#13 | |
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Registered User
Join Date: Jan 2010
Location: Forsyth, Ga
Posts: 1,012
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Re: 6 lug to 5 lug rear axle swap
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04-01-2011, 07:55 AM
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#14 | |
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UCA63
Join Date: Aug 2005
Location: Lloydminster AB Can.
Posts: 1,637
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Re: 6 lug to 5 lug rear axle swap
Quote:
T
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member#7816 "63 sb ss bbw 350\350 12 bolt rear Pwr Fr Disc PS tilt '61 GMC in progress '63 GMC to use for parts '90 Chevy Ext cab sbfs 5.7l (current d d) |
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04-01-2011, 08:35 AM
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#15 |
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Account Suspended
Join Date: Mar 2011
Location: hastings mn
Posts: 186
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Re: 6 lug to 5 lug rear axle swap
Why not run the 6 lug?
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04-01-2011, 08:42 AM
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#16 | |
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Registered User
Join Date: Jan 2010
Location: Forsyth, Ga
Posts: 1,012
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Re: 6 lug to 5 lug rear axle swap
Quote:
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04-01-2011, 11:44 AM
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#17 | |
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Registered User
Join Date: May 2005
Location: Beaverton, OR
Posts: 3,728
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Re: 6 lug to 5 lug rear axle swap
Quote:
Captainfab, I have a '66 C10 rear. If I have the axles redrilled, could I use one of your disc conversions? I would like to use the Camaro caliper with built in e-brake.
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04-01-2011, 11:49 PM
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#18 | |
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60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
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Re: 6 lug to 5 lug rear axle swap
Yes you can use the Camaro caliper brackets with redrilled axles, but you would need to have the center register turned down to about 3.06" You know I do have the 6 lug rear disc brackets that utilize the Camaro calipers with a 13" rotor. The drawback to those is that you will need a 16" or bigger wheel.
Quote:
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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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04-09-2014, 01:13 PM
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#19 |
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Registered User
Join Date: Mar 2014
Location: norman ok
Posts: 11
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Re: 6 lug to 5 lug rear axle swap
I have a 70 and mines a 6 lug Ll around
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02-18-2015, 07:27 PM
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#20 |
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Registered User
Join Date: Nov 2009
Location: Austin Texas
Posts: 370
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Re: 6 lug to 5 lug rear axle swap
Digging up an old thread here but I have some axles I'm gonna re drill to 5 lug but just wanna make sure they're the right length. I had bought a 12 bolt a while back and used the carrier and pinion so I could get the gears I wanted. I used my old axles and ended up with an extra set. They measure 30 3/4 from the back of the flange to the end of the splines.
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02-18-2015, 09:35 PM
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#21 |
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Registered User
Join Date: Nov 2009
Location: Austin Texas
Posts: 370
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Re: 6 lug to 5 lug rear axle swap
Anybody?
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BaBaBooey BaBaBooey GO SPURS GO!!! |
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02-18-2015, 10:31 PM
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#22 |
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Registered User
Join Date: Feb 2015
Location: las cruces
Posts: 218
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Re: 6 lug to 5 lug rear axle swap
I guess if you are just using yours as a daily driver, not as a work truck, not to say that there is anything wrong with that, mine has 8 lugs
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02-18-2015, 10:49 PM
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#23 | |
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Registered User
Join Date: Nov 2009
Location: Austin Texas
Posts: 370
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Re: 6 lug to 5 lug rear axle swap
Quote:
?? ^^^Doesn't really make sense, or answer my question, or help even. My front is 5 lug since I put disc brakes and I'd like to match the rear to the front so I can run spider caps instead of baby moons. It's a half ton too
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BaBaBooey BaBaBooey GO SPURS GO!!! |
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02-19-2015, 12:36 AM
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#24 |
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60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
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Re: 6 lug to 5 lug rear axle swap
Typically the '63 to early '70 12 bolt axles measure 30.5". So I would say your 30.75" axles are correct, just a little variance in the measuring method.
__________________
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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02-19-2015, 02:38 AM
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#25 |
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Registered User
Join Date: Aug 2013
Location: Rochester Wa.
Posts: 395
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Re: 6 lug to 5 lug rear axle swap
Hi, I just put a mid 80s suburban 308 rear end in my 70 gmc. More info in my build thread on it, I took the 5 lug axles out of it and put the stock 70 gmc 6 lug axles right in there, was a really fast easy swap. My buddy did the exaxt same thing 6 years ago with is 67 chev, still working great,
Have a good week
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