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10-29-2009, 08:22 PM
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#1 |
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Registered User
Join Date: Aug 2008
Location: houston,
Posts: 8
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1966 Rear End Swap
Can someone tell me what year truck (car?) rear ends will fit my 1966 chevy pickup? (preferrably posi/5 or 6 lug)
I tried looking in the 1960-66 forum first, but no luck. i guess i'm too computer illiterate. Thanks, Tom Houston, TX |
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10-29-2009, 08:42 PM
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#2 |
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Registered User
Join Date: Oct 2008
Location: broken arrow oklahoma
Posts: 266
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Re: 1966 Rear End Swap
You could put any rearend in it that you want, all you have to do is change the axle perches.
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10-29-2009, 09:05 PM
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#3 |
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Registered User
Join Date: Jul 2009
Location: moore oklahoma
Posts: 36
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Re: 1966 Rear End Swap
there are kits out there like this one
http://www.classicperform.com/Store/...ck/6072RCK.htm looks like it would make it pretty simple and the price isnt bad |
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10-29-2009, 09:13 PM
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#4 |
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Member of the longbed union.
Join Date: Feb 2009
Location: Killeen, Tx
Posts: 2,158
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Re: 1966 Rear End Swap
Tom 63-69 is the same size from drum to drum. 63-64 are a 14 spline axle. 65 and up went to 30. 70-87 is a little bit wider then ours. You can still use this axle you will just have to get the correct back spacing wheels. Also 71 they changed to 5 lug. 63-70 is 6 lug. I hope this helps some.
check out this website. www.car-parts.com just look for axles in texas and you'll find a bunch. what are your plans with the one you have now and what gears in it?
__________________
Paul 88 GMC Crew Cab dually, 454/T400 64 LWB 400 HP 350/350T Bagged, under construction! Sold most of it! 92 S10 Iron Duke 5 speed, 5/7 drop for now. soon to be bagged. Sold http://67-72chevytrucks.com/vboard/s...59#post4637759 |
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10-30-2009, 09:00 AM
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#5 |
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Registered User
Join Date: Aug 2008
Location: houston,
Posts: 8
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Re: 1966 Rear End Swap
about my old rear end?
i dont know, i havent given it much thought. it has 3.73 gears (confirmed by counting ring and pinion teeth and dividing the # of ring teeth by the # of pinion teeth)--but i dont think it's posi. I read on the Internet (yeah, i know...), that limited-slip gears ARE posi-trac gears. i thought limited-slip only transferred torque/power to one rear wheel. whereas posi-trac transferred torque/power to both rear wheels. now, i'm totally confused. =( how do i go about confirming if a rear end is posi or not? |
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10-30-2009, 09:34 AM
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#6 |
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Registered User
Join Date: Aug 2008
Location: houston,
Posts: 8
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Re: 1966 Rear End Swap
another thought...
if i found 2 rear ends--a 63 (14 spline) and a 66 (30 spline), the 30 spline is stronger... correct? i seem to remember reading that it is. with my mods (350V8/700R4), i'm guessing i should find a 65-66 rear end. Last edited by tferbend; 10-30-2009 at 09:35 AM. |
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10-30-2009, 09:37 AM
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#7 |
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Registered User
Join Date: Aug 2008
Location: houston,
Posts: 8
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Re: 1966 Rear End Swap
also, are the 65-66 chevy truck rear-ends posi?
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10-31-2009, 12:13 AM
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#8 |
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Registered User
Join Date: Oct 2007
Location: New Zealand
Posts: 9
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Re: 1966 Rear End Swap
I got my local diff specialist to weld in a 9 inch Ford head so I have full choice of ratio,s and its still in my 8 lug full floater No cables to change and all stays the same...
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11-01-2009, 01:36 PM
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#9 |
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Registered User
Join Date: Oct 2009
Location: winnipeg,mb
Posts: 64
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Re: 1966 Rear End Swap
If by "fit in my truck" you mean "bolt in", then newest is 1972. I think 68-72 are 5 lug. The 30 spline would be a stronger rear than 14 spline, but if you're not beating on it you may never need that extra strength. Are you building a street truck or a drag racer? Gear ratio availability is more relevant I think, but a 3.73 with a 700r4 Sould work nice with a 28 to 30 inch tire height. If you're doing a 5 lug axle swap, just be careful with wheel backspacing. According to Lolife99 in the "track width" thread I started, http://67-72chevytrucks.com/vboard/s...83#post3595683 ,the 73-87 axles are 3/4 of an inch wider.
Ralph |
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11-01-2009, 10:29 PM
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#10 |
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Member of the longbed union.
Join Date: Feb 2009
Location: Killeen, Tx
Posts: 2,158
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Re: 1966 Rear End Swap
65-69 are the same 30 spline axle, Some are posi and some are open spider gears. 70-87 are wider, but you can bolt them in with the correct backspacing rims. 71-87 are 5 lug rims. 65-70 are 6 lug. Your best bet is to find a axle from 65-69 with a posi or just buy a posi with the correct gears you wanna run.
__________________
Paul 88 GMC Crew Cab dually, 454/T400 64 LWB 400 HP 350/350T Bagged, under construction! Sold most of it! 92 S10 Iron Duke 5 speed, 5/7 drop for now. soon to be bagged. Sold http://67-72chevytrucks.com/vboard/s...59#post4637759 |
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11-02-2009, 01:19 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: 1966 Rear End Swap
The '71-'87 C10 differentials are 1.5" wider than the '63-'69 C10 differentials. I understand that there is some question on the width of the '70 C10differentials.
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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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11-02-2009, 08:06 PM
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#12 |
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Member of the longbed union.
Join Date: Feb 2009
Location: Killeen, Tx
Posts: 2,158
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Re: 1966 Rear End Swap
thanks for the input on the 70 captain I didn't know that!
__________________
Paul 88 GMC Crew Cab dually, 454/T400 64 LWB 400 HP 350/350T Bagged, under construction! Sold most of it! 92 S10 Iron Duke 5 speed, 5/7 drop for now. soon to be bagged. Sold http://67-72chevytrucks.com/vboard/s...59#post4637759 |
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