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Old 04-23-2013, 06:40 PM   #1
425HP409
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WTB: 71-72 rear differential

I need a 71-72 1/2 ton rear differential housing, bare will be OK.
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68 SWB, Dad bought new, now 396 & factory ac
64 Impala SS, 409 425HP, 4 speed AC
64 Bel Air Wagon, 400 Small Block
57 Bel Air all original 283 w/Factory Air
77 GMC Sprint, 454/425HP
67 Olds 442, all original
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Old 04-23-2013, 07:45 PM   #2
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Re: WTB: 71-72 rear differential

Quote:
Originally Posted by 425HP409 View Post
I need a 71-72 1/2 ton rear differential housing, bare will be OK.
Your avitar has a 68, did you know the rear end is slightly wider on a 71-72?
I may know where there is a housing, I am checking now
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Old 04-23-2013, 07:50 PM   #3
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Re: WTB: 71-72 rear differential

1 1/2 plus wider. I have one I will give ya if you are doing a 68, but it comes with a long travel from florida.
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Old 04-23-2013, 07:59 PM   #4
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Re: WTB: 71-72 rear differential

i got a one from a 70
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Old 04-23-2013, 09:21 PM   #5
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Re: WTB: 71-72 rear differential

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Originally Posted by chevytruckluver View Post
Your avitar has a 68, did you know the rear end is slightly wider on a 71-72?
I may know where there is a housing, I am checking now
Yes I know it is wider, I went to 5 lug and put 72 axles in my housing and they are too long.
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68 SWB, Dad bought new, now 396 & factory ac
64 Impala SS, 409 425HP, 4 speed AC
64 Bel Air Wagon, 400 Small Block
57 Bel Air all original 283 w/Factory Air
77 GMC Sprint, 454/425HP
67 Olds 442, all original
90 ZR1 Corvette
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Old 04-23-2013, 09:30 PM   #6
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Re: WTB: 71-72 rear differential

Hmmm, you know if you change housings to reuse the 72 axles you will have to have some one set up the gears, you can not just swap the center section without checking pinion depth and backlash, would also require new crush sleeve and seals.
The best option is to get some 5 lug axles from Moser engineering that will fit the 68 rear housing. they will run you about 250.00
then sell the 72 axles
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Old 04-24-2013, 12:00 AM   #7
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Re: WTB: 71-72 rear differential

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Originally Posted by chevytruckluver View Post
Hmmm, you know if you change housings to reuse the 72 axles you will have to have some one set up the gears, you can not just swap the center section without checking pinion depth and backlash, would also require new crush sleeve and seals.
The best option is to get some 5 lug axles from Moser engineering that will fit the 68 rear housing. they will run you about 250.00
then sell the 72 axles
I was wondering if someone made the short 5 lug axles, but forgot to check on it before posting this. That would be a whole lot easier too....I'll try Moser, thanks.
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68 SWB, Dad bought new, now 396 & factory ac
64 Impala SS, 409 425HP, 4 speed AC
64 Bel Air Wagon, 400 Small Block
57 Bel Air all original 283 w/Factory Air
77 GMC Sprint, 454/425HP
67 Olds 442, all original
90 ZR1 Corvette

Last edited by 425HP409; 04-24-2013 at 12:18 AM.
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Old 04-24-2013, 01:58 AM   #8
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Re: WTB: 71-72 rear differential

Let me know if you want to sell the 72 axles. They should work in my 70 rear end.
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Old 04-24-2013, 09:42 AM   #9
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Re: WTB: 71-72 rear differential

Quote:
Originally Posted by 425HP409 View Post
I was wondering if someone made the short 5 lug axles, but forgot to check on it before posting this. That would be a whole lot easier too....I'll try Moser, thanks.
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Moser sells them, ECE sells them, Summit sells them, etc lots of choices, .
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Old 04-24-2013, 10:31 AM   #10
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Re: WTB: 71-72 rear differential

you're looking for 30 1/2" long from the mounting flange to the end of the splines (early rear end) The later ones are 31 5/16" long from this same measurement.

I agree, I'd do the early setup, you can run less backspacing too (your wheels will appear wider) Your early housing is highly desirable too, especially on the bagged trucks simply because it's a bit narrower. Your 71-72 5lug axles will be an easy sale.
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Old 04-24-2013, 11:28 PM   #11
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Re: WTB: 71-72 rear differential

I found the early 30.5" 5 lug axles from my differential parts supplier in Dallas for under $150 each. Yahoo.....
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68 SWB, Dad bought new, now 396 & factory ac
64 Impala SS, 409 425HP, 4 speed AC
64 Bel Air Wagon, 400 Small Block
57 Bel Air all original 283 w/Factory Air
77 GMC Sprint, 454/425HP
67 Olds 442, all original
90 ZR1 Corvette
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Old 04-24-2013, 11:29 PM   #12
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Re: WTB: 71-72 rear differential

Quote:
Originally Posted by Vova View Post
Let me know if you want to sell the 72 axles. They should work in my 70 rear end.
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You have first dibs on my 72 axles
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68 SWB, Dad bought new, now 396 & factory ac
64 Impala SS, 409 425HP, 4 speed AC
64 Bel Air Wagon, 400 Small Block
57 Bel Air all original 283 w/Factory Air
77 GMC Sprint, 454/425HP
67 Olds 442, all original
90 ZR1 Corvette
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