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11-05-2007, 09:05 AM
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#1 |
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Keepin it runnin!
Join Date: Oct 2007
Location: Deep River, CT
Posts: 1,036
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3/4 ton front driveshaft
I was wondering if the drive shaft on a 1970 C/20 4x4 is suppose to be the small as the one on the Blazer. My 3/4 ton front driveshaft has only 2 U-joints unlike my Blazer which has 3, 2 in that CV style joint. Any knowledge would be appreciated. Reason I am asking is, I just bought the truck and have discovered a few re-engineered items that make me question things that look suspicious, and the welds on the front drive shaft don’t look like what I am use to seeing on 1970 trucks.
Frank
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1970 K-5 4X4 Blazer  1970 K-20 4X4 Long Bed "Liberty Means Responsibility, that is why most men dread it" |
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11-05-2007, 09:19 AM
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#2 |
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Post Whore
 
Join Date: Feb 2000
Location: Rose Hill, KS, USA
Posts: 12,686
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Re: 3/4 ton front driveshaft
My 69 K20 didn't have a cv joint on it's front driveshaft and I'm positive it was the stock one. Don't know about the one on my 70 K5 as it was gone when I bought the vehicle. Both trucks currently are using cv joint front driveshafts.
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1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 |
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11-05-2007, 12:06 PM
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#3 |
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Registered User
Join Date: Apr 2007
Location: Kalamazoo, Michigan, USA
Posts: 538
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Re: 3/4 ton front driveshaft
I have 3 u-joints on my 1970 k20 front drive shaft. I'm pretty sure they are original, at least they still have spicer u-joints in there, got them all cleaned up and I see spicer stamped into all the bearing cups.
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1970 K20, 350--- SOLD 05 silverado extended cab short box- duramax Jeep wrangler unlimited |
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11-05-2007, 12:23 PM
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#4 |
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Registered User
Join Date: Mar 2006
Location: USA
Posts: 21,019
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Re: 3/4 ton front driveshaft
Do you have any pics of the front driveshaft you are talking about?
If you can see anything in the pic..this is what a stock front driveshaft looks like.At the t-case end,there are 2 u joints,and another at the axle end.Maybe there is a newer driveshaft on your truck? |
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11-05-2007, 05:36 PM
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#5 | |
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Keepin it runnin!
Join Date: Oct 2007
Location: Deep River, CT
Posts: 1,036
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Re: 3/4 ton front driveshaft
Quote:
Frank
__________________
1970 K-5 4X4 Blazer 1970 K-20 4X4 Long Bed "Liberty Means Responsibility, that is why most men dread it" |
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11-06-2007, 09:59 AM
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#6 |
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Registered User
Join Date: Sep 2005
Location: 9000' Mountain Man
Posts: 326
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Re: 3/4 ton front driveshaft
I'm 99% sure 1970's had the cv joint. When I converted my 1970 2x4 to 4x4, I lengthened the 1971 front driveshaft that I used and removed the cv joint. Unless it's being used with full time 4x4, it's not needed.
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