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#1 |
Junior Member
![]() Join Date: May 2016
Location: Regina, Saskatchewan
Posts: 83
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1970 rearend
i am looking for a posi rear end for my 1970 gmc .i have the chance to buy one from a 1978 blazer with 4.10 gears .can i install this center section in my housing or is it to new?
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#2 | |
Senior Member
![]() Join Date: Feb 2010
Location: Falls City, Nebraska "100 Miles From Nowhere"
Posts: 2,219
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Re: 1970 rearend
Quote:
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" ![]() "Be American, Buy American" ![]() |
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#3 |
Junior Member
![]() Join Date: May 2016
Location: Regina, Saskatchewan
Posts: 83
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Re: 1970 rearend
thank you that shows the difference know what to look for now
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#4 | |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,720
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Re: 1970 rearend
Quote:
If the Blazer is a 12 bolt you can swap the parts out. Buy the book on rebuilding 10 and 12 bolt Chevrolets. Check the pinion depth in Blazer 4.10 unit. Check the backlash in Blazer setup. Remove c-clips and pull axles. Remove carrier and ring gear. Remove pinion gear. Put pinion gear in '70 housing. Check pinion depth. Adjust to match what it was in Blazer housing. Put carrier and side shims in same as they were in Blazer housing. Adjust backlash. BUY THE BOOK THAT TELLS HOW TO DO THIS AND SHOWS THE TOOLS YOU NEED! I encourage everyone to do as much work as they can for themselves. But this job needs a little more info than you will get from asking on a message board post IMO.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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