On 23 May 2006 01:30:29 GMT, my wrote:
>
>So I have what was sold to me as a
>
> 1971 Chevrolet K20
> 3/4 ton pickup
> Fleetside long bed
> 4WD
>
>I had one hell of a time finding a locker for the rear diff. No
>one could even figure out what the rear end was. Finally found
>an old guy who had an old Detroit Locker he put in. I guess
>there are not many options for the old rear ends. Especially
>when it is not the right rear end. Apparently an Eaton H052
>would be correct for the year or even a H072 if it was a 1-ton,
>unless it had a Dana. What it had/has is an Eaton H070 for a
>1965 1-ton.
>
>Would a 1-ton rear end fit a 3/4-ton frame?
>
>How can I tell if it is a 1-ton or 3/4-ton frame?
>
> Thanks,
>
On some 1 ton frames, the top and bottom of frame rails are about 1/4
inch wider. (I have seen this on 73 to 87 model but not sure if it was
different on 67 to 72) On the rear axles, GM used the HO52/72 up
through 72 in some models with 4x4 Some (mostly GMC) used 12 bolts if
they were 1/2 t, D60's if they were 3/4 t and D70's if one T. The
Eaton rear axle is easy to ID because it has a removable carrier pig
and no removable cover plate. If it has a ring gear thrust pad
adjuster on the side of carrier housing, it is a HO72 series axle. At
detriot locker is the old option for that tuff old axle (it is well
above a D60 in strength) The HO52/72 have the same interals gear and
locker wise and I have never been able to see much differencce in them
otherwise other than the thrust adjuster mentioned above
> Vic
>
>
>
-----------------
The SnoMan
www.thesnoman.com >> Stay informed about: Chevy 67-72 frames 
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