'60 - '62 Frame and Rear Suspension

[1972RedNeck]

I have a couple of questions that I have been unable to find clear answers for lately. They all deal with '60 to '62 2wd frames and suspensions.

To start, they all have torsion bar front suspensions, correct?

And if they are the trailing are rear suspension, they have the "X" frame, correct? But what about the leaf sprung trucks? Did they still use the "X" frame?

Now for the the confusing part. Most all of the 1/2 tons I have been around have the trailing arm rear suspension - but I have seen a couple that are leaf sprung (and they both happened to be GMC's - coincidence?). I have also seen 3/4 ton trucks with trailing arms and leaf springs - but all the GMC's were leaf sprung.

So what was the deciding factor for whether or not the truck got leaves or coils? And are the frames the same between coil and leaf trucks?

[Brad54]

I can't answer the question about the X-frames, but I can answer about the leaf vs. trailing arm.

GMCs came standard with leaf spring rear suspension.
Chevy came standard with trailer arm rear suspension.

The Heavy Duty option for the GMC was trailing arm rear suspension.
The Heavy Duty option for Chevy was leaf spring rear suspension.

GMC came standard with the Dana 44 rear, and that is the HD option on the Chevy.
I've got a Dana 44 under my trailing arm Suburban, and a spare housing for it as well.

'60-'62 were all front torsion bar suspension, which requires the t-bar cross member, so I'd assume all the 2wd trucks had the X-frame.

-Brad

[1972RedNeck]

Were 3/4 tons frames bigger than 1/2 ton frames?