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Old September 17th, 2016, 07:48 PM
David R Leifheit's Avatar
David R Leifheit David R Leifheit is offline
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Join Date: Jan 2013
Location: Dallas, Oregon
Truck: 1960-1966 1000-4000 series
Age: 62
Posts: 281
Rep Power: 166
David R Leifheit is a jewel in the roughDavid R Leifheit is a jewel in the roughDavid R Leifheit is a jewel in the rough
Default Re: Differences in GMC and Chevy Frames?

Quote:
Originally Posted by bpmcgee View Post
I just got my book out, and I was correct. 4wd (leaf spring) trucks had ladder-bar suspensions while 2wd (coil spring) trucks had x-frame.

B
Differs by year though.
Torsion bar front/coil rear are early (1960-1962)
coil front/leaf rear are later (1963-1966)

4 wheel drive is another (3rd) frame type.

From the club page:
http://6066gmcguy.com/GMCvsChevy.html

GMC:
1960-62:
Torsion Bar Front, Most all Models
Coil Spring Trailing Arm Rear - 1000, 1500
Leaf Spring Rear - 2500 & Larger
1963-66:
Coil Spring Front, 1000, 1500 & 2500
I-Beam Front Axle - 3500 & Larger
Leaf Spring Rear - All Models
Some Larger Trucks had Air Ride Springs.

Chevrolet:
1960-62:
Torsion Bar Front, Most all Models
Coil Spring Trailing Arm Rear - 10, 20
Leaf Spring Rear - 30 & Larger
1963-66:
Coil Spring Front, 10, 20 & 30
Coil Spring Trailing Arm Rear - 10, 20
I-Beam Front Axle - 50 & Larger
Leaf Spring Rear - 30 & Larger
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- David R Leifheit
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(2) 1961 1500
1962 1000
1963 2500
1963 4000
1964 2500
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