How to tell a c-20 from a c-30 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kandeservices · 10-01-2006, 07:55 PM

Hello,

We just bought a 1980 chevy truck with a dump body from a salvage yard. According to the vin number it is a 1980 Chevrolet two wheel drive C-20 cab and chasis built in Baltimore. I am having a hard time getting brake parts for the truck. The parts coming off the truck do not match what is listed. The truck has dual rear wheels and eight lug wheels.

Can anyone tell he how to tell the difference between a c-20 and c-30? Also, can anyone give me a clue how to find rotors, calipers, and flexible brake lines with out using the vehicle description?

Thanks,
Karl
K and E Services

84 400 · 10-01-2006, 08:29 PM

Quote:

Originally Posted by kandeservices

Hello,

We just bought a 1980 chevy truck with a dump body from a salvage yard. According to the vin number it is a 1980 Chevrolet two wheel drive C-20 cab and chasis built in Baltimore. I am having a hard time getting brake parts for the truck. The parts coming off the truck do not match what is listed. The truck has dual rear wheels and eight lug wheels.

Can anyone tell he how to tell the difference between a c-20 and c-30? Also, can anyone give me a clue how to find rotors, calipers, and flexible brake lines with out using the vehicle description?

Thanks,
Karl
K and E Services

it might have c30 axles in it that some one swapped.

MylilBowTie · 10-01-2006, 09:40 PM

Im not sure if I have ever seen a 3/4 ton dually. I would bet its had a cab change if anything. I would look up one ton parts and see if that helps you get the right parts.

kandeservices · 10-02-2006, 11:28 PM

Thanks for your help.

Charlie at the parst store somehow figured out that it has a P-20 axle.

What is a P-20 ?

odee · 10-05-2006, 10:00 PM

p=step van series 20=3/4 ton 30=ton I would say someone swapped cabs and or rearends around.

magnethead · 10-05-2006, 10:44 PM

I was about to say, check to see if it's a corp 14 bolt or Dana 70. Haven't heard of P-20. I'll also bet cab change.

look on the axle tubes- if you see little slag chunks on the tube in a location other than where the springs are mounted (+- about 4"), i bet the axle has been swapped too- the 3/4 and 1 ton frames are i believe 8 (confirm?) inches narrower to accomodate the extra tires with minimal flaring.

10-01-2006, 07:55 PM	#1
kandeservices Registered User Join Date: Oct 2006 Location: delaware Posts: 2	How to tell a c-20 from a c-30 Hello, We just bought a 1980 chevy truck with a dump body from a salvage yard. According to the vin number it is a 1980 Chevrolet two wheel drive C-20 cab and chasis built in Baltimore. I am having a hard time getting brake parts for the truck. The parts coming off the truck do not match what is listed. The truck has dual rear wheels and eight lug wheels. Can anyone tell he how to tell the difference between a c-20 and c-30? Also, can anyone give me a clue how to find rotors, calipers, and flexible brake lines with out using the vehicle description? Thanks, Karl K and E Services

10-01-2006, 09:40 PM	#3
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Re: How to tell a c-20 from a c-30 Im not sure if I have ever seen a 3/4 ton dually. I would bet its had a cab change if anything. I would look up one ton parts and see if that helps you get the right parts. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

10-02-2006, 11:28 PM	#4
kandeservices Registered User Join Date: Oct 2006 Location: delaware Posts: 2	Re: How to tell a c-20 from a c-30 Thanks for your help. Charlie at the parst store somehow figured out that it has a P-20 axle. What is a P-20 ?

10-05-2006, 10:00 PM	#5
odee Registered User Join Date: Nov 2004 Location: big stone gap va Posts: 83	Re: How to tell a c-20 from a c-30 p=step van series 20=3/4 ton 30=ton I would say someone swapped cabs and or rearends around.

10-05-2006, 10:44 PM	#6
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	Re: How to tell a c-20 from a c-30 I was about to say, check to see if it's a corp 14 bolt or Dana 70. Haven't heard of P-20. I'll also bet cab change. look on the axle tubes- if you see little slag chunks on the tube in a location other than where the springs are mounted (+- about 4"), i bet the axle has been swapped too- the 3/4 and 1 ton frames are i believe 8 (confirm?) inches narrower to accomodate the extra tires with minimal flaring. Last edited by magnethead; 10-05-2006 at 10:46 PM.



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