what are the differences between a C10, C10HD, and C20 spindle?

[moregrip]

Currently in the planning stages of a C20 8lug build and I want to keep the 8lugs....does anyone know what the differences are between the 3 spindles? Short of buying a set of each and physically measuring the differences I was hoping some/all of the info was already out there. Thanks!

[J Knight]

Are you refering to things like shaft diameter bearing size etc?

[moregrip]

Originally Posted by J Knight

Are you refering to things like shaft diameter bearing size etc?

mostly the ball joint and steering mounts, height of the spindle etc.

[lolife99]

C20 spindle is completely different.
Different upper and lower balljoint and tie rod hole sizes.

Light Duty and HD C10 spindles share the same upper, lower, and outer tie rod hole sizes.
The bearings are different for the rotor.
This means they take specific rotors and calipers depending on which spindle you use.

What exactly are you trying to do?

[moregrip]

Originally Posted by lolife99

C20 spindle is completely different.
Different upper and lower balljoint and tie rod hole sizes.

Light Duty and HD C10 spindles share the same upper, lower, and outer tie rod hole sizes.
The bearings are different for the rotor.
This means they take specific rotors and calipers depending on which spindle you use.

What exactly are you trying to do?

Maybe over-thinking things a bit but knowing that I want to retain the 8lug setup....and availability of C20 lowered/sport suspension possibly adapting 1500 suspension to 8 lug spindles.

[lolife99]

www.performanceonline.com sells C20 drop spindles.

I wouldn't screw with 88-98 c2500 8-lug parts.
It's not neccessary.

[moregrip]

Will there work?

http://westernchassisinc.com/shop/60...-drop-spindle/

[J Knight]

Originally Posted by moregrip

Will there work?

http://westernchassisinc.com/shop/60...-drop-spindle/

Looks like the right one to me.

[lolife99]

Originally Posted by moregrip

Will there work?

http://westernchassisinc.com/shop/60...-drop-spindle/

The $313 price is for C10 spindles, which is high because you can buy c10 spindles for $219 every day.
At the bottom of that page they say the following:

1960 to 1987 Chevy / GMC C20 drop spindle for GMC / Chevy C20 Trucks:
We have the correct applications (5 different) with the right tapers and geometry to fit the exact truck your customers have.
Chevy / GMC C20 drop spindle available for the following years:

•60-62 GMC / Chevy C20 1/2 Ton (requires factory 1973+ disc brakes)
•63-70 GMC / Chevy C20 1/2 Ton (requires factory 1973+ disc brakes)
•71-72 GMC / Chevy C20 1/2 Ton 1 1/4" Rotor (may require disc brake upgrade)
•73-87 GMC / Chevy C20 Heavy; 1/2 Ton 1 1/4" Rotor
•81-87 GMC / Chevy C20 Light; 1/2 Ton 1" Rotor

C20 spindles are around $400, just because there is not as much demand for them.

[J Knight]

•60-62 GMC / Chevy C20 1/2 Ton (requires factory 1973+ disc brakes)
•63-70 GMC / Chevy C20 1/2 Ton (requires factory 1973+ disc brakes)
•71-72 GMC / Chevy C20 1/2 Ton 1 1/4" Rotor (may require disc brake upgrade)
•73-87 GMC / Chevy C20 Heavy; 1/2 Ton 1 1/4" Rotor
•81-87 GMC / Chevy C20 Light; 1/2 Ton 1" Rotor


Something doesnt add up here. C20 1/2 ton? I didnt know there was such a thing. Are these spindles to fit c20 control arms to install 5 lug 1/2 ton rotors? As in a conversion spindle?

[lolife99]

Originally Posted by J Knight

•60-62 GMC / Chevy C20 1/2 Ton (requires factory 1973+ disc brakes)
•63-70 GMC / Chevy C20 1/2 Ton (requires factory 1973+ disc brakes)
•71-72 GMC / Chevy C20 1/2 Ton 1 1/4" Rotor (may require disc brake upgrade)
•73-87 GMC / Chevy C20 Heavy; 1/2 Ton 1 1/4" Rotor
•81-87 GMC / Chevy C20 Light; 1/2 Ton 1" Rotor


Something doesnt add up here. C20 1/2 ton? I didnt know there was such a thing. Are these spindles to fit c20 control arms to install 5 lug 1/2 ton rotors? As in a conversion spindle?

I don't think so.
I think it's a "cut and paste typo".

Western Chassis started this whole drop spindle business.
They are trying to get their sh#t together and keep their business going but I'm beginning to wonder.
Their prices are too high.

There are other places to buy C10 and C20 spindles.
That's where I would look.

[moregrip]

Originally Posted by lolife99

I don't think so.
I think it's a "cut and paste typo".

Western Chassis started this whole drop spindle business.
They are trying to get their sh#t together and keep their business going but I'm beginning to wonder.
Their prices are too high.

There are other places to buy C10 and C20 spindles.
That's where I would look.

Are there quality issues with any of them? The 3 i know about for C20s are POL, Chassis Tech, and Western Chassis.
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[lolife99]

Stay away from Chassis Tech,...

[lolife99]

Belltech makes a C30 spindle.
They have the same balljoint holes and tie rod holes as the 73-87 C20 trucks.
I think the brake caliper it takes,... is different than the 73-87 C20 brake caliper.

http://www.summitracing.com/parts/be...30?prefilter=1

[moregrip]

Rgr....looks like i have more research to do
Posted via Mobile Device

[chevybuilder18]

Drop spindles may be different, but couldnt he just mess with the A arms and switch those as well? aftmarket specials, could have the right drop height and retain the stock 8 lug spindles. summits catalog has changed on ALOT, does anyone here go through summit? Your frame bolt holes could be the same as the lighter trucks, dropping with an A arm built for the c10 hd and putting your 8 lug spindles on could trick it out. Last time i check summit had the A arms that lower your truck, both top and bottom A arms.

[lolife99]

I like using Summit.
But "drop pocket" a-arms like DJM sells is old technology.
Spindles are a much better way to drop the front end.
Besides C20 lower a-arms have a larger balljoint and balljoint hole,... than the C10 version.

[moregrip]

Originally Posted by lolife99

Belltech makes a C30 spindle.
They have the same balljoint holes and tie rod holes as the 73-87 C20 trucks.
I think the brake caliper it takes,... is different than the 73-87 C20 brake caliper.

http://www.summitracing.com/parts/be...30?prefilter=1

Sent Belltech an email about fitment, probably hear back later this week or next with this being the season and all.

[chevybuilder18]

I didnt know the tubular drop A arms were old technology..
I think the drop spindles are cheaper any way thought he could just trick something. just all for a good cause. Which ones would you guys prefer except for the Beltech? im new to drop spindles and dropping trucks, cars ect but ive always wanted a low riding stepside chevy. sorry moregrip, im just wanting to know a lil bit more, not meaning to jack the thread, keep us posted.

[lolife99]

Originally Posted by chevybuilder18

I didnt know the tubular drop A arms were old technology..

Tubular arms are not.
The "Drop pocket" version that DJM sells definitely is.

It's basically like takin a stock control arm and building a box under the bottom so the coil spring can hang through the a-arm.
These are terrible as far as ground clearance issues and scrubline issues.
And you shouldn't use these with drop spindles.

Tubular a-arms that have camber and caster gains are great.
Companies like CPP and Hotchkis make great coil spring a-arms.

Porterbuilt makes great coil spring, coil over, and air bag a-arms.

Ridetech makes coilover and air bag a-arms.

[chevybuilder18]

Originally Posted by lolife99

Tubular arms are not.
The "Drop pocket" version that DJM sells definitely is.

It's basically like takin a stock control arm and building a box under the bottom so the coil spring can hand through the a-arm.
These are terrible as far as ground clearance issues and scrubline issues.
ANd you shouldn't use these with drop spindles.

Tubular a-arms that have camber and caster gains are great.
Companies like CPP and Hotchkis make great coil spring a-arms.

Porterbuilt makes great coil spring, coil over, and air bag a-arms.

Ridetech makes coilover and air bag a-arms.

Thank you for your response. LOL i was suggesting the tubular design my bad.

[lolife99]

This is the crappy "drop pocket" design.

[chevybuilder18]

Originally Posted by lolife99

This is the crappy "drop pocket" design.

If they updated these, i think more people would like them. how much of a drop do they give you?

[moregrip]

Originally Posted by chevybuilder18

I didnt know the tubular drop A arms were old technology..
I think the drop spindles are cheaper any way thought he could just trick something. just all for a good cause. Which ones would you guys prefer except for the Beltech? im new to drop spindles and dropping trucks, cars ect but ive always wanted a low riding stepside chevy. sorry moregrip, im just wanting to know a lil bit more, not meaning to jack the thread, keep us posted.

Let's keep this going and see if we can figure it all out brother! No need to apologize.

I would love to get some hard numbers posted up, spindle OD, rod end hole ID's, etc etc of each spindle....that way we all know what exactly we're dealing with and will have a better idea of what might work!