C-30 Rear Brakes?

[GOOD2GO]

I need to replace a drum on my c30 longhorn.
I do have a couple of question though....
1. are the brake drums the same for both the corporate and dana 60 rears? My longhorn has the corporate rearend. My local autoparts store only has one part number for a '69 c-30?
2. what size is the large nut that needs to be removed to get to the drum off?

Thanks in advance!!!!!!!

[Bob Moore]

IIR Eaton and Dana use different drums. Dana is usually held on with 2 countersunk screws. Eaton is different - I don't have one - I don't know.

I do know Dana.

[jku72]

They are not the same drums, but sorry I dont know the nut size.

[Longhorn Man]

Not only are they not the same drums, but you probably won't find any new drums. They haven't been made in some 20 years or so. I even have a contact here locally for real hard to find brake parts, he hasn't seen SRW one ton 67 - 72 Corp drums in at least 15 years.
Personally, I say it's time for an upgrade. That's my plan. I still have about 2 years on my brakes, then it's do or die.

[GOOD2GO]

Longhorn Man - What are you going to upgrade too? Dana 60
If so will it bolt in and the existing drive shaft work with the Dana?
What are you planning on doing?

[dwaite72lnghrn]

Yep time to upgrade to a 14b FF, Lots of parts available.

[Longhorn Man]

If I can get my hands on a Dana out of a big block truck... I'd be beyond happy.
Other than that, i haven't thought about it too much. I still have 2 years or so.

[dwaite72lnghrn]

Why a BB truck? They came on 3/4 4x4 and some GMC 3/4 2wd's.

[GOOD2GO]

the big block trucks have 3.52 ratio

[da-burb]

Actually Dana 60's would have a 3.54 ratio behind the big blocks(usually). I have 2 and they are both posi but neither are longhorn axles.

But I do have 2 very nice single rear wheel drums which came off a longhorn axle. I am thinking they are 71-72 though which would be wider than your 69's. If shipping to Canada doesn't kill it or the wider drums drop me a PM.

[Longhorn Man]

da-burb hit it... I want the gears.

[67_C-30]

Originally Posted by Longhorn Man

da-burb hit it... I want the gears.

70's Ferd 3/4 tons have Dana 60's, and are plentiful. I have one with 3.54's and one with 3.30's. Moving the perchs is very easy to do.

[Karl Hoh]

Originally Posted by 67_C-30

70's Ferd 3/4 tons have Dana 60's, and are plentiful. I have one with 3.54's and one with 3.30's. Moving the perchs is very easy to do.

My 89 dodge farm truck is equipped with a dana 60. Factory 3.54, changed to 4.10, now 3.30

[chickenwing]

Sound like a long-shot but call these guys up. http://sacramento.citysearch.com/profile/1233404 Wish I could remember the name of the ole guy that helped me... But they did not mind going to the books to look for parts and they were CHEAP.

Edit: They specialize in heavy vehicle clutch and brake parts. They are not a maintenance facility.

Found their website. http://www.ccbparts.com/default.htm

[GOOD2GO]

Update......
Well Longhorn Man, I took your advice and went looking for a new rear end.
Went out to a firends today that had a '78 14 bolt rearend. I looked at it and took some measurements. Then he suggested that we go to his neighbours who had lots of old stuff. If he didn't have a 71 c20 behind the barn. I bought the complete eaton rear out of it for 60 bucks. I figure one of the drums should be salvagable for my truck.
Question - How is the availablity of brake components for the rear (besides the drums)?
and are the front brake components still available and standard for all c30's?

Thanks alot in adavance !!!!!

I just want to get her on the road....I can't wait!!!!

[1969 GMC]

there are disc brake kits available for the Eaton, to me it would make more sense to swap to disks than get a whole new axle which may have different gears.

[Longhorn Man]

Originally Posted by 1969 GMC

there are disc brake kits available for the Eaton, to me it would make more sense to swap to disks than get a whole new axle which may have different gears.

Most ppl would give there left nut to get better gears. 4.10s really suck in the freeway.
Besides, disks in the rear are kinda pointless (onless you do alot of mud runnin) and you'd still have an outdated rear with impossable to find parts.

Good to go... with the exception of seals, pretty much EVERYTHING will be a PITA to locate for an HO72. From drum to drum, and everything in between.

[1969 GMC]

Originally Posted by Longhorn Man

Most ppl would give there left nut to get better gears. 4.10s really suck in the freeway.
Besides, disks in the rear are kinda pointless (onless you do alot of mud runnin) and you'd still have an outdated rear with impossable to find parts.

Good to go... with the exception of seals, pretty much EVERYTHING will be a PITA to locate for an HO72. From drum to drum, and everything in between.

D'oh! I keep thinking we're talking about 4x4's...but we're talkin about 2wds. So finding matching gears doesnt really matter

As far as the impossible to find parts...as a CarQuest employee, I couldn't disagree more. Drums, ok...but the other stuff can be had. There was an Eaton part # thread a while back in the 4x4 forum, alot of good info there.

[wibilly]

i just converted to rear disks on mine.it cost me $310 with new caddy calipers with parking break and all new seals brakets and used roters turned and i have enough parts left over to do another 5 lug axel from my scavaging. as far as theinternals in a eaton the can be replaced with 14 bolt parts. check out pirate 4x4.com

[wibilly]

67c30 how does the width compare i'm with longhorn man 4.10s suck on the highway

[67_C-30]

They measure just about the same. I can't recall the exact number, but they are very close. I will be on the yard tomorrow, and I will pull a tape on them. I was going to use the 3.30 geared one in my '67 C-30 until I decided to go with '92 C3500 chassis with an OD tranny.

Another good alternative is 3.42 geared 14 bolts. Down here, in the early 80's, Alabama Power used to order tons of 3/4 LWB stepside P/U's with 250 L6 / SM465 4 speeds, and 3.42 geared 14b FF's. I'm sure a lot of these trucks were spec'd out the same for other municipalities, park rangers, civil service, etc.

[wibilly]

3.42s would be perfect with the caddy engines

[GOOD2GO]

I measured my eaton yesterday before I went looking for another rear and it measures 65 inches from lug flange to lug flange

[Longhorn Man]

OK, then please prove me wrong... I just went through this last year, have one of the best NAPA guys you can find.
Get me the price and avalability for the shoes, adjuster kits, hdwr kits and brake cylinders for a 70 SRW one ton without dana axle. (9000 GVW, 7200 rear)
Last year, I replaced one set of shoes, 3 brake cylinders, springs/hdwr kits all around, 2 adjusters, 4 seals, 2 inner and 2 outer bearings for the front, and I think that's about it... I was out $500 (that is with a prety decent discount) when it was all done and over... and I still have 4 old drums, front shoes are old, and one brake cylinder that can pop any day.
Not trying to be cockey here... just I spent a small fortune on junk that is still marginally worthless.

[wibilly]

andy if your interested i saved all the hardware that was any good from my eaton i thinnk i have 1 good wheel cyl 1 good backing plate ajusters and springs i think the drums were both shot i'll look your welcome to any or all if you want it