1984 Winnebego RV P30 Chassis 454 Th475 and REAR DISK BRAKES.

So some of you may remember, I was able to snag a vandalized RV from where I worked since we can't sell them. Noone wants them, scrap yards won't take them cuz of all the wood, plastic, glass and fibreglass. So we have to pay money to take them to the dump, have the loaders, knock the coach off the frame for us, and that much debis is not cheap to dump, then we haul the frame and power train to the scrapyard and get maybe $30. To much work and money to get rid of them so the tow yards take a big loss on them. So I asked for it, and bossman asked what do you want it for, it'll never have a title. I said, I won't title it. Will I ever see it again and what are you doing with it, how do I know you won't just rob some parts and then park it on the street, and the city comes at me again. I told, that won't happen, I'll leave it in Pott County instead so OK county won't know about it. hahahaha, he said, UHHHHHHHHHHH NOOOOO !!! I laughed and said, no for real, you'll never had to worry. I'll be trashing it at my shop dumpster little at a time and it'll be parked on my off grid to rob for parts to build my bus, and then the frame I want to use to build a walking bridge across a big ravine I have on the property. He made me prommise, he'd never see it again. And he's not going to. We just had FREE dump at our local county, and I got rid of 2 truck loads already. But this thing has only 39,000 miles and an unmolested 454 that I know for a fact, I'll make run again, and that Th475 is a good strong transmission I intend to use too. Soooo BUT... with all that said....

So it looks bigger to me, but everything I've read claims this will be a 14 bolt Full Float Rear Axle. It has a big ass stabilizer bar on it, and it runs 19.5 wheels and tires, and has some big ass rotors on the back too. So I'm thinking, if this thing is a 14B full float, Why won't those rotora and brackets fit my 14B full float in my C20 or the Mud Truck build? Granted, I still have to do something about a park brake, cuz this RV uses the driveshaft drum brake on the tailshaft. Does this sound right? Anyone know for certain? These some biggo rotors and some biggo calipers. Might just be an optimal disk brake set up for one of my Squares.

Well nevermind, what was I thinking. The 10 bolt lug pattern alone kills it for me to take this Rear Disk Set up. Maybe the brackets and calipers, but I'd for sure have to do something else for rotors and I doubt I'd get rotors that big in 8 lug.

Description​

Rear Disc Brake Rotor - fits: 1979-96 P-30 with 4 wheel disc brakes - 19.5" wheels and 10 lug holes

Rear rotor on the older RV chassis with 4 wheel disc brakes, 19.5" wheels and 10 lug holes

Specifications

• Brake Rotor Casting Type: Solid
• Brake Rotor Diameter, Outer: 13.745 in / 349.123 mm
• Brake Rotor Thickness, Discard: 1.465 in / 37.211 mm
• Brake Rotor Thickness, Nominal: 1.535 in / 38.989 mm
• Center Hole Diameter, Minimum: 5.500 in / 139.700 mm
• Height, Overall: 4.365 in / 110.871 mm
• Surface Finish: Plain
• Packaged Weight: 34.5000 lb

Complete Vehicle List

Chevrolet P30 - 1979-1996 Rear
Chevrolet RV Chassis - Rear
GMC P3500 - 1979-1996 Rear
Workhorse Custom Chassis - P32 - 2000; 2002-2003 Front
Workhorse P30 - 2000 Front, Rear
Workhorse P32 - 2000; 2002-2003 Front
Workhorse R32 - 2003 Front, Rear
Chevrolet C3500HD - 1991-1994 Rear
GMC C3500HD - 1991-1994 Rear
Chevrolet G30 - 1992-1993 Rear
GMC G3500 - 1992-1993 Rear

old school idea for parking brakes: hydraulic parking brake.
(cheap / nice for big weird things, and projects that just need a brake but are stuck without drums that can hold, and have not gotten air, or an automatic transmission to put into "park")

Will still make a nice bridge. Bummer on the wheels. It's still a 14 bolt full float though?

goldpack said:

old school idea for parking brakes: hydraulic parking brake.
(cheap / nice for big weird things, and projects that just need a brake but are stuck without drums that can hold, and have not gotten air, or an automatic transmission to put into "park")

Click to expand...

Legally, parking brake has to be mechanical. For temporary use, lots of trucks have MICOs which is a lever that holds the hydraulic pressure to the wheel.

HotRodPC said:

Well nevermind, what was I thinking. The 10 bolt lug pattern alone kills it for me to take this Rear Disk Set up. Maybe the brackets and calipers, but I'd for sure have to do something else for rotors and I doubt I'd get rotors that big in 8 lug.

Click to expand...

The P30 was also available in the 8x6.5 pattern so brakes are available. Frito-Lay trucks were the most common.

Bennyt said:

Legally, parking brake has to be mechanical. For temporary use, lots of trucks have MICOs which is a lever that holds the hydraulic pressure to the wheel.

Click to expand...

You'all in the dry states need some rust to fight:

save for anything that was having a state DOT commercial truck inspection where they are using and following a checklist as their work can be reviewed immediately by a state trooper inspector at a roadside check point (or after a wreck).
...I never had anyone check for a working parking brake. (last car I had inspected....I knew the parking brake was not working at all,...and every 1 ton and smaller truck with an automatic transmission that I have known, the basic rule is "do not touch that parking brake,..use will make it rust in place locked on")

goldpack said:

You'all in the dry states need some rust to fight:

save for anything that was having a state DOT commercial truck inspection where they are using and following a checklist as their work can be reviewed immediately by a state trooper inspector at a roadside check point (or after a wreck).
...I never had anyone check for a working parking brake. (last car I had inspected....I knew the parking brake was not working at all,...and every 1 ton and smaller truck with an automatic transmission that I have known, the basic rule is "do not touch that parking brake,..use will make it rust in place locked on")

Click to expand...

i totally understand. Ive had to unstick a few. I just wouldn't trust a hydraulic parking brake as pressure bleeds off eventually. And the hydraulic brake system is only designed for "momentary" loads and not designed to maintain pressure for extended periods.

Best option is to install mag wheels that you can put a stick through!

Bennyt said:

i totally understand. Ive had to unstick a few. I just wouldn't trust a hydraulic parking brake as pressure bleeds off eventually. And the hydraulic brake system is only designed for "momentary" loads and not designed to maintain pressure for extended periods.

Best option is to install mag wheels that you can put a stick through!

Click to expand...

yep,...put the hydraulic lock on, AND deploy the wheel chocks.
release hydraulic lock,...make sure in neutral (preferably with a safety handle), engage PTO, set engine speed.

goldpack said:

old school idea for parking brakes: hydraulic parking brake.
(cheap / nice for big weird things, and projects that just need a brake but are stuck without drums that can hold, and have not gotten air, or an automatic transmission to put into "park")

Click to expand...

What's cool, it appears I can take that brake drum and tailshaft off that transmssion, pull the rubber o ring off the output shaft, then bolt on my tailshaft and bolt on yoke off my C20 and run that Th475. I was thinking I'd have to pull it all apart and swap the output shaft. NOPE. The output shaft IS DIFFERENT BUT, it still works with the bolt on yoke of our trucks by removing the O ring on the output shaft and using our tailshaft housing. I really wished I could have used that tailshaft housing too. Instead of a bushing in the tailshaft, it's got an actual real big output bearing. About like an axle bearing. It's not little torrington bearing, it's a real bearing. It's to the support the weight of the big ass brake drum and park brake assembly to the driveshaft.

CountKrunk said:

Will still make a nice bridge. Bummer on the wheels. It's still a 14 bolt full float though?

Click to expand...

Yes, it appears to be a 14b full floater with a huge ass stabilizer bar. I may try to see if I can't get that fo fit on my pick up. Man would that ever stiffen it up in the rear end. The wheels I'll stll use cuz they fit the old 60's and 70's C50 and C60 trucks and buses that are OE 20 inch. Try finding 20 inch tires these days. Well,I have this C50 dump truck here my dad was going to scrap. I'll put the 19.5 wheels on it. It was strange, I was seeing a C60 post on FB and a guy was telling another guy, what you need to is find the elusive RV 10 bolt 19.5 wheels and when you ever do find them, you better grab them up QUICK and if someone knows they got, they won't be cheap, but get them. I'm thinking huh?? I happen to know a guy who has a set of those. But to bad, that guy has a 68 C50 so them wheels ain't leavin' until they're on the dump truck with new tires. DAD, gimme that credit card, 'bout to get your dump truck running again. I thought about maybe even seeing what it would be like to bolt this whole ass 14b FF into the dump truck. How cool would it be to chop that frame and put a bed on that truck. so the 14b FF might be good too. I doubt it'll happen but ...

Bennyt said:

Legally, parking brake has to be mechanical. For temporary use, lots of trucks have MICOs which is a lever that holds the hydraulic pressure to the wheel.

Click to expand...

Yep, MICO are cool. But you're right, And here we have cars that are all electric ACTUATED parking brake. It's still mechanical, but elecronically actuated. That's the difference and it's legal. If that car loses power, the park brake just stays locked. Ask me as a tow truck driver how I know. You ain't getting the park brake off without a jump box, ORRRR you can tear the interior of the car apart and somewhere you'll find a teather you can pull to release that POS park brake. But MICO is different and I love MICO, cuz it can be set to lock front brakes, or rear brakes, or all brakes. One of my buses has a handicap lift, OH BTW, MICO does also make electronic instead of the lever which is still electrical too, but my bus, open that handicap lift door, I thought, WTF did the brake lights just come to the bus.. I had the door open and tried to pull the bus forward and it wouldn't move. I thought WTF is wrong with this BISH. Well OK, so there's a safety MICO brake on the bus. The second that handicap door lift opens, the MICO brake is applied and the rear brake lights come on the bus. To get it to release, just shut the door, and push the brake pedal down hard, you'll feel it release in the pedal and you're off the races in a school bus. hahaha, and yes it has the manual driveshaft brake too on the back of the Allison 2500. But, on the MICO, if the battery goes dead, the MICO would release and bus take off rolling. Well it won't cuz it has a hand brake too, but the MICO is no longer activated. OH, and I'll add, the MICO has it's own master cylinder too right next to the main master. DOT 3 fluid in the bus OE master, DOT 5 fluid in the MICO master.

goldpack said:

yep,...put the hydraulic lock on, AND deploy the wheel chocks.
release hydraulic lock,...make sure in neutral (preferably with a safety handle), engage PTO, set engine speed.

Click to expand...

We did put a MICO on one of the wreckers way back. This damn StupidDuty Ford truck with 7.3 and manual transmission, had the driveshaft park brake. Some bolts sheered off back there, and we never had time to fix it and bossman checked on parts and it was not cheap to fix. I want to say like $600 for everything we'd have to replace to fix that drum brake. So bossman cut a stick to put between the seat and brake pedal and that was our park brake, while I've got the rpm idled up and PTO engaged on a manual trans in N truck that weighed plenty and then hooking up to a car or truck that weighed more, and I'm on a slope on the freeway hooking a car with that bull$h1t ass stick protecting my life or a serious rollaway accident. That was my last tow in that truck. I took it to bossman and I said, gimme my phukin rollback back and shove this POS up your ass, I'm not driving it anymore. Phukin redneck azz BS wooden stick for a park brake? Hell NO. This isn't professional and damn sure not safe. You can at least put a MICO brake on the truck so we can them drop some wheel chocks. He's all about, Well, then WTH is a MICO brake? I asked, you really don't know? No I don't what is it? I said it's a 2x4 about 4 foot long, and get a long bolt and mount it to the side of the truck. So when you reach out the window,, you pull that 2x4, it hits the rear tire and now the truck won't move. PFFFT, LMAO !!! He was like HUH? Cuz I was pist at first, I wasn't in no joking mood, but when he asked like he was really concerned, I came up with the 2x4 BS. So after I couldn't hold the laugh back anymore, I told him what a mico brake is. Found on construction equipment usually, but some safety devices on vehicles too and if you dont' want to fix the drum driveshaft brake, it works like having a monkey in the truck holding their foot on the brake pedal. I took off in the my rollback, did several tows that day and when I got back to the yard to turn in paperwork and money, he was just finishing up and test the MICO brake he went and bought and put on the truck. I was actually proud of that cheap Phuk that day. He thanked me for the idea and said he had no idea of such a thing and it was only $225 for the kit he bought. Easy to install, and far cheaper than the $600 to fiz the driveshaft brake. I did tell him now you know I feel safe as hell with this, but IT IS NOT LEGAL. So I had to explain why blah blah blah, and he said, we'll use this in conjuction with our landscape timber cut offs we use for blocking in the tow bidness to chock the wheels as a secondary. I said good enough. I'll drive it now, Thank You, Sorry for an azzhole but that wasn't safe at all before. So it was alll good. I kept my job and didn't quit or get fired. MICO saved the day.

Bennyt said:

The P30 was also available in the 8x6.5 pattern so brakes are available. Frito-Lay trucks were the most common.

Click to expand...

No doubt, and MOST RV's too. It's a bit rare to see RV's with this 10 bolt 19.5 set up but there are some. This happen to be a top of the line RV in its day. Winnebago WindCruiser. Sad to see the inside cuz man it WAS a nice one. It wasn't paper thin crap, I mean it was but was done right, and I know EXACTLY how it's made now that I've been tearing it apart salvagine all kinds of parts, tanks, windows and hardware, and trashing the rest. this is an aluminum frame structure welded and bolted together and them BOLTED to the P30 frame rails.

you know if you leave the roof on that,...you could have a "covered bridge", with railings.