Thread Tools Search this Thread Display Modes
Old 06-27-2003, 10:27 PM   #1
3 Rivet Member
mcneon's Avatar
Join Date: Jun 2003
Posts: 189
Images: 4
Rear disc brakes

I understand that the later P-30 chassis had rear disc brakes. This has to be a major improvement over the rear drum arrangement on my '74.

Has anyone tried or thought about retrofitting these later disc brakes to an earlier chassis? I figure the only way would be to find a complete rear axle and swap it in, then probably change the master cylinder, too. Anyone have any real-world experience and/or advice?

Bob McKeown

mcneon is offline   Reply With Quote
Old 06-28-2003, 05:23 AM   #2
Rivet Master
LOST , Hawaii
Join Date: Jun 2002
Posts: 2,193
You would also have to change the proportioning valve. I thought about it but decided the cost (and labor) to do it wouldn't be worth the improvement in braking. The rear axles aren't cheap. If you wanted to change gear ratios at the same time that would offset the cost.


74Argosy24MH is offline   Reply With Quote
Old 06-28-2003, 10:18 AM   #3
3 Rivet Member
mcneon's Avatar
Join Date: Jun 2003
Posts: 189
Images: 4
Okay, I admit it - I'm a glutton for punishment. Does anyone know what year models of P-30 chassis I'd need as a donor to do this swap? I assume the same year models of P-30 bread truck would work, too.

One additional question: did the front brakes stay the same when GM made the swap to rear discs?

mcneon is offline   Reply With Quote
Old 06-28-2003, 10:38 AM   #4
Rivet Master
LOST , Hawaii
Join Date: Jun 2002
Posts: 2,193
1979 for sure, and I think it was the first year. Sometimes there were contracts that crossed model years and you could find some spec'd with drums for later years or heavier GVWs.

Fronts should be the same after the changeover.

74Argosy24MH is offline   Reply With Quote
Old 09-09-2003, 11:32 AM   #5
1 Rivet Member
Join Date: Sep 2003
Posts: 12
Send a message via Yahoo to lido&linda 85/345
I have rear disc brakes on my 85 435.I was told its a p33 chassy.
I can't tell you if its better,its my first MH.Going down hill I still have to use the tag bakes.
lido&linda 85/345 is offline   Reply With Quote
Old 04-21-2004, 10:29 PM   #6
4 Rivet Member
alfalsetto's Avatar
1982 31' Airstream 310
Longview , Washington
Join Date: Sep 2002
Posts: 269
I have disc-brakes on the rears and My is a 1982.
alfalsetto is offline   Reply With Quote
Old 04-23-2004, 01:15 PM   #7
Rivet Master
ALANSD's Avatar

1966 26' Overlander
Woodstock , Georgia
Join Date: Feb 2002
Posts: 8,079
would the later brakes even fit or adapt to the 74? Mine has 19.5" wheels, and I know the older ones had smaller 16 or 17, does that indicate a different size hub and all or am I nuts.(it wouldn't be the first time)
1966 Overlander
AIR #005
Please visit our blogs and web pages:
ALANSD is offline   Reply With Quote
Old 04-26-2004, 09:58 PM   #8
2 Rivet Member
Join Date: Mar 2004
Posts: 38
disc brakes

Being as the front brakes do all the work I would think it would not be worth the effort. probably a different master cylinder as well. Could be a real nightmare.

moisheh is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
vacuum power disc brakes trumpwer Brakes & Brake Controllers 3 05-14-2009 07:38 PM
What is your Brake Controller of Choice? overlander64 Brakes & Brake Controllers 71 11-29-2008 08:40 AM
Z71 or Z85? River Rat Tow Vehicles 7 05-09-2003 04:40 PM
disc brakes overlander Brakes & Brake Controllers 10 01-25-2003 11:29 PM
Disc Brakes? J.Hemingway Brakes & Brake Controllers 2 08-22-2002 07:56 PM

Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:58 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.