Home » Public Forums » GMCnet » rear wheel brakes
| rear wheel brakes [message #179157] |
Mon, 06 August 2012 06:23  |
skip2
Messages: 544
Registered: September 2011
Location: Winter Haven,FL (center o...
Karma: 3
|
Senior Member |
|
|
The PO had put disc the same size as the stock front on the middle wheels and removed the rear a drums altogether and the braking was fine till I got in some bad stuff at malfunction junction in Tampa,FL, aka I4/I275 interchange. I was told once that the rears don't really do to much other than lock up and slide. Would much be gained by putting disc on the rears, also or any other suggestions. Also, the proportioning valve bypass button has a strap on it, as I understand it, so that all brakes get equal force. Any thought or comments will, as usual, will be greatly appreciated.
Skip Hartline
74 Canyon Lands, FiTech,
3.7 FD LSD, Manny Tranny,
Springfield Distributor,
2001 Chevy Tracker Ragtop Towd
|
|
|
|
| Re: [GMCnet] rear wheel brakes [message #179159 is a reply to message #179157] |
Mon, 06 August 2012 06:48  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Skip,
You've described the brake configuration on my 23'. The only thing I've
ever gotten in return for using rear brakes is flat spotted tires -- the
thumping right rear tire in the latest set is a severe annoyance after my
latest attempt to use the smallest calipers available. Until I install a
reaction arm system, I won't even consider remounting calipers there.
Since the "proportioning valve" has NO proportioning function, the PO was
right to disable the combination valve's front brake hold-off function by
depressing the bypass button. Here's how and why I did mine years ago:
http://www.gmcmhphotos.com/photos/g3510-deciphering-the-combination-valve.html
or
http://goo.gl/Pq2bm
Your comment about "malfunction junction" arouses unsatisfied curiosity,
what happened?
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Mon, Aug 6, 2012 at 7:23 AM, Skip Hartline wrote:
>
>
> The PO had put disc the same size as the stock front on the middle wheels
> and removed the rear a drums altogether and the braking was fine till I got
> in some bad stuff at malfunction junction in Tampa,FL, aka I4/I275
> interchange. I was told once that the rears don't really do to much other
> than lock up and slide. Would much be gained by putting disc on the rears,
> also or any other suggestions. Also, the proportioning valve bypass button
> has a strap on it, as I understand it, so that all brakes get equal force.
> Any thought or comments will, as usual, will be greatly appreciated.
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: [GMCnet] rear wheel brakes [message #179167 is a reply to message #179159] |
Mon, 06 August 2012 08:05 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
|
Senior Member |
|
|
I have the same configuration on my 23 and 26.
- I tow all the time with no brakes on the toad
- no longer worry about loosing the rear brakes going down the Grapevine
- I have never slid my wheels
- use the OEM master cyl, ( because I use small calipers)
- use the one ton V-1 to improve the front.
IF IT AIN'T BROKE
DON'T FIX IT
you are doing great
gene
On Mon, Aug 6, 2012 at 4:48 AM, Ken Henderson <hend4800@bellsouth.net>wrote:
> Skip,
>
> You've described the brake configuration on my 23'. The only thing I've
> ever gotten in return for using rear brakes is flat spotted tires -- the
> thumping right rear tire in the latest set is a severe annoyance after my
> latest attempt to use the smallest calipers available. Until I install a
> reaction arm system, I won't even consider remounting calipers there.
>
> Since the "proportioning valve" has NO proportioning function, the PO was
> right to disable the combination valve's front brake hold-off function by
> depressing the bypass button. Here's how and why I did mine years ago:
>
> http://www.gmcmhphotos.com/photos/g3510-deciphering-the-combination-valve.html
> or
> http://goo.gl/Pq2bm
>
> Your comment about "malfunction junction" arouses unsatisfied curiosity,
> what happened?
>
> Ken H.
> Americus, GA
> '76 X-Birchaven w/Cad500/Howell EFI+ & EBL
> www.gmcwipersetc.com
>
>
> On Mon, Aug 6, 2012 at 7:23 AM, Skip Hartline wrote:
>
> >
> >
> > The PO had put disc the same size as the stock front on the middle wheels
> > and removed the rear a drums altogether and the braking was fine till I
> got
> > in some bad stuff at malfunction junction in Tampa,FL, aka I4/I275
> > interchange. I was told once that the rears don't really do to much other
> > than lock up and slide. Would much be gained by putting disc on the
> rears,
> > also or any other suggestions. Also, the proportioning valve bypass
> button
> > has a strap on it, as I understand it, so that all brakes get equal
> force.
> > Any thought or comments will, as usual, will be greatly appreciated.
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] rear wheel brakes [message #179170 is a reply to message #179159] |
Mon, 06 August 2012 08:17 |
skip2
Messages: 544
Registered: September 2011
Location: Winter Haven,FL (center o...
Karma: 3
|
Senior Member |
|
|
Ken
Basically a case of cranal/anal inversion. I've got the beast handling and running so good I forget it's not my suburban, it's at least twice as heavy and with not even half the brakes as the suburban and more accceleration. Very heavy, for no reason, traffic on a sunday afternoon. I should know better, I learned to drive their 40 years ago and after multiple attempts to fix that interchange it's still screwed up, can't wait till the GOP convention and all the nonlocals, I will be nowhere around there. Just alot of people stopping for no reason and me not allowing extra space for the vehicle underneath me. Just a few close calls. And I'm getting more and more of a late model Clint Eastwood attitude. Main reason I installed a 3rd brake light.
Skip
74 Canyon Lands, FiTech,
3.7 FD LSD, Manny Tranny,
Springfield Distributor,
2001 Chevy Tracker Ragtop Towd
[Updated on: Mon, 06 August 2012 08:18] Report message to a moderator |
|
|
|
| Re: [GMCnet] rear wheel brakes [message #179177 is a reply to message #179170] |
Mon, 06 August 2012 09:28 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
|
Senior Member |
|
|
Skip,
If you want very good, stop on a dime, better than your Suburban, brakes. Your only option is to go with the Chuck Aulgur Reaction Arm system. If you already have disc brakes on the center wheels, you are part way there. I'm sure Jim K. could customize a kit for you with all the components to install the complete set-up on all your wheels. This kit also uses a new brass proportioning valve that is set up for disc brakes.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
|
|
|
|
| Re: [GMCnet] rear wheel brakes [message #179182 is a reply to message #179177] |
Mon, 06 August 2012 09:47 |
skip2
Messages: 544
Registered: September 2011
Location: Winter Haven,FL (center o...
Karma: 3
|
Senior Member |
|
|
I do have the brass proportioning valve should it not have the bypass strap on it?
Skip
74 Canyon Lands, FiTech,
3.7 FD LSD, Manny Tranny,
Springfield Distributor,
2001 Chevy Tracker Ragtop Towd
|
|
|
|
| Re: [GMCnet] rear wheel brakes [message #179187 is a reply to message #179157] |
Mon, 06 August 2012 10:26 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
|
|
Skip,
When I purchased Double Trouble it had:
OEM disks and Caddy 80 mm calipers on the front
Caddy disks and Caddy 80 mm calipers on the middle
Caddy disks and Caddy 80 mm calipers on the rears
P-3 master cylinder
OEM booster
No combination valve
No parking brake
Auxiliary vacuum pump
I had to have my cousin in NJ register it for me for reasons to complicated to explain and NJ requires a hand brake so Ken Frey
removed the rear disks and installed drums. To get it to pass I adjusted the hand brake to within an inch of its life and drove the
couple of miles from my cousins to the inspection station and it passed.
Subsequent to this the following has been done:
P-3 master cylinder replaced due to leakage
Brake fluid replaced with ATE Dot 4 Super Blue
Booster replaced with sensitized unit from J. Bounds
Brake lines replaced with Classic Tube stainless steel (I recommend getting them from Tom Hampton of Grandview Motorhomes
Brass combination valve for drum brakes installed
All rubber hoses replaced with Teflon lined braided stainless steel
Front disks and calipers replaced - carbon metallic pads
Middle disks and calipers replaced - carbon metallic pads
Rear drums, wheel cylinders, spring kit - carbon metallic shoes
Dan Gregg drove my coach and he was blown away by how well it stops.
This setup has been in Double Trouble for around 10,000 miles and I'm very happy with the way the coach stops. I agree the reaction
arm system is superior, however, from the way this thing stops it's not worth the expense. YES I AGREE that some day I may need to
make a panic stop and the rear wheels will skid and I'll get clobbered or clobber someone!
Regards,
Rob M.
-----Original Message-----
From: Skip Hartline
The PO had put disc the same size as the stock front on the middle wheels and removed the rear a drums altogether and the braking
was fine till I got in some bad stuff at malfunction junction in Tampa,FL, aka I4/I275 interchange. I was told once that the rears
don't really do to much other than lock up and slide. Would much be gained by putting disc on the rears, also or any other
suggestions. Also, the proportioning valve bypass button has a strap on it, as I understand it, so that all brakes get equal force.
Any thought or comments will, as usual, will be greatly appreciated.
Skip Hartline
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
|
|
|
|
| Re: [GMCnet] rear wheel brakes [message #179221 is a reply to message #179157] |
Mon, 06 August 2012 13:24 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
|
Senior Member |
|
|
The WarPig has six wheel disc. When I shoot the rotors with a laser thermometer the rears are always warmer than the fronts after braking down a grade. I imagine that means they are doing something ;)
Sully
77 royale
Sent from my iPhone
On Aug 6, 2012, at 4:23 AM, Skip Hartline <skiphartline@aol.com> wrote:
>
>
> The PO had put disc the same size as the stock front on the middle wheels and removed the rear a drums altogether and the braking was fine till I got in some bad stuff at malfunction junction in Tampa,FL, aka I4/I275 interchange. I was told once that the rears don't really do to much other than lock up and slide. Would much be gained by putting disc on the rears, also or any other suggestions. Also, the proportioning valve bypass button has a strap on it, as I understand it, so that all brakes get equal force. Any thought or comments will, as usual, will be greatly appreciated.
> Skip Hartline
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
|
|
|
|
| Re: [GMCnet] rear wheel brakes [message #179409 is a reply to message #179159] |
Tue, 07 August 2012 14:37 |
skip2
Messages: 544
Registered: September 2011
Location: Winter Haven,FL (center o...
Karma: 3
|
Senior Member |
|
|
Ken H.
Now my curiosity is up, what is the grapevine and what do you have as a toad and do you know the weight?
Skip Hartline
74 Canyon Lands, FiTech,
3.7 FD LSD, Manny Tranny,
Springfield Distributor,
2001 Chevy Tracker Ragtop Towd
|
|
|
|
| Re: [GMCnet] rear wheel brakes [message #179444 is a reply to message #179409] |
Tue, 07 August 2012 18:25 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Skip,
Don't know how I got into a Grapevine discussion, but I have been up it a
few times: It's a steep stretch of I-5 from the San Joaquin valley up to
Tejon Pass in the Tehachapi mountains of California. Lots of folks claim
it's a taxing test of their vehicles' climbing ability. My GMC and '99
Honda CRV (travelling weight 3500#+) didn't think much of it the last time
we were out there.
Ken H.
On Tue, Aug 7, 2012 at 3:37 PM, Skip Hartline wrote:
>
>
> Ken H.
> Now my curiosity is up, what is the grapevine and what do you have as a
> toad and do you know the weight?
>
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
Goto Forum:
Current Time: Sun Oct 06 15:36:32 CDT 2024
Total time taken to generate the page: 0.01305 seconds
|
GMCforum
Search
Help
Register
Login
Home
