72 Wagoneer 86 Dodge W100 Axles/Brakes - Proportioning Valve

Modified FSJ Tech Area
Post Reply
User avatar

Topic author
turtlehead
Posts: 24
Joined: Mon Jan 09, 2017 2:16 pm
Location: Folsom, CA
Contact:

72 Wagoneer 86 Dodge W100 Axles/Brakes - Proportioning Valve

Post by turtlehead »

guys - I'm in a weird sport... guy who "built" my waggy did some weird stuff.

He snagged axles off of an 86 Dodge W100 (99.9% sure that's correct) - let's run with it.

He put in some weird weird weird brake booster and master cylinder combo

I'm trying to fix his "errors"

Got a booster and master combo that should work from a CJ (new from the parts store)

Guy at the parts store pointed out that the original builder used a 2wd Brake Proportioning Valve for an 86 D100
This has 2 front brake line outlets from the valve
the correct proportioning valve should only have 1 front brake line outlet

I can not for the life of me find the correct proportioning valve, and the nearest junkyard with a W100 is almost 2 hours away (don't wanna drive that far for this part)

Can anyone give advise on how much freedom I might take in sourcing a different proportioning valve?

The setup now is front disk, rear drum.

I see front disk and rear drum valves out there for jeeps - but don't know if they would end up working, causing trouble?

Do I source a totally different single outlet port valve - or maybe just run lines to run the two ports to my front brakes separately?

thanks a ton for any advice!
1972 Wagoneer
filthy mods by previous owner:
1986 Dodge W100 Axles
Random brake parts...
1967 Buick 340 engine
SOA swap with some questionable install parts
User avatar

Phils67
Posts: 1011
Joined: Sat Mar 24, 2018 3:11 pm

Re: 72 Wagoneer 86 Dodge W100 Axles/Brakes - Proportioning Valve

Post by Phils67 »

Sounds like the front just splits off at the proportioning valve instead of going to a junction block and splitting off to each wheel. I assume the setup the valve is for had a line to each front hose without a junction block further down the line to split it. I would just hook it up and see what happens. Don't overthink it too much. The fluid doesn't care where it splits off as long as it reaches its destination. Can you post a picture of what you have? That may help also
1967 Gladiator J2000, 1998 4.0L OBD2, T18, D20 twin sticks, D44HD/D60, Detroit lockers, 3.73s, 4wheel disc brake, FSSR, Dakota digital, etc.
User avatar

Topic author
turtlehead
Posts: 24
Joined: Mon Jan 09, 2017 2:16 pm
Location: Folsom, CA
Contact:

Re: 72 Wagoneer 86 Dodge W100 Axles/Brakes - Proportioning Valve

Post by turtlehead »

Here's some photos:

View of the front inlet and front outlet on top

Image

view of the two inlet brake lines coming in, as well as to the right the one front brake line going out to the front brakes (runs to a Y that splits later to the individual brakes)
Image

view showing how the original owner "crimped" off the bottom outlet port (one of the two front brake outlets)

Image

Outlet to rear brakes
Image
1972 Wagoneer
filthy mods by previous owner:
1986 Dodge W100 Axles
Random brake parts...
1967 Buick 340 engine
SOA swap with some questionable install parts
User avatar

tgreese
Posts: 7118
Joined: Fri Jun 08, 2012 6:31 am
Location: Medford MA USA

Re: 72 Wagoneer 86 Dodge W100 Axles/Brakes - Proportioning Valve

Post by tgreese »

Use that valve, send each front outlet to one wheel. Send the rear outlet to the rear. The two inlets on the top go to each cylinder of the master cylinder.

Shown clearly in the TSM - figure 9-9 here http://oljeep.com/gw/76_tsm/Section9.pdf
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 Chryco Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.
User avatar

Topic author
turtlehead
Posts: 24
Joined: Mon Jan 09, 2017 2:16 pm
Location: Folsom, CA
Contact:

Re: 72 Wagoneer 86 Dodge W100 Axles/Brakes - Proportioning Valve

Post by turtlehead »

Sounds good, so just run new brake lines direct from the proportioning valve to the front brakes.

I was told by someone that this was for a two wheel drive setup and it might not be a great fit for four wheel drive that way.

But... they also didn't seem totally positive of that
1972 Wagoneer
filthy mods by previous owner:
1986 Dodge W100 Axles
Random brake parts...
1967 Buick 340 engine
SOA swap with some questionable install parts
User avatar

tgreese
Posts: 7118
Joined: Fri Jun 08, 2012 6:31 am
Location: Medford MA USA

Re: 72 Wagoneer 86 Dodge W100 Axles/Brakes - Proportioning Valve

Post by tgreese »

Mmm. As opposed to the correct valve for your Wagoneer? I believe that advice was not well informed. That's a valve for front disks and rear drums. It'll work fine if it's not full of crud. These things are fairly generic - look at someplace like Inline Tube or even BJ's and you'll see new replacements.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 Chryco Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.
User avatar

Topic author
turtlehead
Posts: 24
Joined: Mon Jan 09, 2017 2:16 pm
Location: Folsom, CA
Contact:

Re: 72 Wagoneer 86 Dodge W100 Axles/Brakes - Proportioning Valve

Post by turtlehead »

tgreese wrote:Mmm. As opposed to the correct valve for your Wagoneer? I believe that advice was not well informed. That's a valve for front disks and rear drums. It'll work fine if it's not full of crud. These things are fairly generic - look at someplace like Inline Tube or even BJ's and you'll see new replacements.
Sorry, I probably wrote that without enough detail.

The axles/brakes are from an 86 Dodge W100 - so that advice I was getting was geared to providing parts for those axles/brakes vs. original gear that doesn't exist on my wagoneer now.

So, my understanding is, the correct valve for my wagoneer was a drum drum valve

But, I'm getting the feeling the best answer is run with this valve and run the two lines out to each front brake.

Thanks!
1972 Wagoneer
filthy mods by previous owner:
1986 Dodge W100 Axles
Random brake parts...
1967 Buick 340 engine
SOA swap with some questionable install parts
User avatar

dodgerammit
Posts: 1434
Joined: Wed Jan 11, 2017 11:20 pm
Location: Middle TN

Re: 72 Wagoneer 86 Dodge W100 Axles/Brakes - Proportioning Valve

Post by dodgerammit »

Hmmm. I'm guessing a disconnect Dana 44 front and 9 1/4" rear? I'd run the valve as others have said.

Too bad I no longer have my 85 W350. I'd snag some shots of the brake stuff for you if I did.
84 Grand Waggy-Radio Flyer (Garnet Red/3M Ebony Metallic woodgrain, with honey interior) AMC 360 :cry: 2004 4.8LS/Advance Adapter/727/242 D44/AMC20 Serehill tailgate and headlight harnesses :fsj: Ongoing thread-viewtopic.php?t=11897

92 Wrangler Islander 4.0/32RH/231 D30/D35 RHD
User avatar

tgreese
Posts: 7118
Joined: Fri Jun 08, 2012 6:31 am
Location: Medford MA USA

Re: 72 Wagoneer 86 Dodge W100 Axles/Brakes - Proportioning Valve

Post by tgreese »

Do you have the '72 TSM? The 1972 drum-drum brakes have no proportioning valve, so this could not have come from your Wagoneer. What I pointed to was the 1976 TSM, which is disk-drum like you are headed toward. I suggest you read that section.

This is a combination valve. I'm pretty sure it has 3 sections, and I'd assume it came from the donor Dodge. The proportioner section is only 1/3 of its function, and that prevents rear wheel lockup in severe braking. RTM.

A drum-drum valve has no metering section (the front section - see the CJ valve in the '76 TSM above). If this valve has no metering section, it should still work, but it did not necessarily come from the Dodge or your Jeep. Or, Dodge could have decided they don't need the metering section for this app. The Dodge definitely would have had a valve, likely the 3-section combination valve shown for the '76 Wagoneer. The metering section is at the front, and you have not given us a good view of that. If there is no metering section, you can use this valve or buy a new one like the '76 Wagoneer valve. http://www.bjsoffroad.com/DiscDrum-Prop ... p_264.html - Note this is a generic part, and available lots of places including the brake parts specialists, RockAuto, and eBay.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 Chryco Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.
User avatar

Topic author
turtlehead
Posts: 24
Joined: Mon Jan 09, 2017 2:16 pm
Location: Folsom, CA
Contact:

Re: 72 Wagoneer 86 Dodge W100 Axles/Brakes - Proportioning Valve

Post by turtlehead »

Thanks guys! This is perfect, looks like I have a valve that will work and just need to do some plumbing
1972 Wagoneer
filthy mods by previous owner:
1986 Dodge W100 Axles
Random brake parts...
1967 Buick 340 engine
SOA swap with some questionable install parts
Post Reply