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 Proportioning Valve
#864144
01/27/08 02:18 AM
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Joined: Jan 2008
Posts: 3
OP
Need a Spot
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I am fixing up an '87 Mighty Max 4x4 and working on the brakes. I need a new proportioning valve but the dealer cant help me find one. Does anyone have any ideas where I could get one? Does the montero have the same part?
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Re: Proportioning Valve
[Re: dbax]
#864145
01/27/08 03:45 AM
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Joined: Jan 2003
Posts: 1,741
Body Damage is Cool
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i had the same issue.only the 4x4 trucks have those valve's.i asume you are talking about the one in the back with the spring that hooks to the rear axle.about the only thing you can do is call junk yard to see if they have any 4x4 dodge d-50 or mitsu mighty max trucks.most of them will have no idea what part you are talking about so just see if they have a 4x4 truck then you can go there to pull it or show them.if you cant find one than post up here again.what area are you from?
87 dodge power ram 50,35" tires,5 1/2" total lift,4.6 gears,lockers front and rear,Rancho RS5000's,custom front bumper,custom rock sliders,cct extended diff breathers,75 amp alt(40 amp stock),thorely header,K&N,wheeled hard...
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Re: Proportioning Valve
[Re: powerRam50]
#864146
01/27/08 07:00 PM
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Joined: Mar 2007
Posts: 55
Getting the Wheeling Fever
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More info needed. <img src="/forums/images/graemlins/wink.gif" alt="" />
We have a Raider for parting out. No valve over the rear axle on the Montero/Raider.
Bonnie - 1989 Montero LS 4-door, black, loaded, sunroof, dual bouncies, 31" BFGs
Clyde - 1989 Montero LS 4-door, black, loaded, alloys, stock
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Re: Proportioning Valve
[Re: Witsubishi]
#864147
01/27/08 08:38 PM
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Joined: Jan 2003
Posts: 1,741
Body Damage is Cool
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exactly monty's don't have it only trucks.it ads more rear brake bias as more lb's are added to the back.kind of a cheap anti lock in a way.the more weight in the back the more it lets the rear brakes work because there is less of a chance of lock up.montys don't have it because you generally wont put as much in the back as a truck.
87 dodge power ram 50,35" tires,5 1/2" total lift,4.6 gears,lockers front and rear,Rancho RS5000's,custom front bumper,custom rock sliders,cct extended diff breathers,75 amp alt(40 amp stock),thorely header,K&N,wheeled hard...
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Re: Proportioning Valve
[Re: Witsubishi]
#864148
01/27/08 08:46 PM
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Joined: May 2007
Posts: 435
Mudrunner
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It's a load sensing valve. When the truck bed is empty and the brakes are applied hard, the bed tends to rise. The valve senses this via the spring, and decreases the brake line pressure to the rear brakes to avoid lockup. With a big load in the back, the bed stays level under heavy braking, so the brake line pressure can be higher to provide more braking power without lockup. P/N MB587293, about $300 at the stealer. <img src="/forums/images/graemlins/scared.gif" alt="" /> Spend some time in the yards, mate!
1990 Monty LS 3.0 A/T LWB. KYB front shocks, OME rears and coils. 33x10.5 BFG Muds. 5.29, 2.85, RD110, RD46. 2 bouncys. Aisins. Monte Disco swaybar disconnects. GenII t-arms, idler arm, UCA's, V45W front brakes. 2in BL.
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Re: Proportioning Valve
[Re: dbax]
#864149
01/30/08 01:14 AM
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Joined: Jul 2003
Posts: 850
Rock Warrior
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I am fixing up an '87 Mighty Max 4x4 and working on the brakes. I need a new proportioning valve but the dealer cant help me find one. Does anyone have any ideas where I could get one? Does the montero have the same part? Have you checked to see if one off a Toyota pickup will work? Edward
'97 Montero Sport LS 5-Speed 3.5L conversion
SAS Dana 44s & ARBs, 35" Yoko Geolandar M/Ts
NP231 B4R doubler/Terra Low231/RP 5.38 229:1
'99 Montero Sport Limited 4WD SAS 3-link project
'03 Montero Sport Limited AWD
'97 Montero Sport LS 5-Speed 4WD
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Re: Proportioning Valve
[Re: dbax]
#864150
01/30/08 02:36 AM
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Joined: Jan 2008
Posts: 3
OP
Need a Spot
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Thanks for the help, I have been scouring junkyard. I will get one eventually.
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Re: Proportioning Valve
[Re: dbax]
#864151
01/30/08 04:46 AM
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Joined: Jun 2003
Posts: 7,356
Trail Leader
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Gen II Monties have them. No idea if they proportion the same as the p/u.
Big Truck: 00, 3.5, Endeavor, 5-Spd drive line in hand! Little Truck: 87, 2.6T I/C, MT, LSDs, Tonneau Top Her Truck: 03, 3.8, 20th Anniv, 65k Daughter's: 06 Eclipse, Keeping it Mitsu! FSMs: MitsubishiLinks.com
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Re: Proportioning Valve
[Re: MontyMcV]
#864152
01/30/08 05:06 AM
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Joined: May 2007
Posts: 435
Mudrunner
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Probably not since one has disks and other has drums. P/N's of the valves are different. Interesting idea though (visions of a Gen2 rear end on a Max).
1990 Monty LS 3.0 A/T LWB. KYB front shocks, OME rears and coils. 33x10.5 BFG Muds. 5.29, 2.85, RD110, RD46. 2 bouncys. Aisins. Monte Disco swaybar disconnects. GenII t-arms, idler arm, UCA's, V45W front brakes. 2in BL.
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Re: Proportioning Valve
[Re: DirtDriver]
#864153
01/30/08 06:54 AM
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Joined: Jun 2003
Posts: 7,356
Trail Leader
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Makes sense. I don't even know, admittedly, is the p/u leaf sprung? (I'd guess so.) If it is, maybe the Montero Sport has one? Maybe get a whole locking rear attached to the valve?
Big Truck: 00, 3.5, Endeavor, 5-Spd drive line in hand! Little Truck: 87, 2.6T I/C, MT, LSDs, Tonneau Top Her Truck: 03, 3.8, 20th Anniv, 65k Daughter's: 06 Eclipse, Keeping it Mitsu! FSMs: MitsubishiLinks.com
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