hooligan750

Hello

I have searched but have not found info on running without an LSPV.

Ive purchased an 84 pickup with a 4 inch allpro and 33's its a bit of a project the previous owner was mid EFI conversion so im finishing that. they also did an updated 4 runner rearend ( wider, Bigger drums) The LSPV is missing and as far as i see the rod is just one more thing to get caught on rocks. My question is can i run the system without the valve. what about a manual prop valve?

Thanks

red97taco

I know it's not an 84, but I removed mine and added a manual prop valve on my 97 tacoma.

This site helped me out alot http://www.off-road.com/trucks4x4/ar....jsp?id=186295

My truck is a daily driver, and I have not had a problem running the manual valve.
The only reason you might have a problem with it, is if you tow anything.
I have not towed anything with mine since i removed the LSPV

You cannot run a straight line to the rear, because it will lockup. Your rear only does(correct me if I'm wrong) 20-30% of the braking.

So, you can remove it, but you need to put a manual prop valve in the system.

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97 Tacoma, 3.4
6.5in lift, locked front+rear, NEW 33x12.5R15 KM2's

My Yota Tech photo gallery http://yotatech.com/gallery/showgall...0&ppuser=33148

ocdropzone

here is a thread from Pirate on the LSPV that also has some good information
http://www.pirate4x4.com/forum/showthread.php?t=489391

another one:
http://www.4x4spot.com/proportioning.htm

glad that you asked about this, it reminded me that i needed to get off my butt and do something about mine...

__________________
~Robb
'81 Trekker SR5 B4Runner Build
'89 Tercel Project POS Gas Saver

TREKKER Forum
LINK TO ONLINE FACTORY SERVICE MANUALS
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Wheel Responsibly, Don't screw it up for others...

drew303

If you run without it your asking for a wreck.

Search Disc Brake Conversion or click on the link in my signature and scroll down and find the link to my disc brake conversion thread... go to it, then link to elvotas writeup to find the part # for the manual LSPV from summit racing.

either get another stocker LSPV or get the manual, dont run without, you put yourself and everyone on the road in danger of becoming another statistic. Bottom line its plain out right stupid.

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1987 Toyota P/U 4x4 pics/info

ocdropzone

doesn't putting in the proportioning valve (properly adjusted) negate the need for the LSPV?

I am thinking that with the amount of lift and flex I expect from the new rear suspension i will install on my '81 that that LSPV rod will not work correctly or be long enough..

I am at work right now on break, but I will take a closer look at your thread (and Elvota's) when I get home...quick glances it looks like a good read..

__________________
~Robb
'81 Trekker SR5 B4Runner Build
'89 Tercel Project POS Gas Saver

TREKKER Forum
LINK TO ONLINE FACTORY SERVICE MANUALS
All Toyota Website Search Engine

Wheel Responsibly, Don't screw it up for others...

AZ4ME

LSPV is a proportioning valve (Load Sensing Proportioning Valve). By switching to the manual PV, you are swaping one for the other.

__________________
-Brian
'88 4Runner
'00 4Runner

abecedarian

as an alternate to elliminating the valve (way bad idea) or installing a manual lspv (better idea), you could extend the bracket on the axle that the rod connects to according to how much of a lift there is.

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hooligan750

i Pretty much figured running with nothihng wouldnt work i more wanted some input on the manual valve with as soft as my rear springs are i dont think i will be towing anything. so i think im going with the manual set up.
Thanks for the input