dynamic73

I have a 94 toyota pickup extra cab 2WD. I bought new tires and put them on a set of rims from a 86 toyota pickup. Which are the alloy turbo stlye rims. The old rims were steel 14" and the alloys are 14".

Took it for a test drive and now the brakes are making a noise from the rear. When stopping from over 50 mph. The whole truck shakes and the bed moves up and down. You can feel a pulsation in the brake peddal. You can definately hear a noise coming from the rear.

I'm wondering if the brake bed height sensor got out of adjustment or something. I can't really figure out what went wrong. I took the rear drums off the truck. And there's no visable problem I can see inside. I also put the old tires and wheels back on the truck. And the problem is still there.

The truck drives fine except when you hit the brakes. Anyone seen anything like this before?

dynamic73

I also wondering if anyone has eliminated the bed height sensor from their truck. Looks like you can just plug it off with a anl fitting type cap. Wondering if there's any problems with eliminating this part.

jimbo74

my 4x2 is an 85 and does not have the lpsv you speak of... most i have seen do have it, even the same model year...m y truck works jsut fine without it....

as the 84-95 4x2s are mechanically identical, you probably could remove it without a problem

phorunninduke

I hear that it is perfectly safe to remove it, but I have not personally done it and have been under the general assumption that If toyota put it there they probably had a reason.

They can go bad, and have replaced them ( mostly due to leaks). I think it would be safe to cap it off and see it that solves the problem.

jimbo74

im not sure about trying to cap it off, i would rather make sure to get the proper junction block that jsut doest even have a provision for it other than use some type of bolt screwed into the fitting......

i guess its so the rear end doesnt lock up on hard brking when unloaded... i drive hard and mine has slighty locked up i nthe rear in all sorts of conditions, rain and dry, never has the rearend tried to whip out from the front though

dynamic73

Ok today I did a full rear brake job. New drums, shoes, and wheel cylinders. This did not solve the problem. Same as before except the rear shoes aren't making any noise now.

I've been a mechanic for 35 years now. I've never seen a problem like this. I don't think cars and trucks will ever ceast to amaze me.

This problem has me completely stumped. I can't understand why just changing the wheels would cause this. Nor can I understand what is even causing the problem. I don't even know where to look.

surf4runner

this probably would be obvious to you.
when i put alloys on my 92 there was a screw in the rear drum they had to remove as it didnt sit flat on the drum. didnt notice vibrations until 55mph. when i took it back the mgr at he shop knew exactly what it was. took it off and no more problems. never affected the brakes.

dynamic73

Yea I don't have any vibration when driving. My problem is when I hit the brake. I'm also wondering if it could be a U Joint going bad.