For all you guys that shared your knowlegde!

[91W350]

Thanks!



My W350 had low oil pressure and the light would come on at when braking against the engine or very slow pulling in any gear. Searching the forums for oil pressure problems, several had posted about the pressure switch. I bought the truck knowing the gauge read much lower than my other two, if I had to I was going to pull the engine out of my 2 wheel drive 91, glad I did not have to! There was no engine noise or blue smoke, so I suspected there would be a gauge error. A pressure switch patched it right up. The three engines run so close to identical, it is hard to believe.



My volt meter on the W350 always read low, I took the cluster out and cleaned up the ground wire, just like magic! This site is better than any manual I ever saw.



Thanks all, for your exploration and willingness to share. Oo. Oo. Glen Oo. Oo.

 

[Dual EE]

I 2nd that!

The $35 is pennies to what we save instead of going to the dealer. I consider TDR one of the better mods I have bought for my truck.

 

[pepecat]

where is the pressure switch? I recently have been seeing lower indicated oil pressure but no indication for it to be an accurate reading

 

[91W350]

where is the pressure switch? I recently have been seeing lower indicated oil pressure but no indication for it to be an accurate reading

It is right behind the power steering pump, I think I used an 1 1/16 wrench and it costs 12 dollars at Auto Zone. It corrected the gauge and shut off the light both. A bargain, in my humble opinion. I was surprised they had it. The switch is a dual terminal, I suspect they use the same diaphram for both functions. Glen