M37 steering and wander

[jmacqueen]

Well it isn't the front hubs, the noise remained after greasing them up, and even when they were engaged.

I drove the truck into work this morning though and I think I got it now.. I believe it's my speedometer head.. ;) or possibly the cable but I seriously doubt that,

That's about the only other rotating part I can think of thats in front of me and tied to rolling speed. And once it dawned on me it seemed real clear. The needle does have a bit of bounce as well, so I could probably grease the cable up as well. I left it alone because I thought I would likely replace it with an electronic Datcon or something later.

Question is how to lube it? It's one of the few parts I have not taken apart and done anything with on this truck, well not yet anyway..

[jmacqueen]

Yup was the speedo, squirted some cmotorcycle cable lube into the speedo head bushing and no more noise. I think I need to put something a bit more viscous there though.

[Charles Talbert]

Yup was the speedo, squirted some cmotorcycle cable lube into the speedo head bushing and no more noise. I think I need to put something a bit more viscous there though.

There is a product available at NAPA, called white lithium grease, comes in a small tube or a 1# tub, light weight enough to work without causing cable drag, yet viscous enough to hang on well. If you use a product that is too heavy, it will cause drag and needle jumping in cool temps. NLGI#2 gun grease is too heavy.

[jmacqueen]

Yeah I have a tube of white lithium grease on the shelf I use for some things, and several other types of lube..

I have been mulling over whether the lithium would be viscous enough for the job, and getting it down into what appears to just be a bushing without disassembling the speedo. I suppose a little air would move in in there.

I don't have much in between lithium and a light chassis grease though.

I think I'll give it a try. The speedo is going to get replaced eventually anyway so I have nothing to lose, it's not accurate now anyway with the 4.89 gears. I'm using a GPS for accurate speed.