Adding STP to gear oil

farmallhfan · Oct 11, 2009

A few years back I was collecting and restoring Economy, Jim Dandy, Power King tractors. The 80's models more common known as plastic tractors they had a gear clash problem. To solve the problem they came up with an additive which turned out to be STP oil treatment. Slowed the gears down faster when clutch was pushed in so you had no clash. My question is this has anyone ever heard of adding it to a farmall A transmission to stop gear clash? And woul the bearings still oil alright?

Jeff Z. · Oct 11, 2009

Lucas might also work.
Lucas

randy hall · Oct 11, 2009

if you want thicker oil why not use 140 weight in the first place. that's what i do.

Jeff Z. · Oct 11, 2009

85w-140 would be the best choice for summer/winter use.

Red Dave · Oct 11, 2009

I've used STP in gear cases and in my Farmall transmission and final drives. Never had any problems with doing it.

Works just fine. All it does is thicken it up a little.

IH fan · Oct 11, 2009

Should reduce friction as long as it doesn't get hot... and since friction causes heat, it should not get as hot. I wouldn't count on it curing anything that is already wrong with the transmission gears, bearings or seals.
That said, it should also not be necessary to add STP or anything else as long as the internals are in good shape and the correct lube is used.

Anonymous-0 · Oct 11, 2009

Snake oil is only good for the person selling it!

old · Oct 11, 2009

As long as no hyds are using that it would be ok but if it was me I would use grafit instead if does a better job

rustred · Oct 11, 2009

it gives the oil more viscosity and sticks to the gears better which is what you want in trans. and diffs. definitly wont hurt anything.thats why if you only put motor oil in your diff. in your truck it would just get hot and burn up because it dont have the proper additives to make it stick to the gears.

HENRY E NC · Oct 11, 2009

I use Lucas in the engine oil and also the gearcase. My A has hardly any gear lash. I credit the Lucas plus several hours adjusting the clutch and linkage. Henry

soybeanjoe · Oct 12, 2009

We use to use STP in all our engines & rearends & never had any problems with any of them. I quit using STP back in the mid '70s & had a rear end go out on a 1066. STP or coincidence? I have no idea.

The last couple years we have been using Lucas oi treatments in our semo rear ends &older engines. So far so good but that doesn't mean a thing.

Snake oil? Maybe, maybe not. Idoubt if there is anybody that can say positively whether it works or doesn't. It gives you peace of mind then use it. If not, don't

ryanwheelock · Oct 12, 2009

I won't use anything but Lucas as an additive. I've seen a few demosations on how Lucas mixed in with your normal gear oil sticks to the gears better than just plain gear oil. Was a good marketing pitch. Got me hooked.

rustred · Oct 12, 2009

snake oil is only an upper cyl. lubricant that you add to your fuel. yes, its good to use.

M Diesel · Oct 12, 2009

Fix the clutch drag.

Then use just about any ordinary gear oil. It will work fine.

Those transmissions are lubricated by gears splashing oil around, and even have a slinger gear to help the process. This technique does not work well with thick oil and at a certain thickness it actually significantly under lubricates and accelerates wear. Obviously heavy loads hurt the most.

FYI, when starting an M it takes 10 to 30 seconds before oil fills the tray and reaches the shaft bearings. In the old TD crawlers, thick oil in the final drives will wipe out the pinion bearings in a fraction of their intended lifespan.

Adding STP to gear oil

farmallhfan

Member

Jeff Z.

Well-known Member

randy hall

Member

Jeff Z.

Well-known Member

Red Dave

Well-known Member

IH fan

Well-known Member

Anonymous-0

Well-known Member

old

Well-known Member

rustred

Well-known Member

HENRY E NC

Member

soybeanjoe

Member

ryanwheelock

Member

rustred

Well-known Member

M Diesel

Member

Similar threads