I am a relatively new owner of a 1915 Speedster. (the green one in the picture) I've been driving it quite a bit and loving it. I bought it pretty much as is from an estate so I don't know a lot of the history.
Current question is on rear end lubrication. I know the original oil is really thick but, when I dip my finger in there, it comes out covered with something that looks and feels a lot more like grease than oil. Also, the level is below the fill hole. (Fill hole is below centerline, which I understand may mean it is not 1915 but no matter - I bought it to drive, not win concours points!)
What SHOULD be in there? What should I do with what I have? I hate to think that I'd have to tear it all apart to clean out whatever is in there.
600 weight originally, I run 50/50 lucas and 85/90. KB
you can run 100% lucas HD engine oil addative. If you want to thicken it up you can cut it 50/50 with lucas's gear oil. many people swear by 600w. I cant compare the two as i have not used both. Either one will likely give you good results.
Chris, I have several 15/16 rear ends with the filler plug lower than the centre line, best way of telling if you have the right one is that the 15/16 has no ribbings on the out side of the brake backing plate.
Chris-- FWIW--I experienced the same thing when checking my newly acquired '20 Runabout last year. Thought OMG....this is "wore out crap"...well, I needed to take the rear end apart anyway to check on and yes, replace the babbit thrush washers, this stuff was like a grease, I'm assuming it was the "real" 600 weight stuff. Very good lube product actually, but of course, I scraped it all out for the rebuild anyway. After it was all back together, I bought the so-called 600W oil from Snyders, and use it in all my rear ends now. It's made for the Model T, and to be closest to the "old" 600W. You should probably open up your rear end also and check for those thrust washers. If they're babbit, they should be replaced with the bronze, whether they need it or not at that point.
I use SAE 140, with no problems. Most auto parts store should have it, If not, I think you can get it from Fun Projects.
I scraped some out of there last night and took a closer look. It looks quite a bit like CV joint grease. The gears appear to be well coated so there's probably no reason to panic. Sounds like a good winter project - to take that apart, check the washers, and re-lube. This weekend it looks like I get to reline the transmission bands.
Great looking speedster(s) Chris. There are a few regular NH posters here. Former Manchester resident here, birth till 04. Got tired of 7 months of winter :-)
Welcome to the hobby!