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billt460, that's a great suggestion. I am encouraged to read "clinging" in the description of that oil. Thank you.

I thought the same thing. But if it leaks because it's clean, I think that suggests the transmissions of thousands of new vehicles would have been leaking "back in the day." The Chevrolet transmission design was updated in 54 to include an input shaft seal. The transmission in the Plymouth...

I'm wondering if there's a possibility that gear oil from before the '50s might have been tackier than today's oil. Here's why. I have two antique vehicles built without transmission input shaft seals. One is a 36 Plymouth and the other is a '57 Chevrolet truck. After operating the vehicles...

I have used the Lubriplate.

I am searching for a satisfactory replacement for "water pump grease" as used in 20's and 30's vehicles. There are some recommendations here and here. As suggested, Lubriplate 115 "Water Pump Grease" is not usable as the heat causes it to soften and work out of the pump allowing coolant to leak...

Thanks Fleetmon. Most of the centrifuge literature today reports they won't remove additives, and some oil company information agrees. I guess things change with time but it's still worth looking into. Is this in the wrong forum for the deep tech guys to see it?

I'm working on removing soot from used diesel oil. I have a small centrifuge which will remove a fair amount of soot but eventually the amount of time required increases while the amount of soot removed per time decreases and it's not worth additional effort. I'm currently learning about the...

I've been a mechanic for 20+ years and I've seen some ridiculous things happen when it comes to companies backing warrantees. If you want to switch to a synthetic oil with longer drain intervals then I'd recommend getting written approval from the engine rebuilder first. Although you shouldn't...

I'm still keeping an open mind. There's obviously enough demand for an aftermarket fix but as mentioned there are plenty of transmissions without the fix that don't exhibit these symptoms. I may never know the problem with the truck trans but I will be able to report if using modern 140 wt oil...

Zaedock, thanks for taking the time. I cut my teeth on '55-57 Chevy trucks when Reagan was being elected and I've never seen one of these trans from those vehicles with a front seal. My '57 manual's trans section is an exact copy of the '55 manual online and the trans itself matches the...

Zaedock, this is a 57 unit. Date code matches manufacture date of truck. It's an SM420. It does not have a front seal. Input shaft disassembly with oil slinger is described in '55 Chevy truck manual below. The scanned image is almost clear enough to make out the worm gear for the oil...

Zaedock, this is a 57 unit. Date code matches manufacture date of truck. It's an SM420. It does not have a front seal. Input shaft disassembly with oil slinger is described in '55 Chevy truck manual below. The scanned image is almost clear enough to make out the worm gear for the oil...

Quote: I'd be looking at crankcase pressures. That's a good suggestion. I've cleaned the vent (which seemed to be free anyway), installed a larger tube, attached a hose and moved the end of the vent to a couple of different locations without success. Quote: Is it possible to modify the...

Preamble: In 1992 I bought a '57 Chevy pickup which had been off the road for many, many years. I serviced the original trans with fresh gear lube before the truck went back on the road and drove it all over Montana and even on an 8hr trip to Nebraska for many years without troubles. Driving the...

Quote: Try to not make a practice out of mixing them though. I think a lot of these places re-use the oil as heating oil or a third party buys it for re-processing. I'm not the generator. I'm on the receiving end of this.

Is there an easy way to detect the presence of brake fluid in waste oil? With clean fluids it's easy to see a separation layer but a visual check in dirty oil doesn't seem as easy. And I seem to recall seeing "lumps" in the bottom of a waste oil bucket after brake fluid was mixed in, rather than...