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03-01-2019, 08:49 AM | #21 |
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Re: Best lubrication for transmission ?
Lucas oil stabilizer makes a huge difference in how the transmission feels. Gives the gearshift a silky smooth feel. Night and day difference over 600w. Several years ago I changed out the transmission fluid with new 600w, didnt feel any difference over the old goo that had been in there for who knows how long. Ran it for a while but then tried lucas. Amazing difference.
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03-01-2019, 09:17 AM | #22 |
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Re: Best lubrication for transmission ?
It would be interesting to see what the viscosity of the off the shelf 600w is at operating temperature.I do know foaming in an issue.STP and other additives are not tested for pressure,in other words,even though its thick it might not handle the tooth on tooth contact pressure of engaged gears under load,possibly ending up with accelerated wear.That's where the API designation is critical,it tells you,by testing, how the oil handles the actual condition its under,way more scientific than looking at it and approving it by how thick it is.
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03-01-2019, 12:11 PM | #23 |
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Re: Best lubrication for transmission ?
Straight 90-or 140-W has served us well for YEARS & YEARS!!! CASE CLOSED!
Bill W.
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03-01-2019, 12:24 PM | #24 |
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Re: Best lubrication for transmission ?
Muskets served us well till the rifled barrel was developed...grasping new technology and understanding its value helps keep the car alive.
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03-01-2019, 04:17 PM | #25 | |
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Re: Best lubrication for transmission ?
Quote:
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03-02-2019, 07:43 AM | #26 |
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Re: Best lubrication for transmission ?
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03-02-2019, 08:08 AM | #27 |
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Re: Best lubrication for transmission ?
Absolutely correct about lubrication needs for modern helical gears are very different than lubrication needs for spur gears. (Apples and Oranges)
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03-02-2019, 03:10 PM | #28 |
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Re: Best lubrication for transmission ?
Except for the 2 bronze thrust washers in the 1928 transmissions and reverse idler gear brass bushing used all years, there is no brass/bronze to worry about in the stock A transmission or rear end.
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03-02-2019, 04:55 PM | #29 |
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Re: Best lubrication for transmission ?
Replace those thrust washers with hardened steel ones and you'd be fine with an EP oil but I still wouldn't do it. I think the thinner oil would make changing more difficult.
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03-03-2019, 02:47 AM | #30 |
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Re: Best lubrication for transmission ?
Petroleum Services Company (no business relationship to me) offer 600W oil in five gallon pails for a bit over $100. I've bought one, and if I use it all, I will be grateful for my own longevity.
https://petroleumservicecompany.com/...xoC2iwQAvD_BwE |
03-03-2019, 09:54 AM | #31 |
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Re: Best lubrication for transmission ?
Lubri-plate SPO-288 is really a great product for the transmission.
Brian |
03-03-2019, 11:13 AM | #32 |
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Re: Best lubrication for transmission ?
I've heard this rumor for years, so a number of years ago, for an experiment, I put a bronze synchronizer ring in a glass jar w/90-140 gear oil and let it sit for a couple of years and nothing happened to either the ring or the oil.
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03-03-2019, 01:03 PM | #33 |
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Re: Best lubrication for transmission ?
Noting will happen just sitting in a jar. What happens is, the additives bind at the molecular level with the brass and as the steel parts rub they are sheered off taking the brass with them.
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03-03-2019, 01:32 PM | #34 |
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Re: Best lubrication for transmission ?
Getting down to the molecular level,synthetic blends have consistent molecule size,where 'dinosaur' oil the molecule size is random.This basic difference is what makes synthetic oils superior to dino oils,chaining viscosity modifiers and load additives to synthetic oils is precise,leading to less 'oil breakdown',the breakdown of the additives bind to the molecule. That,plus the lower friction associated with consistent sized molecules is why synthetic oils are superior.
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03-04-2019, 01:01 AM | #35 |
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Re: Best lubrication for transmission ?
I am working on a 1930 AA truck. The differential has a brass thrust plate that the ring gear pushes against to prevent the ring gear from wobbling in the case when it’s torqued up under a heavy load. Also, depending upon what parts are available, there are spiders gears for these trucks that use 4 bronze shims under the pinions. (BB parts, suitable for use) The AA four speed uses a bronze bushing on the reverse idler gear. This is why I am avoiding lubricants that attack yellow metals.
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03-04-2019, 08:56 AM | #36 | |
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Re: Best lubrication for transmission ?
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03-04-2019, 11:24 AM | #37 |
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Re: Best lubrication for transmission ?
How do you know a certain lubricant has additives that will attack yellow metals?
I found the Copper Strip ASTMD130,3hrs@ 100oC for the gear oil I am using to be 1B which is light tarnish. It took a lot of digging to find it . It’s not somthing you find when you go shopping at Autozone for gear oil. |
03-04-2019, 11:29 PM | #38 |
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Re: Best lubrication for transmission ?
I bought a gallon of GL-1 from NAPA. They had to order it, but had it in 3 hours.
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03-06-2019, 07:36 AM | #39 |
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Re: Best lubrication for transmission ?
SO, with the WRONG Gear Oil, it'll wear the bronze bushings in only 37 YEARS---LOL
Bill Deadallready
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03-07-2019, 09:13 AM | #40 |
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Re: Best lubrication for transmission ?
The GL-5 issue is with bronze synchronizers.The merits of high pressure high load GL-5 far outweigh the potential issue,which is non existent in a model a.Current GL-5 has been buffered to eliminate this rare issue..but hey,I use modern sealants and engine oils too..
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