1992 transmission
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5th Wheeling
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1992 transmission
I have a 1992 4x4 with a 4 speed manual transmission. it has atf in it now and my manual says that i should have 80w in it. is the atf going to ruin my transmission. the trans is very low geared. (1st granny gear)
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For normal use, ATF is a good choice in manual transmissions, as it is less viscous and wastes less power churning it around in there. Many vehicles came from the factory with ATF in their manual transmissions. I used it in 3 and 4 speeds as far back as 1960. Reason tells us that if ATF can provide proper lubrication in automatics, which contain gears, just as do manuals, AND considering that autos get considerably HOTTER than manuals, there should be little problem with it in manuals.
For extremely severe service, gear lubricants, such as GL-2, GL-3, or higher, are more able to resist the high pressures generated by gear teeth, without losing the protective film. Unless yer pulling stumps out constantly, I would not worry about ATF.
Just my opinion. impish
For extremely severe service, gear lubricants, such as GL-2, GL-3, or higher, are more able to resist the high pressures generated by gear teeth, without losing the protective film. Unless yer pulling stumps out constantly, I would not worry about ATF.
Just my opinion. impish
Fleet Mechanic
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From: New York
I think this is a somewhat "dangerous" statement to make in a universal way as you have. The spec'd fluid for any given transmission varies by the particular transmission in question; some spec gear lube, others ATF. Depending on the transmission, damage can occur if too thick or too thin a fluid is used.
And so, question #1 is, what transmission do you have? If it's original, and a F-150, it should be a M5R2; F-250 or higher, it's a ZF. Both are 5-speeds, hence the comment immediately above.
And so, question #1 is, what transmission do you have? If it's original, and a F-150, it should be a M5R2; F-250 or higher, it's a ZF. Both are 5-speeds, hence the comment immediately above.
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From: Greenville, NC
I think with the old 4 speeds you'd want a thicker oil than ATF. The NP435 in my 78 called for 50wt oil.
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Fleet Mechanic
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So back to the OP's original question, if indeed it is a 4-spped, it is highly likely that it's a T-18, which is spec'd for 50wt motor oil. Since you're unlikely to find that, 15W-40 will suffice (or so I've just read).
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Read more here... www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&ved=0CGAQ FjAD&url=http%3A%2F%2Fwww.novak-adapt.com%2Fknowledge%2Ft18_t19.htm&ei=GszMUMaPJpL W0gGVrIGgCQ&usg=AFQjCNFjvUEfXZQYVKYnlWGGfsmvlW5u2Q &bvm=bv.1355325884,d.dmQ
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From: Greenville, NC
Interesting. Using car-part.com as a guide, indeed it shows that the 4-speed T-18 was still available through '93. Anyone know why this was the case?
So back to the OP's original question, if indeed it is a 4-spped, it is highly likely that it's a T-18, which is spec'd for 50wt motor oil. Since you're unlikely to find that, 15W-40 will suffice (or so I've just read).
So back to the OP's original question, if indeed it is a 4-spped, it is highly likely that it's a T-18, which is spec'd for 50wt motor oil. Since you're unlikely to find that, 15W-40 will suffice (or so I've just read).
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For normal use, ATF is a good choice in manual transmissions, as it is less viscous and wastes less power churning it around in there. Many vehicles came from the factory with ATF in their manual transmissions. I used it in 3 and 4 speeds as far back as 1960. Reason tells us that if ATF can provide proper lubrication in automatics, which contain gears, just as do manuals, AND considering that autos get considerably HOTTER than manuals, there should be little problem with it in manuals.
For extremely severe service, gear lubricants, such as GL-2, GL-3, or higher, are more able to resist the high pressures generated by gear teeth, without losing the protective film. Unless yer pulling stumps out constantly, I would not worry about ATF.
Just my opinion. impish
For extremely severe service, gear lubricants, such as GL-2, GL-3, or higher, are more able to resist the high pressures generated by gear teeth, without losing the protective film. Unless yer pulling stumps out constantly, I would not worry about ATF.
Just my opinion. impish
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For doubting Thomas types:
My '93 Mustang Cobra model came from Ford with ATF in it's 5-speed. So did all the other 5.0L HO Mustangs I have owned.
Now, given that these are High Performance vehicles in which transmissions are subjected to harsh conditions, why did they not have heavier oil?
Yes, fluid in automatics is pumped under pressure, but NOT to the majority of bearings, and thrust surfaces, nor to the GEAR TEETH. It is the teeth I'm considering as the questionable lubricant application, as that is where the highest pressure metal-to-metal condition occurs.
impish
My '93 Mustang Cobra model came from Ford with ATF in it's 5-speed. So did all the other 5.0L HO Mustangs I have owned.
Now, given that these are High Performance vehicles in which transmissions are subjected to harsh conditions, why did they not have heavier oil?
Yes, fluid in automatics is pumped under pressure, but NOT to the majority of bearings, and thrust surfaces, nor to the GEAR TEETH. It is the teeth I'm considering as the questionable lubricant application, as that is where the highest pressure metal-to-metal condition occurs.
impish
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5th Wheeling
Joined: Sep 2011
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my manual says its a t-18 it should have 80w so i think i will change it. just wasnt sure if ATF was found to be superior in a manual transmission since 1992. i also have an annoying vibration and it is loud in the cab so maybe the thicker oil will solve that as well.
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For doubting Thomas types:
My '93 Mustang Cobra model came from Ford with ATF in it's 5-speed. So did all the other 5.0L HO Mustangs I have owned.
Now, given that these are High Performance vehicles in which transmissions are subjected to harsh conditions, why did they not have heavier oil?
Yes, fluid in automatics is pumped under pressure, but NOT to the majority of bearings, and thrust surfaces, nor to the GEAR TEETH. It is the teeth I'm considering as the questionable lubricant application, as that is where the highest pressure metal-to-metal condition occurs.
impish
My '93 Mustang Cobra model came from Ford with ATF in it's 5-speed. So did all the other 5.0L HO Mustangs I have owned.
Now, given that these are High Performance vehicles in which transmissions are subjected to harsh conditions, why did they not have heavier oil?
Yes, fluid in automatics is pumped under pressure, but NOT to the majority of bearings, and thrust surfaces, nor to the GEAR TEETH. It is the teeth I'm considering as the questionable lubricant application, as that is where the highest pressure metal-to-metal condition occurs.
impish
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