The Ford Barn

31 ford · 11-05-2023, 11:21 PM

I will be changing the fluid in the differential and transmission soon . After I drain those fluids ,is it safe to flush the differential and transmission with 1-K Heater fuel kerosene before re-filling with 600w . Klean strip is the brand available in my area. Will this kerosene be safe and not harm the bearings and gears ? I'm only asking because earlier I read a post stating to flush those components with kerosene to remove any sludge . Thank you .

GeneBob · 11-05-2023, 11:35 PM

Why not just change the oil and let the new oil clean the innards? If you are worried about sludge, change the oil a second time after a thousand miles to see how it looks. Fresh oil provides better lube quality than old worn oil that has been sheared and broken down. Let sleeping sludge be.

Oldbluoval · 11-06-2023, 12:57 AM

31 -
I think it’s ok. Just let it drip out well .

Ordsgt · 11-06-2023, 07:10 AM

If you go the kerosene route make sure you do not drain and let it sit too long. Kerosene will remove ALL traces of oil from everything and the oxidation (RUST) process will immediately start

alexiskai · 11-06-2023, 07:26 AM

I’ve done a kerosene flush for the transmission and it worked fine. It won’t hurt the gears just being in there for a few minutes. You’re supposed to rock the car or rotate the wheels to churn it. But as stated above, you should refill with oil promptly.

nkaminar · 11-06-2023, 07:36 AM

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How dirty is the old oil? If it is fairly clean then just change it. If it is really dirty then you can clean it out with kerosene or other solvent. Then it becomes a problem of how to get rid of the dirty kerosene.

WHN · 11-06-2023, 08:04 AM

Why!

If your transmission is that dirty? Maybe it needs to be removed, taken apart, and check if a rebuild is needed.

If your car is shifting properly, and you do not have excessive noise coming from the transmission. I would drain it, leaving it over night to drip out. Than refill with new oil.

Are you just feeling the need to do something to your car?

If it isn’t broken? Don’t try to fix it!

TerryO · 11-06-2023, 09:16 AM

Quote:

If it isn’t broken? Don’t try to fix it!

Good advise but some folks like to fix it until it is broken...

TOB

Big hammer · 11-06-2023, 09:22 AM

Ford recommended flushing with kerosene, was that because of the old black 600w ? ATF is a high detergent oil , maybe drain fill with ATF and the rear tires off the ground run through the gears for a few minutes? Ford also recommended adding kerosene to the 600w for winter operation, so it shouldn’t hurt to flush with it.

GeneBob · 11-06-2023, 09:29 AM

I like Big Hammer's ATF advice. ATF will clean things while maintaining a level of lube and corrosion protection.

Bob Bidonde · 11-06-2023, 10:41 AM

If you have been using modern gear oils, there is no need to flush the transmission and differential because modern gear oil has disputants that keep debris in suspension. Also, modern gear oils do not form sludge.

31 ford · 11-06-2023, 10:59 AM

Thank you for the advice. Nothing is broke so probably best don't "fix". I will drain very well, refill with 600w, then done . GeneBob, Oldbluoval, Ordsgt, alexiskai, nkaminar, WHN, TerryO, Bighammer - I appreciate your replies !

katy · 11-06-2023, 10:59 AM

Bob, "disputants", did you mean "dispersants"?

updraught · 11-06-2023, 05:56 PM

Quote:

Originally Posted by katy

Bob, "disputants", did you mean "dispersants"?

"Britannica Dictionary definition of DISPUTANT. [count] formal. : a person who is involved in a dispute and especially in a legal dispute."

Autocorrect: Helping to widen your English vocabulary.

Synchro909 · 11-07-2023, 12:53 AM

Quote:

Originally Posted by updraught

"Britannica Dictionary definition of DISPUTANT. [count] formal. : a person who is involved in a dispute and especially in a legal dispute."

Autocorrect: Helping to widen your English vocabulary.

The guy who invented autocorrect recently died. His funeral is tomato. May he roast in piss.

dave in australia · 11-07-2023, 01:24 AM

Quote:

Originally Posted by Synchro909

The guy who invented autocorrect recently died. His funeral is tomato. May he roast in piss.

I read that in a bad French accent, ala 'Allo Allo'

nkaminar · 11-07-2023, 07:26 AM

I will go with what Bob Bidonde said in Post #11. Do not use 600 weight oil but use the modern 85W-140 G5 gear oil. Your transmission will thank you. The modern oil has additives that will reduce wear and will help keep your transmission and rear end clean.

Oldbluoval · 11-07-2023, 07:30 AM

Does the 85w-140 affect the “synchro” for shifting? Never used it but I’ve heard the thicker viscosity enables easy in shifting

Sunny the Model A · 11-07-2023, 04:13 PM

I always do a kerosene flush to clean out any shavings and any sludge in the Tranny. I drive my pickup around a few times to get the stuff flowing, drain it out, and pour kerosene in it, I jack up one rear wheel, and chock the opposite wheel. I'll start it up, put it in each gear and let the clutch out and give it some revs, cleans out the tranny and strips all the crud off the gears, making 'em smooth and silky. I'll then refill with 600W and put a few tablespoons of amber general-purpose grease in the tranny, the grease mixes with the 600W and makes it shift smooth as butter. I also kerosene flush my rear axle when the time comes around to do it. I will usually jack up both rear wheels so both the tranny and axle can be done at the same time.

Synchro909 · 11-07-2023, 04:36 PM

Quote:

Originally Posted by dave in australia

I read that in a bad French accent, ala 'Allo Allo'

Guess what I did when I read this! It sounds much better.

11-05-2023, 11:35 PM	#2
GeneBob Senior Member Join Date: May 2017 Location: Denver Area Posts: 433	Re: Kerosene Why not just change the oil and let the new oil clean the innards? If you are worried about sludge, change the oil a second time after a thousand miles to see how it looks. Fresh oil provides better lube quality than old worn oil that has been sheared and broken down. Let sleeping sludge be.

11-06-2023, 12:57 AM	#3
Oldbluoval Senior Member Join Date: Jun 2015 Location: Signal Mtn, TN (SE TN) Posts: 2,372	Re: Kerosene 31 - I think it’s ok. Just let it drip out well .

11-06-2023, 07:10 AM	#4
Ordsgt Senior Member Join Date: Sep 2020 Location: Yorktown Virginia Posts: 182	Re: Kerosene If you go the kerosene route make sure you do not drain and let it sit too long. Kerosene will remove ALL traces of oil from everything and the oxidation (RUST) process will immediately start

11-06-2023, 07:26 AM	#5
alexiskai Senior Member Join Date: Apr 2018 Location: Mebane NC Posts: 2,355	Re: Kerosene I’ve done a kerosene flush for the transmission and it worked fine. It won’t hurt the gears just being in there for a few minutes. You’re supposed to rock the car or rotate the wheels to churn it. But as stated above, you should refill with oil promptly.

11-06-2023, 07:36 AM	#6
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,900	Re: Kerosene Sponsored Links (Register now to hide all advertisements) How dirty is the old oil? If it is fairly clean then just change it. If it is really dirty then you can clean it out with kerosene or other solvent. Then it becomes a problem of how to get rid of the dirty kerosene. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.

11-05-2023, 11:21 PM	#1
31 ford Member Join Date: Aug 2018 Posts: 39	Kerosene I will be changing the fluid in the differential and transmission soon . After I drain those fluids ,is it safe to flush the differential and transmission with 1-K Heater fuel kerosene before re-filling with 600w . Klean strip is the brand available in my area. Will this kerosene be safe and not harm the bearings and gears ? I'm only asking because earlier I read a post stating to flush those components with kerosene to remove any sludge . Thank you .

11-06-2023, 08:04 AM	#7
WHN Senior Member Join Date: Mar 2017 Location: Connecticut Shoreline Posts: 1,824	Re: Kerosene Why! If your transmission is that dirty? Maybe it needs to be removed, taken apart, and check if a rebuild is needed. If your car is shifting properly, and you do not have excessive noise coming from the transmission. I would drain it, leaving it over night to drip out. Than refill with new oil. Are you just feeling the need to do something to your car? If it isn’t broken? Don’t try to fix it!

11-06-2023, 09:22 AM	#9
Big hammer Senior Member Join Date: Jun 2014 Location: Land of Lincoln Posts: 3,131	Re: Kerosene Ford recommended flushing with kerosene, was that because of the old black 600w ? ATF is a high detergent oil , maybe drain fill with ATF and the rear tires off the ground run through the gears for a few minutes? Ford also recommended adding kerosene to the 600w for winter operation, so it shouldn’t hurt to flush with it. __________________ Don't force it with a little hammer tap, tap, tap get a bigger hammer tap done

11-06-2023, 09:29 AM	#10
GeneBob Senior Member Join Date: May 2017 Location: Denver Area Posts: 433	Re: Kerosene I like Big Hammer's ATF advice. ATF will clean things while maintaining a level of lube and corrosion protection.

11-06-2023, 10:41 AM	#11
Bob Bidonde Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 3,472	Re: Kerosene If you have been using modern gear oils, there is no need to flush the transmission and differential because modern gear oil has disputants that keep debris in suspension. Also, modern gear oils do not form sludge. __________________ Bob Bidonde

11-06-2023, 10:59 AM	#12
31 ford Member Join Date: Aug 2018 Posts: 39	Re: Kerosene Thank you for the advice. Nothing is broke so probably best don't "fix". I will drain very well, refill with 600w, then done . GeneBob, Oldbluoval, Ordsgt, alexiskai, nkaminar, WHN, TerryO, Bighammer - I appreciate your replies !

11-06-2023, 10:59 AM	#13
katy Senior Member Join Date: Jun 2015 Location: Red Deer, Alberta Posts: 5,046	Re: Kerosene Bob, "disputants", did you mean "dispersants"? __________________ If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn!

11-07-2023, 07:26 AM	#17
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,900	Re: Kerosene I will go with what Bob Bidonde said in Post #11. Do not use 600 weight oil but use the modern 85W-140 G5 gear oil. Your transmission will thank you. The modern oil has additives that will reduce wear and will help keep your transmission and rear end clean. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.

11-07-2023, 07:30 AM	#18
Oldbluoval Senior Member Join Date: Jun 2015 Location: Signal Mtn, TN (SE TN) Posts: 2,372	Re: Kerosene Does the 85w-140 affect the “synchro” for shifting? Never used it but I’ve heard the thicker viscosity enables easy in shifting

11-07-2023, 04:13 PM	#19
Sunny the Model A Senior Member Join Date: Jul 2021 Location: Charleston SC Posts: 169	Re: Kerosene I always do a kerosene flush to clean out any shavings and any sludge in the Tranny. I drive my pickup around a few times to get the stuff flowing, drain it out, and pour kerosene in it, I jack up one rear wheel, and chock the opposite wheel. I'll start it up, put it in each gear and let the clutch out and give it some revs, cleans out the tranny and strips all the crud off the gears, making 'em smooth and silky. I'll then refill with 600W and put a few tablespoons of amber general-purpose grease in the tranny, the grease mixes with the 600W and makes it shift smooth as butter. I also kerosene flush my rear axle when the time comes around to do it. I will usually jack up both rear wheels so both the tranny and axle can be done at the same time. __________________ "Quality means doing it right when no one is looking" Henry Ford