Question about 1998 Oldsmobile Silhouette

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My transmission fluid turned brown. I beleive from getting hot.The bad radiator I think caused this. Should I change the fluid or leave it alone?

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You are right to look at the tranny fluid as worn...as it has turned brown. This happens naturally over time and mileage. Depending on the mileage, sometimes it is not recommended to open the transmission pan to change fluid and filter. If over 100,000 miles, check with your local shop for tranny flush or fluid filter change per warranty consideration. You can add a bottle of Lucas Oil Transmission Stabilizer to your tranny without having to drain any fluids. I have used this often on higher mileage cars with great success. The bottle costs about $11. even at your local Walmart:) Read the instructions carefully as the full bottle contents need to be added with engine running and tranny warm. Hope this helps.

Posted on Mar 18, 2011

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2 Answers

I have a 2005 nissan pathfinder the code p1757 came up yesterday the check engine light is on and i have some oil or transmission fluid in my water


Well for Nissan vehicles the code means there is a problem with the ABS front brake solenoid valve. And that would not cause anything to leak into the radiator.
If the coolant is brown, its engine oil. If its pink, its transmission fluid.

Feb 10, 2013 | Cars & Trucks

1 Answer

Transmission fluid is leaking how do i fix it


Hi Sandra:
Normally if oil or transmission fluid mixes with coolant it will turn milky looking like a milkshake. Your leak must be pretty fresh. from your description that it is coming out of the coolant overflow I am thinking you have a radiator transmission cooler leaking into the cooling system.

You will need a new radiator and possibly all the coolant hoses if they have become soft from the transmission fluid.

In most cases if your getting transmission fluid in the radiator it is cause by a bad transmission cooler that is built into the radiator and the fix is to replace the radiator.

The repair will change in price from where the leak is coming from. If the pan is leaking or the rear seal your looking at $100.00 or less. If the front seal is leaking then around $550.00. The most common leak is the pan gasket. Also if the transmission fluid and filter have not been replaced in the last 30,000 miles and the pan is leaking then I suggest doing this also why the pan is off .

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Feb 27, 2012 | Cars & Trucks

1 Answer

Transmission fluid is leaking


Hi Sandra:
Normally if oil or transmission fluid mixes with coolant it will turn milky looking like a milkshake. Your leak must be pretty fresh. from your description that it is coming out of the coolant overflow I am thinking you have a radiator transmission cooler leaking into the cooling system.

You will need a new radiator and possibly all the coolant hoses if they have become soft from the transmission fluid.

In most cases if your getting transmission fluid in the radiator it is cause by a bad transmission cooler that is built into the radiator and the fix is to replace the radiator.

The repair will change in price from where the leak is coming from. If the pan is leaking or the rear seal your looking at $100.00 or less. If the front seal is leaking then around $550.00. The most common leak is the pan gasket. Also if the transmission fluid and filter have not been replaced in the last 30,000 miles and the pan is leaking then I suggest doing this also why the pan is off .

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Feb 27, 2012 | Cars & Trucks

1 Answer

Transmission oil is leaking


Normally if oil or transmission fluid mixes with coolant it will turn milky looking like a milkshake. Your leak must be pretty fresh. from your description that it is coming out of the coolant overflow I am thinking you have a radiator transmission cooler leaking into the cooling system.

You will need a new radiator and possibly all the coolant hoses if they have become soft from the transmission fluid.

In most cases if your getting transmission fluid in the radiator it is cause by a bad transmission cooler that is built into the radiator and the fix is to replace the radiator.

The repair will change in price from where the leak is coming from. If the pan is leaking or the rear seal your looking at $100.00 or less. If the front seal is leaking then around $550.00. The most common leak is the pan gasket. Also if the transmission fluid and filter have not been replaced in the last 30,000 miles and the pan is leaking then I suggest doing this also why the pan is off .

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Feb 27, 2012 | Saturn Cars & Trucks

1 Answer

THERE IS BROWN SLUDGE IN RADIATOR AND SUV OVERHEATING WHAT CAN BE DONE?


It depends on what is causing the brown sludge. More information is needed to make an asessment and prescribe a solution. Brown sludge can be caused by engine oil or transmission fluid mixing with the engine coolant, or it can be caused by severe corrosion in the cooling system due to lack of proper cooling system maintenance.
The engine oil cause will most likely require head gasket replacement.
The transmission fluid cause will require radiator replacement.
The severe corrosion cause will most likely require a complete cooling system overhaul to properly correct it.

Oct 15, 2011 | 1996 Ford Explorer

1 Answer

Transmission turned brown when the over heating started.. Could the tranny been affected by the bad radiator? Do I change the transmission fluid or just leave it? The tranny is shifting hard into drive and...


The transmission fluid is cooled by the radiator and will break down if run hot. This causes damage to the transmission. Changing the oil and filter would be a very good idea.

Mar 18, 2011 | 1998 Oldsmobile Silhouette

1 Answer

Transmission works fine when cold but when transmission gets hot car will not move in drive or reverse


SOUND LIKE TRANSMISSION GETTING HOT CHECK TRANSMISSION FLUID LEVEL.IF LEVEL OKAY FLUID + FILTER BEEN CHANGED MAKE SURE TRANSMISSION COOLING LINES TO RADIATOR NOT PLUGGED CAUSING TRANSMISSION OVER HEAT. OR LEAKING TRANSMISSION FLUID.

Aug 29, 2010 | 1993 Dodge Spirit

1 Answer

Transmission


It would appear that the transmission is worn out! The transmission fluid is supposed to be red in color with no bad odor about it. When it turns brown & has a burnt smell to it -it means the fluid was low at some point and it got real hot (with an fluid & filter change it could be saved).
When it turns black it means that the fluid now is usually past the saving point as is contaminated with lots of metal filings in it. If you change the fluid & the filter at this point you've got a 50 /50 shot at maybe getting it functioning again -at least for a short while.
I personally would try the fluid & filter change if just to get it running again (although it may have some issues) although the real answer is to start looking for a new vehicle (due to it's age) or have the transmission rebuilt if the car has no other major problems and you think it would be worth it! BTW a rebuilt transmission goes for about $1200 which is probably more than the car is worth.

Jan 24, 2009 | 1999 Mercury Sable

3 Answers

Automatic transmission


Fluid can leak out of the driveshaft seals, the input shaft seal, the transmission pan gasket, the torque converter or the ATF cooler and line connections. If the fluid level gets low, the transmission may be slow to engage when it is shifted into drive. Gear shifts may be sloppy or delayed, or the transmission may slip between shifts. If the fluid level is really low, the transmission may cause the vehicle to not go at all.fluid level should be checked when the fluid is hot with the engine idling, the parking brake set and the transmission in Park. If fluid is needed, add only enough ATF to bring the level up to the full mark. Do not overfill because doing so can cause the fluid to become aerated, which may affect transmission operation. If the dipstick reads low, the transmission is probably leaking. So look underneath to see where the fluid is going. If there are no visible leaks, check the radiator for ATF in the coolant. The ATF cooler inside the radiator may be leaking and cross-contaminating the fluids.
You should also check the condition of the fluid. Some discoloration and darkening is normal as the fluid ages, but if the ATF is brown or has a burnt smell, it is badly oxidized and needs to be changed. Varnish on the dipstick is another indication of worn out fluid.
You can also do a "blotter test" to check for worn fluid. Place a few drops of ATF on a paper towel and wait 30 seconds. If the spot is widely dispersed and red or light brown in color, the fluid is in satisfactory condition. But if the spot does not spread out and is dark in color, the ATF is oxidized and should be changed.
Many transmission experts say most transmission problems can be prevented by changing the ATF and filter regularly for preventive maintenance. How often depends on how the vehicle is driven. For some vehicles, this might be every 30,000 miles or two years.
The harder the transmission works, the hotter the fluid runs. The life of the fluid drops quickly once its temperature gets up above about 200 degres F. Installing an aftermarket auxiliary ATF cooler that is parallel to the OEM ATF cooler is recommended to keep fluid temperatures down on vehicles that are used for towing or are driven hard.
ATF also becomes contaminated with normal wear particles from the clutch plates, bushings and gears. The filter will trap most of this debris before it can cause problems. But many older Asian transmissions only have a plastic or metal screen that does little to protect the transmission against internal contaminants and nothing to keep the fluid clean. On these vehicles, changing the fluid is the only way to get rid of these contaminants.
When adding or replacing ATF, use the type specified by the vehicle manufacturer. GM, Ford, Chrysler, Honda, Mercedes and others all have their own specs for ATF. There is no such thing as a "universal" ATF that works in all transmissions. Some fluids meet a variety of specifications, but cannot meet them all because of the different friction additives that are required.
Ford has three automatic transmission fluid specifications: Type F (a non-friction modified formula for most 1964-81 transmissions), Mercon (a friction modified ATF similar to Dexron II for 1988-97 transmissions), and Mercon V (Fords latest friction-modified formula, introduced in 1997).

Oct 12, 2008 | 1994 Honda Civic

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