Manual said change transmission fluid only need in certain conditions
 

My 2010 (5thGen) T4R manual said:

Replace automatic transmission fluid every 60k miles only if you drive primarily under the conditions indicated below:
- Driving while towing, using a car-top carrier, or heavy vehicle loading

Does it mean if I drive it only for family around mainly doesn't need to do transmission fluid flush/change at all? I don't believe this.

I currently have 150k km (Around 100k Miles). Can I still do flush? or I better ends up drain only. Or I can follow manual and do nothing?

There are so many different opinions out there, very confusion.

Thanks

Yes, do a complete fluid exchange using Toyota brand WS fluid.

Hi, Seymore. Thanks for your reply. Do you mean a complete flush? One dealer recommended a full flush ($360 and not drop pan, no filter clean/change) and he said it won’t cause any issue. But another dealer recommend me to do a drain/fill first to begin with. An flush can be done later and they charge $260 only.

Looks like it is totally personal decision after all :-)

Thanks!


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I'll be servicing my transmission and transfer case every 50K I change my diff fluid every 25K and engine oil every 5K Maintenance is key and your fluids can never be too fresh. Cheap peace of mind if you ask me.

Complete exchange using either the flush method the dealer recommended or the exchange using transmission cooler lines. Ask the dealer if they use Toyota WS fluid.. Most dealers around here use a "compatible" non-Toyota fluid, which is not the perfect specification for your transmission.

Drain and fill is inappropriate because it leaves most of your old fluid in the transmission.

After finally coming to the unsettling conclusion that I can't let a Toyota dealership "service" my car, have found a highly reputable, independant shop that specializes in Toyotas (Toyota Master Tech-owned with another on staff) in my general area (45 minute drive away). They have recommended essentially the same thing if one cares about their investment. Peace of mind is worth the cost to me. Being old, half crippled and an apartment dweller, having a competent, honest mechanic to work on my vehicle is actually cheap if I can buy that with money.

This is the 4th year I own my 4R... and I will be doing my 4th drain and fill next OC...


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I have never had a transmission flush. You all are about to convince me to do it.

According to a 5th Gen 4Runner Scheduled Maintenance Guide, the transmission fluid should be first inspected at 30,000 miles, then again at 60,000 miles.

If you use your 4Runner for towing, under the Special Operating Conditions it is recommended to replace the transmission fluid at 60,000 miles.

Next inspection of the transmission fluid is at 90,000 miles, then again at 120,000 miles. Transmission fluid replacement (under SOC) is recommended at 120,000 miles.

Here is a link to a video explaining when you should change your transmission fluid, answering whether or not changing your transmission fluid could damage your transmission, and whether or not to change or flush the transmission fluid.

YouTube

And this link to a video outlining the steps to actually change (not flush) the transmission fluid.

YouTube

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This comment is only applicable to the current 5 gen models excluding 2WD variants. All 4Runner are 4WD, but not all are AWD. The Limited is the only one that can do both. If snow performance if important to you, then the Limited is ideal.

By the way... I also own a 2004 Silverado Z71, its a great truck, but the 4Runner is certainly built better. I still keep it around because when you need a truck, you need a truck.

I agree… I all fluids eventually degrade over time.

They may say its good for the life of the transmission, but in the manufactures eyes, what exactly does that mean? Till the warranty expires?

You absolutely should since “lifetime” fluid is a myth, but at 220K, you don’t want a flush, you want a full-fluid exchange. The difference is that a flush uses pressure while an exchange is just that - old fluid out and new in. There are several 4th Gen write ups on how to do it.

I have heard that it is better to just change the fluid rather than do a flush if the fluid has not been changed regularly; reason being that a pressurized flush can dislodge debris inside the transmission, which will start causing problems down the line.

i dont think it would hurt!