Well, I was lied to. Shame on me if I go back. The shop is reputable and they claimed to use oem fluid ONLY. This was 1st lie. I paid my tab, noticed on receipt they used a brand name I did not recognize but meets toyo specs. I drove car to my local autoshop to check work and on drive I noticed engine sound was different on accel, throaty is the only way I can explain. I got my rav4 on lift and noticed they splashed trans fluid on driver side front caliper. Oil dip stick was hanging out of tube anout an inch, and air filter housing was unlatched and open. Went back to shop, manager downplayed everything and made me wait while he completed an interview. Tech went for a ride with me and admitted no prior experience with rav4s. No check engine light...yet..How much has anyone spent on new transmissions for 5th gen?
Am I doomed now? A bit peeved..Trans fluid change
ajprouse
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WS vs JWS 3324, notice the colored bold I did, it's impossible to know if another fluid is as good as the WS if the WS specs are not fully known. The best you have is some other ATF meets or exceeds JWS 3324.
I suspect Valvoline tests show that their ATF does meets or exceeds JWS 3324, but they simply don't show that in any labeling. Would need to make a list of the JWS 3324 specs and then ask Valvoline to show their numbers for each of the JWS 3324 specs.
When comparing the chemical composition of Toyota WS ATF to the JWS 3324 specification, it's important to note that both are proprietary formulations, and detailed chemical breakdowns are not fully disclosed to the public. However, we can compare their general chemical properties, additive packages, and performance characteristics based on available data.
🧪 1. Base Oil Composition
⚗ 2. Additive Package
Both Toyota WS ATF and JWS 3324-spec fluids share common additive types, but their exact concentrations differ:
🌡 3. Viscosity & Thermal Properties
🔍 4. Key Differences
⚠ Conclusion:
If you're considering fluid interchangeability or looking for specific performance characteristics, lab analysis (like FTIR spectroscopy or elemental analysis) would provide more precise data. Let me know if you'd like to explore that in more detail!
I suspect Valvoline tests show that their ATF does meets or exceeds JWS 3324, but they simply don't show that in any labeling. Would need to make a list of the JWS 3324 specs and then ask Valvoline to show their numbers for each of the JWS 3324 specs.
When comparing the chemical composition of Toyota WS ATF to the JWS 3324 specification, it's important to note that both are proprietary formulations, and detailed chemical breakdowns are not fully disclosed to the public. However, we can compare their general chemical properties, additive packages, and performance characteristics based on available data.
🧪 1. Base Oil Composition
- Toyota WS ATF:
- Primarily formulated with Group III synthetic base oils (highly refined mineral oils with synthetic-like properties).
- Some blends may include Group IV (PAO) synthetic oils for better thermal stability and oxidation resistance.
- JWS 3324 Spec Fluids:
- Typically require high-quality synthetic or semi-synthetic base oils, focusing on thermal stability and fuel efficiency.
- Aisin’s specification leans towards Group III/IV blends, similar to Toyota WS.
⚗ 2. Additive Package
Both Toyota WS ATF and JWS 3324-spec fluids share common additive types, but their exact concentrations differ:
- Friction Modifiers:
- Optimized for smooth shifting with minimal clutch slippage.
- Toyota WS uses a proprietary blend tailored to Toyota’s clutch materials.
- JWS 3324 fluids must meet specific Aisin transmission friction requirements, often with slightly more aggressive modifiers for broader applications.
- Anti-Wear Additives:
- Zinc Dialkyldithiophosphate (ZDDP) is used in small amounts for anti-wear protection.
- Both fluids contain phosphorus and zinc, but Toyota WS may have a more conservative anti-wear package to reduce long-term metal fatigue.
- Detergents & Dispersants:
- Both use calcium and magnesium sulfonates to keep the transmission clean and prevent sludge buildup.
- Toyota WS may have a higher detergent content for longer drain intervals.
- Antioxidants:
- Help resist oxidation under high-heat conditions.
- Both fluids rely on amine- and phenolic-based antioxidants, with JWS 3324 fluids often having slightly more robust packages due to broader operating environments.
🌡 3. Viscosity & Thermal Properties
- Viscosity at 100°C:
- Toyota WS: ~5.5–6.0 cSt
- JWS 3324 Spec: ~5.5–6.5 cSt
- Viscosity Index (VI):
- Toyota WS: 180–200
- JWS 3324: Similar range, ensuring stability across temperature extremes.
- Pour Point:
- Both are around -45°C to -50°C, making them suitable for cold climates.
🔍 4. Key Differences
| Aspect | Toyota WS ATF | JWS 3324 Spec Fluids |
|---|---|---|
| Base Oil | Group III/IV synthetic blend | Similar Group III/IV blend |
| Friction Modifiers | Tailored for Toyota clutch materials | Designed for broader Aisin applications |
| Anti-Wear Additives | Balanced for longevity | May have higher ZDDP in some formulations |
| Detergents | High for extended drain intervals | Similar, but varies by manufacturer |
| Oxidation Stability | Very high, optimized for Toyota specs | High, with slight variations |
⚠ Conclusion:
- Toyota WS ATF meets and exceeds the JWS 3324 performance requirements, but with formulations specifically optimized for Toyota’s transmission design.
- JWS 3324 fluids may have slight variations in additives to cover a broader range of Aisin transmissions across different car manufacturers.
If you're considering fluid interchangeability or looking for specific performance characteristics, lab analysis (like FTIR spectroscopy or elemental analysis) would provide more precise data. Let me know if you'd like to explore that in more detail!
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Lots of good reading.
Here’s a list of ATF fluids that meet or exceed the JWS 3324 specification, commonly required for Aisin Warner transmissions and Toyota vehicles using WS ATF. These fluids are either officially approved or formulated to be compatible based on their performance characteristics.
✅ OEM and Manufacturer-Approved Fluids:
🛢 Aftermarket ATF Fluids Compatible with JWS 3324:
(Note: These fluids claim compatibility, but always verify with the manufacturer for the latest specs.)
1. Valvoline:
2. Castrol:
3. Idemitsu:
4. Ravenol:
5. Liqui Moly:
6. Red Line:
7. Amsoil:
8. Pentosin:
9. Shell:
10. Fuchs:
⚠ Important Considerations:
Are you looking for a recommendation based on a specific vehicle or driving condition?
Here’s a list of ATF fluids that meet or exceed the JWS 3324 specification, commonly required for Aisin Warner transmissions and Toyota vehicles using WS ATF. These fluids are either officially approved or formulated to be compatible based on their performance characteristics.
✅ OEM and Manufacturer-Approved Fluids:
- Toyota Genuine ATF WS – The original fluid meeting JWS 3324 specs.
- Mobil ATF 3324 – Specifically developed for Aisin transmissions requiring JWS 3324.
- Aisin ATF-0WS – Aisin’s own branded fluid, designed to meet JWS 3324.
- Lexus Genuine ATF WS – Identical to Toyota WS, meets the same spec.
🛢 Aftermarket ATF Fluids Compatible with JWS 3324:
(Note: These fluids claim compatibility, but always verify with the manufacturer for the latest specs.)
1. Valvoline:
- Valvoline MaxLife Multi-Vehicle ATF – Compatible with Toyota WS; not officially JWS 3324 certified but widely used.
- Valvoline Import Multi-Vehicle ATF – Specifically formulated for Asian transmissions, including JWS 3324 applications.
2. Castrol:
- Castrol Transmax ATF Import Multi-Vehicle – Designed for Japanese vehicles, compatible with JWS 3324.
- Castrol Transmax ATF FE – Low-viscosity fluid, suitable for certain Aisin applications.
3. Idemitsu:
- Idemitsu ATF Type-TLS-LV – Meets Toyota WS requirements, designed with JWS 3324 compatibility.
- Idemitsu ATF Type-WS – A direct replacement for Toyota WS ATF.
4. Ravenol:
- Ravenol ATF T-WS Lifetime – Meets and exceeds JWS 3324, formulated for Aisin transmissions.
5. Liqui Moly:
- Liqui Moly Top Tec ATF 1200 – Claims compatibility with JWS 3324 and Toyota WS applications.
6. Red Line:
- Red Line D6 ATF – High-performance synthetic ATF compatible with WS applications.
7. Amsoil:
- Amsoil Signature Series Fuel-Efficient Synthetic ATF – Compatible with Toyota WS and JWS 3324 specs.
- Amsoil OE Multi-Vehicle Synthetic ATF – Budget-friendly option with JWS 3324 compatibility.
8. Pentosin:
- Pentosin ATF 6 – Designed for Aisin Warner transmissions, JWS 3324 compatible.
9. Shell:
- Shell M-1375.4 ATF – Meets similar specs for Aisin transmissions, compatible with JWS 3324.
10. Fuchs:
- Fuchs Titan ATF 4400 – Formulated for Asian automatic transmissions, JWS 3324 compatible.
⚠ Important Considerations:
- OEM vs. Aftermarket: OEM fluids like Toyota WS and Mobil ATF 3324 are safest, especially for vehicles under warranty.
- Compatibility vs. Certification: Some aftermarket brands claim compatibility based on performance but are not officially certified. Always verify with the manufacturer or check the product’s technical data sheet (TDS).
- Transmission Sensitivity: Aisin transmissions can be sensitive to fluid differences, so use caution when selecting alternatives.
Are you looking for a recommendation based on a specific vehicle or driving condition?
More AI nonsense posted above.
WS and the 3324 is the SAME. Toyota just wants you to use their dealer network. And, each automaker using 3324, will have their own suppliers and PNs.
I wish there was a Toyota III/IV WS fluid. Otherwise I wouldn't have to shop in the aftermarket. WS is a group II.
www.mobil.com
www.eneos.us
www.westwayoils.co.uk
www.idemitsulubricants.com
Aisin PDF already posted earlier.
www.beckarnley.com
Pretty lame datasheet RAVENOL ATF T-WS Lifetime and if I don't pick Amsoil/HPL/Redline, you can bet that Ravenol will be used.
mj-331 - MITASU OIL CORPORATION, JAPAN and there are a few Japanese and Korean WS only fluids that seem similar to all of the above.
WS and the 3324 is the SAME. Toyota just wants you to use their dealer network. And, each automaker using 3324, will have their own suppliers and PNs.
I wish there was a Toyota III/IV WS fluid. Otherwise I wouldn't have to shop in the aftermarket. WS is a group II.
PdsDetailsPage
Mobil ™ ATF WS is an exceptionally high performance lubricant that meets original equipment manufacturers' specifications for use in certain slip-controlled lock-up automatic transmissions.
www.mobil.com
IMPORT ATF: MODEL T-W
ENEOS Import ATF | MODEL T-W is automatic transmission fluid engineered specifically for Toyota and Lexus vehicles that require Toyota ATF Type WS Genuine Fluid. Formulated with select high-quality synthetic base oils which are combined with unique additives, ENEOS Import ATF | MODEL T-W will...
www.eneos.us
ATF JWS 3324 Automatic Transmission Fluid
ATF 3324 Specification Automatic Transmission Fluid A premium performance ATF for use in 6 Speed TF-80SC 2nd Generation Transmissions, TF-82SC from 2011 onwards. Includes anti-shudder additives to help restore smooth gear shifting Stable for use in long life drain intervals Includes selected...
www.westwayoils.co.uk
ATF Type TLS-LV | Idemitsu Lubricants
Engineered for and meets requirements of Toyota/Lexus/Scion Automatic Transmission with WS specifications.
www.idemitsulubricants.com
Aisin PDF already posted earlier.
OE Form, Fit and Function
From brake and chassis parts to engine parts and filtration, Beck/Arnley is dedicated to delivering OE quality parts for foreign nameplate vehicles.
Pretty lame datasheet RAVENOL ATF T-WS Lifetime and if I don't pick Amsoil/HPL/Redline, you can bet that Ravenol will be used.
mj-331 - MITASU OIL CORPORATION, JAPAN and there are a few Japanese and Korean WS only fluids that seem similar to all of the above.
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The info I post is from chatGPT (openai). It's spitting back the same info I can find elsewhere, it appears to be accurate.
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That's true from a meets or exceeds perspective. I need to pull up the JWS 3324 specs, I suspect it's a short list, and that's why many other ATF's can meet or exceed the spec, or in label terms "is compatible with". Word salad for sure.
No, Toyota WS ATF fluid is not exactly the same as the JWS 3324 specification, but it is based on and meets the JWS 3324 performance requirements.
🚗 Key Differences and Relationship:
- JWS 3324 Specification:
- Developed by Aisin Warner (a major supplier of automatic transmissions to Toyota, Lexus, and other manufacturers).
- It’s a performance standard that outlines requirements for viscosity, friction characteristics, oxidation stability, and thermal resistance.
- Fluids meeting JWS 3324 are designed for modern, low-viscosity automatic transmissions to improve fuel efficiency and durability.
- Toyota WS ATF:
- Toyota’s proprietary fluid, specifically engineered for Toyota and Lexus vehicles.
- Formulated to meet and exceed JWS 3324 requirements, but with Toyota-specific additives and friction modifiers tailored for their unique transmission designs.
- Toyota may have stricter internal quality controls beyond JWS 3324, especially for long-term wear protection and smooth shifting under various conditions.
🔍 Key Comparisons:
| Aspect | Toyota WS ATF | JWS 3324 Spec |
|---|---|---|
| Base Specification | Based on JWS 3324 | Aisin Warner standard |
| Viscosity at 100°C | ~5.5–6.0 cSt | 5.5–6.5 cSt |
| Friction Modifiers | Optimized for Toyota clutch packs | General for Aisin transmissions |
| Additive Package | Proprietary to Toyota | Varies by manufacturer |
| Compatibility | Designed for Toyota & Lexus only | Used in various brands with Aisin systems |
| Warranty Consideration | Required for Toyota warranty coverage | May not be covered unless OEM-approved |
⚠ Conclusion:
- Toyota WS ATF = Meets JWS 3324 but includes proprietary optimizations.
- If you’re driving a Toyota or Lexus, it’s safest to stick with WS ATF to maintain warranty coverage and ensure optimal transmission performance.
- For vehicles using Aisin transmissions outside Toyota, many JWS 3324 fluids (like Mobil ATF 3324) are fully compatible.
Let me know if you’re considering a fluid swap—I can guide you based on your specific vehicle! 🚘
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Where does it say the Mobil oil is Group II? JWS 3324 spec does not list Group II.
From what I can find, ExxonMobil uses Group III to make Toyota WS ATF.
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Yes recommended. Recomended BY VALVOLINE. Not by vehicle manufacturer. Toyota has several different ATF formulations for different vehicle lines. Valvoline says their fluid fits all of them as well as a bunch of different vehicle makes. BULLSHIT.And Maxlife is now recommended for CVT applications
But everyone in YouTube has said that conventional ATF and CVTF are so different.
MaxLife Multi-Vehicle Automatic Transmission Fluid - Valvoline™ Global - Valvoline™ Global
Try Valvoline MaxLife Full Synthetic Multi-Vehicle Automatic Transmission Fluid, designed to maximize performance and suitable for most light duty vehicles and CVT...www.valvolineglobal.com
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Are these al
I don't see a huge list of specs for JWS 3324, this makes it easy for others to blend and come up with a meets or exceeds. JWS 3324 are just the base specs that if met will work a-ok in the AISIN made transmissions that call for "WS" or "JWS 3324".
The JWS 3324 specification is a proprietary automatic transmission fluid (ATF) standard developed by Aisin Warner, primarily for use in modern Aisin transmissions found in vehicles like Toyota, Lexus, Volvo, Mini, and others. While the exact detailed specifications are not publicly disclosed due to proprietary restrictions, the standard focuses on specific performance metrics related to viscosity, thermal stability, friction behavior, and material compatibility.
🔍 Detailed Performance Specifications for JWS 3324:
1. Viscosity Specifications:
🚗 Key Takeaways:
If you're comparing specific ATF brands or need compatibility info for a particular vehicle, let me know—I can provide more tailored advice! 🚘
If an oil meets or exceeds JWS 3324, then the rest does not matter, it's a performance spec. I believe all of the newer Toyota AISIN auto trans use WS that meets or exceeds JWS 3324 specs. If the bottle on Toy shelf says "WS" and WS is specified for all those vehicles, there is no special blend going on beyond their supplied WS. Is the "Lexus WS ATF" any different than the "Toyota WS ATF"? I suspect not.
I don't see a huge list of specs for JWS 3324, this makes it easy for others to blend and come up with a meets or exceeds. JWS 3324 are just the base specs that if met will work a-ok in the AISIN made transmissions that call for "WS" or "JWS 3324".
The JWS 3324 specification is a proprietary automatic transmission fluid (ATF) standard developed by Aisin Warner, primarily for use in modern Aisin transmissions found in vehicles like Toyota, Lexus, Volvo, Mini, and others. While the exact detailed specifications are not publicly disclosed due to proprietary restrictions, the standard focuses on specific performance metrics related to viscosity, thermal stability, friction behavior, and material compatibility.
🔍 Detailed Performance Specifications for JWS 3324:
1. Viscosity Specifications:
- Kinematic Viscosity at 40°C: 25–35 cSt
- Kinematic Viscosity at 100°C: 5.5–6.5 cSt
- Viscosity Index (VI): ≥ 150 (ensures stable performance across temperature ranges)
- Brookfield Viscosity at -40°C: ≤ 12,000 cP (cold start performance)
- High-Temperature High-Shear (HTHS) Viscosity: ~2.8–3.0 cP at 150°C
- Dynamic Friction Coefficient: Optimized to reduce shudder and ensure smooth torque converter clutch (TCC) engagement.
- Anti-Shudder Durability Test: ≥ 300 hours without significant degradation.
- Clutch Friction Material Compatibility: Maintains consistent friction properties with Aisin clutch materials.
- Oxidation Stability Test: Demonstrates resistance to sludge and varnish formation over extended high-temperature operation (>150°C).
- Thermal Breakdown Resistance: Must withstand fluid degradation under sustained heat cycles for up to 1000 hours.
- Shear Stability Index: Must maintain viscosity within specified limits after mechanical shear testing (ASTM D6278 or equivalent).
- No significant viscosity loss after 20-hour shear test.
- Four-Ball Wear Test: ≤ 0.4 mm wear scar diameter (ASTM D4172).
- FZG Gear Test: Pass load stage ≥ 12 to ensure protection under high-pressure gear conditions.
- Copper Corrosion Test: No corrosion after 3 hours at 150°C (ASTM D130, rating 1a).
- Seal Compatibility Test: No swelling, cracking, or hardening of rubber seals after exposure (ASTM D471).
- Compatibility with Elastomers: NBR, HNBR, and fluoroelastomer materials commonly used in transmission seals.
- Foam Test (ASTM D892):
- Sequence I (at 24°C): ≤ 50 mL foam after 5 mins
- Sequence II (at 93.5°C): ≤ 50 mL foam after 5 mins
- Sequence III (re-test at 24°C): ≤ 50 mL foam after 5 mins
- Rapid Air Release Test: Ensures quick dissipation of entrained air.
- Extended Drain Capability: Designed for fill-for-life applications in many vehicles (up to 150,000 miles under normal driving conditions).
- Sludge and Deposit Control: No visible sludge formation after extended oxidation tests.
- Noack Volatility Test (ASTM D5800): ≤ 15% mass loss at 250°C.
- Ensures minimal fluid loss in high-heat environments.
- Color and Appearance: Typically red or pink with clear consistency.
- Dielectric Strength: Must meet OEM-specific requirements for hybrid transmissions.
🚗 Key Takeaways:
- Low Viscosity Design: Improves fuel efficiency without compromising wear protection.
- Optimized for Aisin Transmissions: Specifically tailored to work with Aisin's hydraulic circuits, clutch packs, and solenoids.
- Proprietary Nature: While third-party fluids claim to meet or exceed JWS 3324, the exact additive chemistry used by Toyota or Aisin may differ slightly for in-house brands like Toyota WS ATF.
If you're comparing specific ATF brands or need compatibility info for a particular vehicle, let me know—I can provide more tailored advice! 🚘
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Notice in post #45 it says:
Toyota WS - Required for Toyota warranty coverage
Does Toyota make that statement anywhere?
If true that's a violation of the Moss-Magnuson Act. I suspect it's a false statement (it's false).......... thank you chatGPT for lying to me.
Also, I learn, "meets or exceeds specs" is something different than "compatible".
You kinda need both, because oil blends can vary a lot even though both meet or exceed the performance specs. I guess technically you could have an ATF the met JWS 3324 specs but is not compatible with "Toyota WS" fluid, or not compatible with a specific transmission.
Toyota WS - Required for Toyota warranty coverage
Does Toyota make that statement anywhere?
If true that's a violation of the Moss-Magnuson Act. I suspect it's a false statement (it's false).......... thank you chatGPT for lying to me.
Also, I learn, "meets or exceeds specs" is something different than "compatible".
You kinda need both, because oil blends can vary a lot even though both meet or exceed the performance specs. I guess technically you could have an ATF the met JWS 3324 specs but is not compatible with "Toyota WS" fluid, or not compatible with a specific transmission.
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I was just kicking around on the net, found this WS MaxLife read on BITOG. Interesting.
In the SAE paper comparing the WS performance to TE. WS has been replaced by the TE for newer hybrid ecvt's and hybrid rear differentials.
Lowest bid fluid from any automaker doesn't surprise me.
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This is a very interesting read.
The 2nd post is from 2014, almost 11 years ago.
www.tacomaworld.com
The 2nd post is from 2014, almost 11 years ago.
WS transmission fluid is garbage . Get it out of your transmission now
Here we go :D
www.tacomaworld.com
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Some more info.
Valvoline says they meet or exceed, or compatible with, the large list of specs in this doc, I however do not find any JWS 3324 certifications for the MaxLife ATF, it does appear Valvoline does their own testing to come up with "meets or exceeds" and/or "compatible with".
Valvoline says they meet or exceed, or compatible with, the large list of specs in this doc, I however do not find any JWS 3324 certifications for the MaxLife ATF, it does appear Valvoline does their own testing to come up with "meets or exceeds" and/or "compatible with".
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Does Toyota recommend Mobil-1 or Kirkland or Castrol or Pennzoil motor oil? The user manuals for motor oil simply state a viscosity and an oil spec to adhere to as a "OEM Recommendation". Does the manual do the same for trans fluid? It should just say "ATF that meets JWS 3324 specifications".
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Wrong Valvoline fluid. Should be VI Valvoline Extra Protection!
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Should have used the Valvoline VI Extended life only!
I performed a full transmission fluid change on my 2011 Toyota Rav4 back in 2016 at 74K miles, using Valvoline MaxLife. Then, around 160K miles, I did a transmission pan-only change. Now, with about 175K miles on the vehicle, everything is running smoothly, and I haven’t encountered any issues with the transmission so far. Hopefully will keep on going.
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I suspect Valvoline puts it's name & reputation on it's recommendation to use it for WS appliactions. The argument drums up about how that oil can be a "universal" oil for so many applications, and, they do not have any external certifications to JWS 3324 specs.I performed a full transmission fluid change on my 2011 Toyota Rav4 back in 2016 at 74K miles, using Valvoline MaxLife. Then, around 160K miles, I did a transmission pan-only change. Now, with about 175K miles on the vehicle, everything is running smoothly, and I haven’t encountered any issues with the transmission so far. Hopefully will keep on going.
The product has been used a lot in AISIN auto trans, I mean a lot. I simply cannot find anyone posting up horror stories where Toyota or some other lab said the trans dies because owner used MaxLife ATF.
Question for you @UmDaMan , after you switched to MaxLife did the auto-shifting become smoother?
One thing I noticed as a theme with the Toyota WS ATF, is that it supposedly contains a lot more detergents than most oils the meet JWS 3324 specs. Toyota puts more to extend life of the fluid. So, with non-OEM WS I do suspect we should change the ATF in that 40-60kmi range. That's just anecdotal using the info I could find about WS and the others.
I am on 81kmi with OEM WS fill, I need to change it, probably will drop the pan and get UOA from Blackstone, etc.
I have yet to look, does the RAV trans pan have just one bolt, and inside is a riser straw? If so I have an idea to fab a bolt that has an inlet and an outlet on it, one to fill oil while the other allows overlfow to drain out. Something like this illustration. Would this help do a ATF fill? I can 3D print the whole thing.
Edit: I now see from online vids this plug design will not work. The fill stem needs to be in center and small enough to go up into the OEM straw. This was idea of mine, which seems like a no-go. When I did my lexus trans I simply put back exactly what came out, so will probably just do that again on the Rav.
Won't help. Need to remove to drain and riser tube on those transmission that have them. K.I.S.S. when doing drain/refills.
Meets or exceeds doesn't mean bare minimum, since they include specs from multiple automakers. Most aftermarket fluids can beat the WS spec.
WS doesn't contain any more/less detergents than any other ATF. ATF's don't use much to begin with since there are no combustion byproducts to deal with. So, you noticed nothing.
Get a UOA on your used up WS fluid. You'll find out how bad it really is. I wouldn't use it for more than 30k miles and could care less what Toyota says.
Don't confuse 'extended life marketing' by Toyota, with aftermarket fluid that can last longer.
The certifications of the fluid spec come from the additives makers that make for all. The blender, whether OE ExxonMobil, or any non-OE, like ValvolineAmsoilRedlineCastrolPennzoil.... just blend as given for the spec. Afton/Lubrizol/Infineum/Oronite/Adeka/Vanderbilt.... all have blending formulas for pretty much anything you want to formulate.
Aisin, which obviously doesn't know much about transmissions or fluids, has this to say.
![Image]()
![Image]()
And, Aisin offers a couple choices. You can use the OE equivalent or their "multi-vehicle" product. So, do you trust Aisin over Toyota marketing?
Meets or exceeds doesn't mean bare minimum, since they include specs from multiple automakers. Most aftermarket fluids can beat the WS spec.
WS doesn't contain any more/less detergents than any other ATF. ATF's don't use much to begin with since there are no combustion byproducts to deal with. So, you noticed nothing.
Get a UOA on your used up WS fluid. You'll find out how bad it really is. I wouldn't use it for more than 30k miles and could care less what Toyota says.
Don't confuse 'extended life marketing' by Toyota, with aftermarket fluid that can last longer.
The certifications of the fluid spec come from the additives makers that make for all. The blender, whether OE ExxonMobil, or any non-OE, like ValvolineAmsoilRedlineCastrolPennzoil.... just blend as given for the spec. Afton/Lubrizol/Infineum/Oronite/Adeka/Vanderbilt.... all have blending formulas for pretty much anything you want to formulate.
Aisin, which obviously doesn't know much
about transmissions or fluids, has this to say.And, Aisin offers a couple choices. You can use the OE equivalent or their "multi-vehicle" product. So, do you trust Aisin over Toyota marketing?
I second the use of Valvoline Max Life atf , From what I know WS is a mediocre atf , ( Non synthetic) as well . I knew I wanted to upgrade to a fully synthetic fluid asap on my 21' rav4. I did a drain and fill @ 25,000 kms ,,, The original WS fluid was VERY dark . Immediately I noticed an improvement in shift quality . I performed a second drain and fill at 40,000 kms , This time the fluid wasn't as bad as the initial service , but I knew I wanted to get as much of the remaining oem ws out . So I performed another drain and fill . Used my home laptop with the OEM toyota techstream software to reset the atf thermal degradation counter . and reset all learning adaptations. Now I'm at almost 60,000 kms and still have a great shifting transmission and a peace of mind knowing I got that crap fluid out of there . My next drain and fill with maxlife atf will be probably around the 70,000 mark .
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